Quadrature Carriers Patents (Class 370/206)
  • Patent number: 9413503
    Abstract: A method and device for transmitting an uplink signal in a wireless communication system is provided. A user equipment transmits a physical uplink shared channel (PUSCH) on a SRS subframe for a first serving cell to a base station if a SRS transmission on the SRS subframe for the first serving cell is overlapped with an uplink transmission for a second serving cell. The PUSCH is transmitted on remaining orthogonal frequency division multiplexing (OFDM) symbols in the SRS subframe except a single OFDM symbol reserved for the SRS transmission regardless of whether a SRS is transmitted on the single OFDM symbol or not.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: August 9, 2016
    Assignee: LG Electronics Inc.
    Inventors: Joon Kui Ahn, Suck Chel Yang, Yun Jung Yi, Dong Youn Seo
  • Patent number: 9397739
    Abstract: A method operates to transmit a data signal by a transmission unit of a wireless multiple-input/multiple-output (MIMO) communication system. The communication system includes the transmission unit and a reception unit, the transmission unit having a plurality of transmission antennas and the reception unit having a plurality of reception antennas. The method includes performing a first transmission of a data signal, the first transmission including transmitting the data signal by each one of the plurality of transmission antennas, and performing a second transmission of the data signal at a time later than the first transmission, the second transmission including transmitting at least one spectrally modified signal variant of the data signal by at least one antenna of the plurality of transmission antennas.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: July 19, 2016
    Assignee: INTEL DEUTSCHLAND GMBH
    Inventors: Markus Mueck, Christian Drewes, Wen Xu
  • Patent number: 9397813
    Abstract: In a method of adapting a control channel in a network node in a communication system, providing (S20) a control format indicator for the control channel, and dynamically determining and providing (S10) control channel redefinition information, which control channel redefinition information together with said control format indicator provides a redefined control channel. Subsequently the control channel is adapted (S30) based on said control format indicator and said control channel redefinition information to provide a redefined control channel for signaling to said at least one user equipment, Finally, scheduling (S40) user equipment in a sub frame based on the redefined control channel.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: July 19, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON
    Inventors: Jonas Fröberg Olsson, Pål Frenger, John Skördeman
  • Patent number: 9385908
    Abstract: A communication apparatus comprises an inserter that inserts an element having a value of 0 or nearly 0 into a predetermined position of a modulated signal to generate inserted data; an operator that adds a pilot signal comprising a data series of which the elements at the positions corresponding to the predetermined positions in the modulated signal are multiplied by a first amplitude coefficient and the elements other than the elements multiplied by the first amplitude coefficient are multiplied by a second amplitude coefficient to the inserted data to generate a post-operation data; an IFFT unit that performs IFFT on the post-operation data; and a transmitter that generates a baseband signal based on the post-operation data on which the IFFT is performed and transmits a transmission signal generated from the baseband signal.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: July 5, 2016
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 9363053
    Abstract: Wireless communication wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. An encoding operation encodes and outputs transmitting data (bit string) and a bit converting operation converts at least one bit of a plurality of bits constituting a data symbol to be used for channel estimation, among the encoded bit strings, into ‘1’ or ‘0’. A modulating operation modulates the bit string inputted from the bit converting operation by using a single modulation mapper and a plurality of data symbols are generated.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: June 7, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Kenichi Miyoshi, Hidetoshi Suzuki, Katsuhiko Hiramatsu, Christian Wengerter, Alexander Golitschek Edler Von Elbwart
  • Patent number: 9363826
    Abstract: Disclosed in some examples is a method of channel access by a wireless device in a wireless network by determining whether there is network traffic associated with a preamble of a first type and whether there is network traffic associated with a preamble of a second type, wherein the wireless device is not capable of decoding the preamble of the second type, and wherein determining that there is network traffic associated with a preamble of the second type includes determining that an energy level of the channel is above a threshold for a period of time, the first and second preamble types being different lengths; and sending a packet with a preamble of the first type, responsive to determining that no network traffic is detected associated with the preamble of the second type or network traffic associated with a preamble of the first type for the period of time.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: June 7, 2016
    Assignee: Intel Corporation
    Inventors: Minyoung Park, Eldad Perahia, Thomas J Kenney, Emily H. Qi
  • Patent number: 9350400
    Abstract: A method for receiving and removing co-channel interference from one or more received signals that comprise different symbol or chipping rates can comprise receiving a first composite signal and a second composite signal. The method can also comprise sampling the first composite signal and the second composite signal at a particular sampling rate that is sufficient to recover signal data from both the first composite signal and the second composite signal. Further, the method can comprise estimating from the second composite signal an estimated cross-coupled second signal within the first composite signal. The estimated cross-coupled second signal is estimated from at least the second composite signal at the particular sampling rate. Further still, the method can comprise recovering a substantially decoupled first data signal by removing at least a portion of the co-channel interference caused by the estimated cross-coupled second signal from the composite first signal.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: May 24, 2016
    Assignee: L-3 Communications Corp.
