Receiver Patents (Class 375/147)
  • Patent number: 10397947
    Abstract: Systems and methods of wireless communication in which wireless devices are adapted to implement adaptive waveform selection are disclosed. For example, operation according to embodiments may provide for use of a waveform design that minimizes peak-to-average power ratio (PAPR), such as single-carrier frequency division multiplexing (SC-FDM), as well as a waveform design that provides higher spectral efficiency, such as orthogonal frequency division multiplexing (OFDM), for scenarios that are not power-limited and the higher PAPR is acceptable. Adaptive waveform selection may be based implicitly on one or more parameters or may be based on explicit signaling. Adaptive waveform selection may be utilized with respect to initially establishing a communication link and/or with respect to an established communication link.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: August 27, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Tao Luo, Sony Akkarakaran
  • Patent number: 10389486
    Abstract: A communication system and method are disclosed for parallel processing of received signals to improve sensitivity of the system. Generally, the method includes demodulating a modulated signal in a first demodulator circuit and a second demodulator circuit in parallel. The first and second demodulated signals are then de-whitened, and a cyclic redundancy code (CRC) check performed on each. If the de-whitened first demodulated signal passes the CRC check a first packet included in the signal is sent to a central processing unit (CPU) for further processing. If the de-whitened second demodulated signal passes the CRC check, and the de-whitened first demodulated signal fails, a second packet included in the de-whitened second demodulated signal is transmitted to the CPU for further processing. In one embodiment, one of demodulator circuits is a GFSK demodulator operated in the phase domain and configured to use maximum likelihood sequence estimation. Other embodiments are also described.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: August 20, 2019
    Assignee: Cypress Semiconductor Corporation
    Inventors: Yan Li, Jie Lai, Hongwei Kong, Kamesh Medapalli
  • Patent number: 10381836
    Abstract: Power converter communications, including power converter communication methods and power converters that can communicate information, are disclosed. A control variable of a power converter is modulated, to modulate an output of the power converter for communicating information. Modulation of voltage or current on a circuit path to which the power converter is coupled could be detected, by another power converter, for example. Such modulation could be detected by sensors that are also used in controlling the power converter. Either or both of transmission and reception could therefore be provided without requiring any additional hardware at a power converter.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: August 13, 2019
    Assignee: SOLANTRO SEMICONDUCTOR CORP.
    Inventors: Tudor Lipan, James Benson Bacque, Raymond Kenneth Orr
  • Patent number: 10383077
    Abstract: The scheduling flexibility of CSI reference signals enables time and frequency synchronization using multiple non-zero CSI-RSs transmitted in the same subframe, or using CSI-RSs transmitted in the same subframe with other synchronization signals. Also, multiple synchronization signals may be scheduled in the same subframe to enable fine time and frequency synchronization without cell-specific reference signals.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: August 13, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Havish Koorapaty, Mattias Frenne, Daniel Larsson, Jiann-Ching Guey, Jung-Fu Cheng
  • Patent number: 10356806
    Abstract: A method, in a network node, for transmitting data in a heterogeneous network cellular communication system comprises transmitting of a SFN pilot signal (262). A SFN pilot signal is a pilot signal transmitted by all radio units of a heterogeneous network cell. Optionally, configuration information about non-SFN pilot signals in a cell of the network node is transmitted (260). Non-SFN pilot signals are pilot signals transmitted by less than all radio units of a heterogeneous network cell. The non-SFN pilot signal is transmitted (264). A control channel signal is transmitted (270) on a control channel and a data channel signal associated with the transmitted control channel signal is transmitted (280) on a data channel. A network node operable therefore is also presented. A method for receiving data in a heterogeneous network cellular communication system and a wireless device operable therefore are also presented.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: July 16, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Yi-Pin Eric Wang, Patrik Karlsson, Sairamesh Nammi, Fredrik Ovesjö
  • Patent number: 10333583
    Abstract: A signal detection circuit includes: a correlation circuit including the first through nth correlators connected sequentially as the first through nth stage correlators and each computing a correlation value between a received signal and a spreading sequence while shifting the received signal to the next stage depending on the chip rate period of the spreading sequence; a first adder that adds k correlation values computed by k correlators so as to generate a first addition value; a second adder that adds r correlation values computed by r correlators so as to generate a second addition value; a subtractor that subtracts the first addition value from the second addition value so as to generate a subtraction value; and a synchronization detection unit that compares the subtraction value with a threshold value, so as to detect the synchronization timing of the spreading sequence and the received signal.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: June 25, 2019
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventor: Takamitsu Hafuka
  • Patent number: 10334456
    Abstract: The present technology provides a new approach to optimizing wireless networks, including the coverage and capacity of cellular networks, using deep learning. The proposed method involves generating a group of cells comprising a cell identified as underperforming and one or more neighboring cells, ranking the one or more neighboring cells based on one or more relationship parameters between the underperforming cell and the one or more neighboring cells, and generating a multi-dimensional multi-channel state tensor for the group of cells based on the ranking of the one or more neighboring cells. This approach to cellular network optimization improves the coverage and capacity of cellular networks using a process that is faster, more accurate, less costly, and more robust.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: June 25, 2019
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Jin Yang, Yongxi Tan
  • Patent number: 10326480
    Abstract: The communication receiver comprises a mixer being configured to mix the communication signal with a periodic mixing signal having a mixing frequency fC to obtain a mixed communication signal, wherein the mixed communication signal comprises a first frequency spectrum portion comprising the spectral region of interest being situated around a frequency fRF+fC and a second frequency spectrum portion comprising the spectral range of interest being situated around fRF?fC; a first demodulator being configured to demodulate a first frequency channel of the plurality of frequency channels within the spectral range of interest of the first frequency spectrum portion on the basis of a first local oscillator frequency fLO1; and a second demodulator being configured to demodulate a second frequency channel of the plurality of frequency channels within the spectral region of interest of the second frequency spectrum portion on the basis of a second local oscillator frequency fLO2.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: June 18, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Dror Regev, Shimon Shilo, Doron Ezri, Chirn Chye Boon, Xiang Yi, Junping Zhang, Gengen Hu, Dong Liang, Sheng Liu
  • Patent number: 10321404
    Abstract: A device and a method for saving power in a mobile electronic device are provided. A mobile electronic device includes a plurality of antennas and a transceiver, wherein the transceiver includes a control unit configured to switch to a low power mode to operate in the low power mode, or to operate at least one of the plurality of antennas in the low power mode when a data non-transmission period occurs for a predetermined time in an active state.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: June 11, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seong-Wook Song, Jin-Hee Cheon, Da-Hae Chong
  • Patent number: 10313928
    Abstract: Methods, apparatus, systems and articles of manufacture to optimize power consumption and capacity in a multi-mode communication system are disclosed. A utilization factor controller is to estimate power consumption values corresponding to a plurality of first utilization factor and second utilization factor pairs, the first utilization factor corresponding to utilization of the first transceiver that is to communicate using a first protocol, the second utilization factor corresponding to utilization of the second transceiver that is to communicate using a second protocol different form the first protocol, the utilization factor controller to select a first utilization factor and second utilization factor pair based on the estimated power consumption value. A transmission time controller is to calculate first and second transmission times to be used by the first and second transceiver based on the selected first utilization factor and second utilization factor pair.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: June 4, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Wonsoo Kim, Il Han Kim
  • Patent number: 10313166
    Abstract: A system and method for augmenting the data capacity of pre-existing communications channels is provided. In one example, a subcarrier waveform of the system can be dithered based on data generated by an additional source and then transmitted. The dithered subcarrier can be passed through a plurality of matched filters so as to ascertain which dither pattern was used, thus ultimately allowing for the demodulation of the additional data source. The system and methods provided herein can be implemented with minimal impact to legacy users of the system as implementation of the dithering scheme can have minimal impact to the performance of receivers that are not equipped to demodulate the dithered waveforms.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: June 4, 2019
    Assignee: The MITRE Corporation
    Inventor: Brady O'Hanlon
  • Patent number: 10313068
    Abstract: Methods, apparatus, and systems for monitoring and measuring signal characteristics for signals received over a multi-wire, multi-phase interface are disclosed. Signals present on each line of a 3-line communication interface are sampled using auxiliary samplers having a programmable time delay to delay the sampled signal by a set time, as well as a programmable voltage offset. The auxiliary sampler outputs are compared with direct line samples of signals on each of the three lines to generate error signals. From this comparison, an array of error signal data occurring over a particular sampling period may be generated. In turn, waveform characteristics can be determined from the error signal data, such as an eye-pattern. Furthermore, skew measurement may further be effectuated using the auxiliary samplers but determining the time difference of when the error signals of the different wires cross a predetermined threshold.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: June 4, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Yasser Ahmed, Ying Duan
  • Patent number: 10298381
    Abstract: Data communication apparatus and methods for a multi-wire interface are disclosed. A half rate clock and data recovery (CDR) circuit derives a clock signal including pulses corresponding to symbols transmitted on a 3-wire interface, where the symbols are transmitted at a particular frequency with each of the symbols occurring over a unit interval (UI) time period. The first clock signal is input to a flip-flop logic included in a delay loop, and serves to trigger the first flip-flop logic. A second clock signal is generated using a programmable generator in the delay loop and has a frequency of a half UI and is fed back to a data input of the flip-flop. The output of the flip-flop is used as a recovered clock signal for the CDR at a half rate frequency. This design provides ease of timing control, a delay line without extra nonlinear-effects, and less hardware overhead.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: May 21, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Chulkyu Lee, Shih-Wei Chou, Ying Duan