    Inventors: David G. Landon, Osama S. Haddadin
  • Patent number: 9344171
    Abstract: Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N?1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: May 17, 2016
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 9325424
    Abstract: An optical phase compensation device included in an optical receiver employing an intradyne detection method, includes a first optical phase error calculator configured to calculate a first optical phase error by averaging signal symbols of a first number of input main signals, a second optical phase error calculator configured to calculate a second optical phase error by averaging signal symbols of a second number of the main signals, wherein the second number is smaller than the first number, and a subtractor configured to subtract, from optical phase components of the main signals, one of a difference between the first optical phase error and the second optical phase error and a value obtained by multiplying the difference by a gain relative to the difference.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: April 26, 2016
    Assignee: FUJITSU LIMITED
    Inventor: Noriaki Mizuguchi
  • Patent number: 9325532
    Abstract: A method and apparatus are provided for transmitting one or more symbols in a multiple antenna wireless communication system. Subcarriers from one or more symbols are interleaved across a plurality of antennas. The symbols may be, for example, long or short training symbols based on a single-antenna long or short training symbol, respectively, and wherein each subsequent subcarrier from the single-antenna training symbol is positioned in a training symbol for a logically adjacent antenna. One or more additional subcarriers may be inserted in at least one of the plurality of symbols to allow nulled subcarriers to be estimated using an interpolation-based channel estimation technique. The remaining portions of a header, as well as the data sequences of a packet, may also be diagonally loaded.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: April 26, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Jan Boer, Bas Driesen, Tim Schenk, Allert Van Zelst
  • Patent number: 9313003
    Abstract: The present invention relates a method in which a base station transmits a downlink signal by using a plurality of layers comprises the steps of: multiplexing and transmitting dedicated reference signals for the plurality of layers on the basis of a reference signal pattern, wherein 24 resource element positions comprised in the reference signal pattern are set as 6 groups, the 6 groups are set as 2 high-level groups, the reference signal for the plurality of layer is split and placed in the 2 high-level groups, and the reference signal for 2 or more layers placed in the same group is subjected to code-division multiplexing.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: April 12, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyun Soo Ko, Jae Hoon Chung, Bin Chul Ihm, Moon Il Lee, Seung Hee Han
  • Patent number: 9306676
    Abstract: A receiver architecture and method recovers data received over an optical fiber channel in the presence of cycle slips. In a first cycle slip recovery architecture, a receiver detects and corrects cycle slips based on pilot symbols inserted in the transmitted data. In a second cycle slip recovery architecture, a coarse cycle slip detection is performed based on pilot symbols and a cycle slip position estimation is then performed based on carrier phase noise. The receiver compensates for cycle slips based on the position estimation.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: April 5, 2016
    Assignee: ClariPhy Communications, Inc.
    Inventors: Mario Alejandro Castrillon, Damian Alfonso Morero, Mario Rafael Hueda
  • Patent number: 9300410
    Abstract: A process and apparatus (called Receiver Calibration) are described, that allows the determination of responses of a receiver to signals, the property values of which are known. The signals with known property values are supplied to the receiver via guided waves, i.e. in a controlled environment. The Receiver Calibration is suitable for calibration of a wide variety of devices.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: March 29, 2016
    Inventor: Steven Ray Hessel
  • Patent number: 9253291
    Abstract: Systems, methods, and devices for wireless communication. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a receiver configured to receive a wireless signal comprising a packet. At least a portion of the wireless signal may be received over a channel with a channel bandwidth of at least approximately five hundred megahertz. The packet may be formed from at least one orthogonal frequency-division multiplexing (OFDM) symbol comprising at least one hundred and twenty-eight tones. The apparatus further comprises a processor configured to evaluate the wireless signal. The processor may comprise a transform module configured to convert the at least one OFDM symbol into a frequency domain signal.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: February 2, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Rahul Tandra, Gwendolyn Denise Barriac, Sameer Vermani, Hemanth Sampath
  • Patent number: 9246621
    Abstract: A system including a first gain module and a second gain module. The first gain module is configured to receive first signals generated based on a plurality of data streams mapped to a plurality of antennas including a first antenna and a second antenna, and to apply a first gain corresponding to the first antenna to the first signals. The second gain module is configured to receive second signals generated based on the plurality of data streams, and to apply a second gain corresponding to the second antenna to the second signals. The second signals are different than the first signals. The second gain is different than the first gain.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: January 26, 2016
    Assignee: Marvell International LTD.
    Inventors: Jungwon Lee, Hui-Ling Lou
  • Patent number: 9232508
    Abstract: A method for transmitting uplink response signals, base station, mobile station and communication system, includes judging whether to use a downlink secondary component carrier to transmit data to a mobile station; if the judging result is positive, allocating resources according to the number of transmission blocks for transmitting the downlink data in the secondary component carrier, accordingly the mobile station is able to use the resources corresponding to a preconfigured primary component carrier and the resources allocated to the secondary component carrier to select uplink resources for transmitting response signals.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: January 5, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yuantao Zhang, Yi Zhang, Yuanrong Lan, Hua Zhou, Jianming Wu
  • Patent number: 9230505
    Abstract: Techniques and mechanisms for exchanging communications which each represent a respective combination of data and clock signaling. In an embodiment, encoder logic generates a first signal pair, including encoding a first differential data signal pair with a first clock signal of a differential clock signal pair. The encoder logic further generates a second signal pair, including encoding a second differential data signal pair with a second clock signal of the same differential clock signal pair. In another embodiment, decoder logic receives and decodes the first signal pair and the second signal pair, wherein the decoding generates the first differential data signal pair, the second differential data signal pair and a clock signal.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: January 5, 2016
    Assignee: Lattice Semiconductor Corporation
    Inventors: Daekyeung Kim, Daeyun Shim, Baegin Sung
  • Patent number: 9220112
    Abstract: The present invention provides a signal sending method, device, and system. The method includes: A sender performs signal multiplexing processing on a first service data block in service data blocks to be sent and uplink control information, and performs channel interleaving processing on mixed data generated after the signal multiplexing processing, to generate a mixed data block; the sender performs signal spatial multiplexing processing on the mixed data block and remaining service data blocks in the service data blocks to be sent except the first service data block to generate a spatially multiplexed signal, and then sends the spatially multiplexed signal to a receiver through a PUSCH channel. The present invention solves the problem of signal transmission over the PUSCH channel after a MIMO technique is introduced in an LTE-A system.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: December 22, 2015
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhengwei Gong, Qi Li
  • Patent number: 9197473
    Abstract: A wireless communication device (‘device’) is configured to generate an OFDM/A packet that includes at least one OFDM/A symbol that includes at least one SIG having SIG information modulated on only even (or odd) sub-carriers and does not include any information modulated on odd (or even) sub-carriers of a set of OFDM/A sub-carriers. The set of OFDM/A sub-carriers may be all or less than all of available sub-carriers. The device may generate the packet to include a preamble and a payload such that the payload, which may be composed of at least one additional OFDM/A symbol, includes data modulated on some or all of the sub-carriers of the set of OFDM/A sub-carriers. The device can modulate and transmit SIG information and data differently within the preamble and the payload (e.g., with higher ordered modulation or MCS for the data and less power per sub-carrier than for the preamble).