  • Patent number: 10278130
    Abstract: Certain aspects of the present disclosure generally relate to enhanced procedures for search, measurement, and positioning with aid of motion detection information. According to certain aspects, a method is provided for wireless communications which may be performed, for example, by a user equipment (UE). The method generally includes determining one or more parameters of the UE; dynamically adjusting a periodicity of at least one of: cell search and measurements or global positioning system (GPS) signal acquisition based, at least in part, on the one or more parameters; and performing at least one of: the cell search and measurements or GPS signal acquisition according to the adjusted periodicity. In aspects, an enhanced technique for motion state detection is provided. The method may result in power savings, for example, when the UE is stationary and can reduce the periodicity that the UE performs search, measurement and GPS signal acquisition.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: April 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Yue Yang, Aziz Gholmieh, Arvind Vardarajan Santhanam, Srinivasan Balasubramanian, Frank Xiaoyu Hu, Huilin Xu, Xu Han, Ranjan Mohanty
  • Patent number: 10270498
    Abstract: An illustrative example embodiment of a detector device includes a receiver configured to receive radiation comprising a plurality of codes. Each of the codes is associated with one of a plurality of transmissions and each of the codes is distinct from the other codes. A processor is configured to obtain information corresponding to at least one predetermined phase code spectrum for the codes, determine a demodulated signal spectrum of radiation received by the at least one receiver, determine at least one characteristic of the determined demodulated signal spectrum, adjust the at least one predetermined phase code spectrum based on the determined characteristic to generate an adjusted phase code spectrum, and refine the determined demodulated signal spectrum based on the adjusted phase code spectrum to generate a refined demodulated signal spectrum.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: April 23, 2019
    Assignee: Aptiv Technologies Limited
    Inventor: Kan Fu
  • Patent number: 10263685
    Abstract: A radio receiver component includes a first antenna line for receiving a first signal and a second antenna line for receiving a second signal. Each of the first signal and the second signal is a respective intermediate frequency (IF) signal produced by down-converting a respective radio frequency (RF) signal received by a respective antenna. The first antenna line includes a demodulator that receives the first signal and down-converts the first signal to produce one or more baseband signals, one or more variable baseband delay paths that delay the one or more baseband signals, a modulator that receives the one or more delayed baseband signals and up-converts the one or more delayed baseband signals to produce a third IF signal. The radio receiver component further includes a combiner that receives and combines the second signal and the third signal to produce a fourth signal.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: April 16, 2019
    Assignee: ZTE CORPORATION
    Inventors: Andrey Kochetkov, Ying Shen, Shawn Walsh
  • Patent number: 10257862
    Abstract: The present invention generally relates to a random access method and apparatus based on analog network coding for a satellite network and, more particularly, to technology that combines analog network coding with random access, thus guaranteeing high channel usage efficiency upon utilizing the technology for a satellite positioning/communications convergence system. For this, a random access apparatus based on analog network coding for a satellite network according to an embodiment of the present invention includes a received signal determination unit, a data packet transmission unit, a reserved slot decision unit, a response message reception unit, and a data packet decoding unit.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: April 9, 2019
    Assignee: AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Jae Sung Lim, Hong Jun Noh, Kyu Man Lee
  • Patent number: 10243643
    Abstract: The embodiments of the present invention provide an array antenna beam adjustment device; before combining and analog-digital conversion, the array antenna beam adjustment device couples an N-way reception signal, and performs low-speed small-bandwidth analog-digital conversion on the N-way reception signal; according to the analog-digital converted signal, spatial filtering is performed and a filtering coefficient is adjusted; according to the filtering coefficient, the weight of the reception signal is adjusted, and thus the reception beam is adjusted. In the embodiments of the present invention, beam control is carried out according to the N-way reception signal, and the speed and flexibility of the beam control are greatly improved.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: March 26, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Rui Lyu
  • Patent number: 10211866
    Abstract: A technique, as well as select implementations thereof, pertaining to dual receive processing in wireless communications is described. The technique may involve receiving, by a plurality of receive processing modules, an incoming signal from an antenna to provide a plurality of processing results. The technique may also involve generating, by a determination mechanism, a determination output based on the plurality of processing results. The determination output may include either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing modules or a weighted combination of more than one respective processing result from more than one receive processing module of the plurality of receive processing modules. The technique may further involve decoding, by a decoder, the determination output to provide a decoded signal.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: February 19, 2019
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Jangwook Moon, Tze-Ping Low, Craig Burnet
  • Patent number: 10212638
    Abstract: Methods of combining semi-persistent resource allocation and dynamic resource allocation are provided. Packets, such as VoIP packets, are transmitted on the uplink and downlink using respective semi-persistent resources. For each mobile device, awake periods and sleep periods are defined. The semi-persistent resources are aligned with the awake periods so that most of the time the mobile device can turn off its wireless access radio during the sleep periods. In addition, signalling to request, and to allocate, resources for additional packets are transmitted during the awake periods, and the resources allocated for the additional packets are within the awake windows.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: February 19, 2019
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, James Earl Womack
  • Patent number: 10200976
    Abstract: A cell2 configured by only a DL CC2 being a resource for downlink is configured. The cell2 does not include a resource for uplink, that is, a UL CC to be associated with the DL CC2 by a DL/UL link. The link information indicating the above is notified a communication terminal device by a base station device using the DL CC2. A DL CC1 and a UL CC1 constitute a cell1. The downlink communication from the base station device to the communication terminal device is performed using the cell1 and the cell2, and the uplink communication from the communication terminal device to the base station device is performed using the cell1.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: February 5, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuru Mochizuki, Miho Maeda, Yasushi Iwane, Takayuki Nonami
  • Patent number: 10154488
    Abstract: Disclosed are a communication method of dynamically allocating subbands in a time-variant channel and a device therefor. In particular, the communication device using dynamically allocated subbands in a time-variant channel includes a subband allocation mode selection unit that selects any one of subband allocation modes based on a communication requirement; a channel estimation unit that performs channel estimation on a plurality of subbands based on the currently selected subband allocation mode; and a control unit that transmits channel estimation information on the subbands to a subband allocation device and is allocated at least one subband satisfying the communication requirement from the subband allocation device.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: December 11, 2018
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Sang Kook Han, Soo Min Kang
  • Patent number: 10136468
    Abstract: There is provided a control device including a communication unit configured to perform communication with a radio communication device of a radio communication system in which communication is possible using a plurality of access schemes including at least one of the access schemes of a multiple access scheme that uses orthogonal resources and a multiple access scheme that uses non-orthogonal resources, and a control unit configured to perform allocation of resources relating to the access schemes to be used by the radio communication device.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: November 20, 2018
    Assignee: SONY CORPORATION
    Inventors: Ryota Kimura, Ryo Sawai, Hiromasa Uchiyama, Sho Furuichi
  • Patent number: 10129053
    Abstract: A nonlinear equalizer for iteratively equalizing a data communication channel, which comprises a transmitter at the input of the channel, for transmitting data and one or more training sequences over the channel; a receiver at the output of the channel, for receiving the data and the one or more training sequences; a sampling circuit for sampling received data; a processor, for processing the samples. The processor is adapted to calculate the derivative of the MSE for each of the FFE taps; calculate the derivative of the variance of the enhanced noise with the FFE taps; iteratively update the FFE coefficients, while during each update, injecting samples of a known training sequence into the channel.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: November 13, 2018
    Assignee: MULTIPHY LTD.
    Inventor: Or Vidal
  • Patent number: 10091731
    Abstract: Disclosed is a method and apparatus to detect an intended packet by a sliding intermediate frequency (SIF) coherent ultra low power (ULP) wireless receiver. The method includes detecting a transition from a noise period to a signal period in a pair of input sequences received, dynamically adjusting a gain of the pair of input sequences in response to the signal period being initiated, distinguishing an intended packet from packets received in preambles included in the pair of input sequences, and compensating for a carrier frequency offset of the intended packet in the signal period.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: October 2, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ashutosh Deepak Gore, Sujit Jos, Jinesh P. Nair, Chang Soon Park, Kiran Bynam, Young Jun Hong
  • Patent number: 10020862
    Abstract: Wireless communication devices with multiple receive (RX) chains may be operated to maintain high performance while saving power. This may be accomplished by evaluating signal strength during transmission of the RX packets, and/or evaluating a possible imbalance (gain difference) between the multiple RX chains within the wireless communication device. Signal strength (or good signal) detection may be enabled when non-MIMO (non-multiple-in-multiple-out) transmissions are taking place, while imbalance detection (antenna gain comparison) may be enabled when a specified number of single-stream packets have been received. Once the decision has been made to operate in a reduced number RX path mode, decision to reactivate one or more additional RX paths may be made based on MIMO detection, a detection of a drop in signal quality, and/or upon expiration of a power save timer.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: July 10, 2018
    Assignee: Apple Inc.
    Inventors: Xiaowen Wang, Vinay R. Majjigi, Joonsuk Kim, Syed Aon Mujtaba
  • Patent number: 9984843
    Abstract: A method for detecting a latent failure mode in an electronic selector having an interface switch and at least two underlying switches includes tracking and counting each of the underlying switch's close/open status change counts in the context of tracking and counting the interface switch selection status change counts. The method continues by calculating the ratio of each underlying switch's close or open status change counts against the interface switch selection status change counts. By comparing these ratios from each underlying switch in respect to the interface switch selection status change counts, a set of new algorithms are formulated to detect an interface switch latent failure mode due to either one of the at least two underlying switches stuck to open or one of the at least two underlying switches chattering between close and open states at a relatively high frequency compared to the interface switch selection event.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: May 29, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Ming Zhao
  • Patent number: 9973364
    Abstract: In 60 GHz WiGig/IEEE 802.11ad, Orthogonal Frequency Division Multiplexing (OFDM) is used to achieve higher throughput. However, OFDM has one problem of high Peak-to-Average Power Ratio (PAPR) caused by the summing up of the large number of subcarriers. A high PAPR signal degrades the efficiency of power amplifier (PA) and may cause spurious emissions because of the PA non linearity. In order to reduce PAPR, Generalized Frequency Division Multiplexing (GFDM) which has the characteristics of both single carrier and multi carrier transmission has been studied. By introducing GFDM, the number of subcarriers can be decreased while still maintaining a high throughput.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: May 15, 2018
    Assignee: INTEL IP CORPORATION
    Inventors: Hidekazu Shimodaira, Ali Sadri, Joongheon Kim
  • Patent number: 9967039
    Abstract: A transceiver includes a transmission module for generating an output signal, a controller for controlling the transmission module to allow an output signal to have one of a first frequency and a second frequency, a reception module for controlling the controller to allow a control signal to be outputted based on completion information received from the outside. The transmission module outputs an output signal having a first frequency to perform human body communication. When the reception module receives completion information, the transmission module outputs an output signal having a second frequency in response to the control signal in order to perform wireless communication. The first frequency is lower than the second frequency.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: May 8, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung Eun Kim, Tae Wook Kang, Kwang Il Oh
  • Patent number: 9954633
    Abstract: The present application relates to a receiver for performing a decimation on a signal for pattern detection and a method of operating thereof. A frequency-domain decimator component and a pattern detector component arranged at the receiver are provided. The frequency-domain decimator component is coupled to at least one antenna to receive an input sequence of samples of the signal received at the at least one antenna. The frequency-domain decimator component is further configured to apply an anti-aliasing filter and to decimate the input sequence. The frequency-domain decimator component is further arranged to output the input sequence filtered and decimated as output sequence. The pattern detector component is coupled to the frequency-domain decimator component to receive the output sequence. The pattern detection component is further configured to perform a pattern detection based on cross-correlation values in frequency domain between the output sequence and predefined patterns.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: April 24, 2018
    Assignee: NXP USA, Inc.
    Inventor: Radu D. Pralea
  • Patent number: 9954641
    Abstract: The teachings relate to a method 100 performed in a network node 2 for determining a link adaptation parameter, SINRLA,i, for a wireless device 3. The network node 2 supporting a multi-antenna transmission mode comprising spatial multiplexing layers for transmission of data on a channel between the wireless device 3 and the network node 2. The method 100 comprises: determining 110 a channel covariance matrix H HH for the channel, wherein H is the channel matrix for the channel; approximating 120 a post-equalizer signal to interference plus noise ratio SINRapprox., for a spatial multiplexing layer i using the channel covariance matrix H HH; determining 130 an offset SINRoffset, i to be the difference between a received signal to interference plus noise ratio SINRreceived and the approximated post-equalizer signal to interference plus noise ration SINRapprox.,i, and determining 140 the link adaptation parameter SINRLA,i to be the approximated post-equalizer signal to interference plus noise ratio SINRapprox.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: April 24, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: David Sandberg, Mats Åhlander
  • Patent number: 9935799
    Abstract: Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S2(i) and S2(i+1) obtained from different data are transmitted at time i and time i+1 respectively. In contrast, as modulated signal A, modulated symbols S1(i) and S1(i)? obtained by changing the signal point arrangement of the same data are transmitted at time i and time i+1 respectively. As a result the reception quality can be changed intentionally at time i and time i+1, and therefore using the demodulation result of modulated signal A of a time when the reception quality is good enables both modulated signals A and B to be demodulated with good error rate performances.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: April 3, 2018
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Kiyotaka Kobayashi, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 9900036
    Abstract: A technique, as well as select implementations thereof, pertaining to dual receive processing in wireless communications is described. The technique may involve receiving, by a plurality of receive processing modules, an incoming signal from an antenna to provide a plurality of processing results. The technique may also involve generating, by a determination mechanism, a determination output based on the plurality of processing results. The determination output may include either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing modules or a weighted combination of more than one respective processing result from more than one receive processing module of the plurality of receive processing modules. The technique may further involve decoding, by a decoder, the determination output to provide a decoded signal.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: February 20, 2018
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Jangwook Moon, Tze-Ping Low, Craig Burnet
  • Patent number: 9859929
    Abstract: The present invention includes a noise variance estimation circuit for wireless communication. An embodiment of the noise variance estimation circuit includes: a first estimation unit operable to generate a first estimation signal according to a reception signal and a reference signal in which the reception signal is derived from the equivalent of the reference signal; a first noise reduction unit operable to generate a first noise reduction signal by performing a first noise reduction process to the first estimation signal; a second estimation unit operable to generate a second estimation signal according to the difference between the first estimation signal and the first noise reduction signal; and a second noise reduction unit operable to execute a noise reduction adjustment according to the second estimation signal and perform a second noise reduction process to the first estimation signal in which the noise reduction adjustment affects the second noise reduction process.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: January 2, 2018
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Jyun-Wei Pu, Chung-Yao Chang
  • Patent number: 9843378
    Abstract: A wireless transceiver contains a receiver and a transmitter. The receiver is operable in single-input single-output (SISO) mode as well as multiple-input multiple-output (MIMO) mode, and contains a pair of in-phase and quadrature signal processing chains and a baseband processor. In SISO mode, each of the processing chains in the pair is connected to receive a same modulated signal as input, and generates respective baseband outputs. The baseband processor processes the baseband outputs to demodulate the modulated signal. In MIMO mode, the signal processing chains in the pair receive different modulated signals and generate corresponding down-converted signals. The baseband processor processes the down-converted signals to demodulate the respective modulated signals received by the receiver. Corresponding techniques to provide MIMO in addition to SISO capabilities are implemented in the transmitter also.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: December 12, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Gregory Lerner, Nir E J Tal, Ronen Shaul Isaac, Roi Faust
  • Patent number: 9794023
    Abstract: A channelization code analyzer for determining active channelization codes includes a despreading unit configured to despread a received signal with a plurality of candidate channelization codes to generate a plurality of despreaded signals. The channelization code analyzer further includes a detector configured to detect from the plurality of despreaded signals a set of despreaded signals modulated with a predetermined first modulation scheme. A channelization code identification unit is configured to identify at least one active channelization code from the plurality of candidate channelization codes based on the detected set of despreaded signals. Further, a radio receiver apparatus, a second moment and fourth moment processing unit and a modulation scheme detector are described.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 17, 2017
    Assignee: Intel IP Corporation
    Inventor: Silvano Gori
  • Patent number: 9762273
    Abstract: Mechanisms for interferer detection can detect interferers by detecting elevated signal amplitudes in one or more of a plurality of bins (or bands) in a frequency range between a maximum frequency (fMAX) and a minimum frequency (fMIN). To perform rapid interferer detection, the mechanisms downconvert an input signal x(t) with a local oscillator (LO) to a complex baseband signal xI(t)+jxQ(t). xI(t) and xQ(t) are then multiplied by m unique pseudorandom noise (PN) sequences (e.g., Gold sequences) gm(t) to produce m branch signals for I and m branch signals for Q. The branch signals are then low pass filtered, converted from analog to digital form, and pairwise combined by a pairwise complex combiner. Finally, a support recovery function is used to identify interferers.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: September 12, 2017
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Peter R Kinget, John Wright, Rabia Tugce Yazicigil
  • Patent number: 9749103
    Abstract: A method for operating a transmission point with reduced interference includes determining a beamformed signal configuration specified in accordance with configuration information of neighboring TPs, wherein the beamformed signal configuration indicates multiplexed beamformed signals in a spatial domain and at least one of a time domain and a frequency domain, and transmitting beamformed signals in accordance with the beamformed signal configuration, wherein the beamformed signals comprises at least one of beamformed reference signals and beamformed control signals.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: August 29, 2017
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Richard Stirling-Gallacher, Bin Liu, Jian Wang
  • Patent number: 9749155
    Abstract: Provided is a method of blindly estimating WCDMA OVSF of a signal analyzer, which includes: (a) setting SF to 512 and an index thereof to 0; (b) calculating a power average value of a symbol obtained by despreading descrambled data with an OVSF code set by increasing the index from ‘0’ by ‘1’; (c) determining an OVSF code by which the power average value is equal to or greater than a power reference value as a used OVSF code candidate and determining an OVSF code by which the power average value is less than the power reference value as an unused OVSF code; (d) comparing a zero crossing rate of a symbol with a reference value to determine whether the OVSF code candidate is the used OVSF code; and (e) repeating (b) to (d) while reducing the SF half by half until the SF is equal to 4.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: August 29, 2017
    Assignee: INNOWIRELESS CO., LTD.
    Inventors: Jin Soup Joung, Joo Hyeong Lee, Yong Hoon Lim, Kyoung Hwan Ju
  • Patent number: 9743413
    Abstract: A method in a network node for enhancing a channel estimate based on a Dedicated Physical Control Channel, DPCCH, between a user node and the network node is provided. The DPCCH has a first power. The network node receives (501) the DPCCH. The first power of the DPCCH is boosted with additional power, resulting in a second power. The network node then obtains (502) a channel estimate based on the DPCCH comprising the second power. As soon as said channel estimate is obtained, the network node removes (503) the additional power from the DPCCH based channel estimate.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: August 22, 2017
    Assignee: Telefonatiebolaget LM Ericsson (Publ)
    Inventors: Erik Larsson, Michael Samuel Bebawy, Peter Von Wrycza, Yi-Pin Eric Wang
  • Patent number: 9730186
    Abstract: Functionality is described by selecting a channel in an environment in which non-privileged entities have subordinate access rights to spectrum compared to privileged entities. The functionality operates by identifying spectrum that is available to all nodes involved in communication (where the nodes are associated with non-privileged entities). The functionality then generates a suitability assessment for each candidate channel within the available spectrum. The functionality selects a channel having the most desirable suitability assessment. The functionality can form a suitability assessment for a candidate channel of arbitrary width, e.g., by combining suitability assessments associated with constituent spectrum units within the candidate channel.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: August 8, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Ranveer Chandra, Thomas Moscibroda, Rohan Narayana Murty, Paramvir Bahl
  • Patent number: 9706421
    Abstract: Aspects of the disclosure are directed to estimating a signal to interference ratio. A signal energy estimate corresponding to a received data transmission is generated. A noise to interference ratio estimate corresponding to the received data transmission is generated. A bias, corresponding to the noise to interference ratio estimate, is subtracted from the signal energy estimate. A signal to interference ratio estimate is determined corresponding to the signal energy estimate less the bias, and the noise to interference ratio estimate.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: July 11, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Wei Zhang, Sharif Ahsanul Matin, Feng Lu, Krishna Chaitanya Mukkera, Praveen Peruru
  • Patent number: 9698757
    Abstract: The ABB blocks 332, 334, 336, and 318 are configured to process the I/Q signals corresponding to the first or the second HB independently or the I/Q signals corresponding to the LB in cooperation by two. In detail, the first ABB I block 332 and the first ABB Q block 334 operate independently in the 3G/4G mode but they are configured to process the I signal (or Q signal) of the LB in the 2G mode. Likewise, the second ABB Q block 336 and the second ABB I block 318 operate independently in the 3G/4G mode but they are configured to process the Q signal (or I signal) of the LB in the 2G mode. The first ABB I/Q blocks 332 and 334 and the second ABB I/Q blocks 336 and 318 are arranged symmetrically to processing the I/Q signals cooperatively in the 2G mode.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: July 4, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byungki Han, Suseob Ahn, Jongwoo Lee
  • Patent number: 9686754
    Abstract: An onboard wireless communication apparatus 10 includes an in-vehicle informing processor that transmits information that enables a wireless set 20 to recognize that it is located inside a vehicle 100 to the wireless set 20 which is about to carry out wireless communication with a first wireless communication apparatus 11a serving as a communication partner, and which controls, when the wireless set 20 recognizes that it is located inside the vehicle 100, its transmit power in a manner preventing an excessive receiving power level of a second communication apparatus 11b that is carrying out, besides the first wireless communication apparatus 11a, wireless communication inside the vehicle 100 by a wireless communication technique using the same frequency band as the first wireless communication apparatus 11a.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: June 20, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hideki Fukuhara, Takeshi Mitsui, Yoshihiro Nakai, Hiroyuki Yokota
  • Patent number: 9685791
    Abstract: A system for controlling wireless power transfer to mobile devices is disclosed. The system includes a power transmitter configured to transmit power via a wireless coupling to the mobile devices. Each of the mobile devices includes a power receiver configured to receive the power from the power transmitter via the wireless coupling with the power transmitter. Each power receiver is configured to transmit control data modulated with a spreading code via the wireless coupling to the power transmitter.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: June 20, 2017
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventor: In-Soo Yoon
  • Patent number: 9686063
    Abstract: For an enhanced physical downlink control channel (EPDCCH), unlimited traffic-to-pilot ratio (TPR) variations across resource elements of a physical resource block (PRB) pair is problematic because of the detrimental affect the variations will have on the ability of a user equipment (UE) to perform inter-cell/intra-cell interference suppression (IS) and/or interference cancellation (IC) on EPDCCH of an interfering cell. A TPR limitation is placed on EPDCCH to facilitate IS/IC without causing practical limitations on EPDCCH management by an eNB. Accordingly, a method, an apparatus, and a computer program product for wireless communication are provided. The apparatus identifies a plurality of resource elements of at least one PRB pair for transmitting one or more control channels, divides the plurality of identified resource elements into one or more groups, and restricts a plurality of resource elements in a respective group to a TPR.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: June 20, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Tao Luo, Hao Xu, Taesang Yoo, Peter Gaal, Yongbin Wei, Durga Prasad Malladi
  • Patent number: 9673857
    Abstract: Techniques for frequency-hopping sequence-generation are described herein. In one example, a sequence of pseudo random numbers may be used to generate a scrambling sequence. The scrambling sequence may be used to map an unscrambled sequence of channels into a scrambled sequence of channels. Channel-repeats may be detected in the scrambled sequence of channels and resolved. Channel whitening may be performed to reduce channel overuse resulting from the channel-repeat resolutions. The scrambled sequence of channels may be provided to a radio to enable the radio to tune to the channels indicated by the scrambled sequence of channels.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: June 6, 2017
    Assignee: Itron Global SARL
    Inventor: Gilles Picard
  • Patent number: 9661548
    Abstract: A disclosure of the present specification presents a method for executing measurement including: measuring a first and a second logical cell of a base station and measuring a cell of a neighboring base station; and executing cell reselection according to a result of the measuring or transmitting a measurement report including the result of the measuring to the base station. In the method, since the base station operates the first logical cell in a first sub-frame set within a wireless frame and operates the second logical cell in a second sub-frame set within the wireless frame to which power backoff is applied, the measuring of the first logical cell by the base station may be executed in the first sub-frame set and the measuring of the second logical cell by the base station may be executed in the second sub-frame set to which the power-back off is applied.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: May 23, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Suhwan Lim, Yoonoh Yang, Sangwook Lee, Byounghoon Kim, Manyoung Jung, Jinyup Hwang
  • Patent number: 9648444
    Abstract: A method and apparatus for physically secure communication over machine-to-machine (M2M) networks is claimed, through the use of frequency-hop and random access spread spectrum modulation formats employing using truly random spreading codes and time/frequency hopping and receiver selection strategies at the transmitters in the M2M network, blind signal detection and linear signal separation techniques at the receivers in the M2M network, completely eliminating the ability for an adversary to predict and override M2M transmissions. Additional physical security protocols are also introduced that allow the network to easily detect and identify spoofing transmissions on uplinks and downlinks, and to automatically excise those transmissions as part of the despreading procedure, even if those transmissions are received at a much higher power level than the intended transmissions.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: May 9, 2017
    Inventor: Brian G. Agee
  • Patent number: 9628201
    Abstract: The present invention describes a new distributed decision making scheme for adaptive signal detection. The innovation describes an adaptive system and method for allocating signal detection resources that are used to find out the status of channel use (occupied/unoccupied). The system includes selection of suitable spectrum sensing methods and decision combining techniques as well as the associated parameters to meet the requirements set for the system in the specific operational environment. The result is that the system has good performance, simple implementation and is applicable to versatile time-variant situations.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: April 18, 2017
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Tapio Rauma, Marja Matinmikko