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: November 24, 2015
    Assignee: Broadcom Corporation
    Inventors: Ron Porat, Nihar Jindal
  • Patent number: 9178550
    Abstract: Methods and systems for mitigating interference or estimating a covariance matrix in a communication system are disclosed. A method of demodulating a received signal in a communication system can include receiving a first plurality of waveforms, estimating a covariance matrix based on the first plurality of waveforms, determining a spatial filter based on the estimated covariance matrix, receiving a second plurality of waveforms, generating at least one filtered waveform by applying the spatial filter to the second plurality of waveforms, and demodulating the at least one filtered waveform.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: November 3, 2015
    Assignee: Silvus Technologies, Inc.
    Inventors: Anish Narendra Shah, Weijun Zhu, Babak Daneshrad
  • Patent number: 9172575
    Abstract: The present invention provides a correlator and a demodulation device including, first and second filter sections having different non-overlapping pass-frequency characteristics, first and second delay circuits that delay the signals output from the first and second filter section by one effective OFDM symbol period, first and second complex conjugate circuits that take the complex conjugates of the delayed signals, first and second complex operation sections that compute the complex-multiplies of the signals from the first and second filter sections and the respective signals for the first and second complex conjugate circuits, first and second moving average processing sections that take moving averages of GI lengths, proportion determination circuit that compares the maximum values of the autocorrelations from each of the first and second moving average processing circuits, and selection-combination circuit that selects the autocorrelation having the largest maximum value based on the comparison result.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: October 27, 2015
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventor: Hiroji Akahori
  • Patent number: 9173127
    Abstract: A multi-carrier communication system such as an OFDM or DMT system has nodes which are allowed to dynamically change their receive and transmit symbol rates, and the number of carriers within their signals. Changing of the symbol rate is done by changing the clocking frequency of the nodes' iFFT and FFT processors, as well as their serializers and deserializers. The nodes have several ways of dynamically changing the number of carriers used. The selection of symbol rate and number of carriers can be optimized for a given channel based on explicit channel measurements, a priori knowledge of the channel, or past experience. Provision is made for accommodating legacy nodes that may have constraints in symbol rate or the number of carriers they can support.
    Type: Grant
    Filed: November 22, 2014
    Date of Patent: October 27, 2015
    Assignee: The Connectivity Patent Trust
    Inventor: William J. McFarland
  • Patent number: 9171485
    Abstract: A system is described for processing data of at least one location aware devices for obtaining geo-information. The system comprises an input means for obtaining vector-based data from at least one location aware devices, a data processor for inserting information from the vector-based data into a raster-based data structure so as to derive geo-information based on the raster-based data structure. A corresponding method as well as corresponding computer program products also are described.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: October 27, 2015
    Assignee: UNIVERSITEIT GENT
    Inventors: Sidharta Gautama, Rik Bellens
  • Patent number: 9172400
    Abstract: Techniques are presented herein to encode information bits. The information bits are partitioned into at least two groups based on inherent reliability and immunity to channel impairments of the respective bits. Each of the groups of information bits is encoded with a different coding strength. The resulting code word may be stored in a storage media or transmitted in a communication channel.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: October 27, 2015
    Assignee: Cisco Technology, Inc.
    Inventor: Hang Jin
  • Patent number: 9154281
    Abstract: Methods and apparatus are provided for inserting data symbols and pilot symbols in an OFDM (orthogonal frequency division multiplexing) transmission resource utilizing frequency hopping patterns for the data symbols and/or the pilot symbols. Data symbols and pilot symbols are allocated for down link (base station to mobile station) and up link (mobile station to bases station) transmission resources in a two-dimensional time-frequency pattern. For each antenna of a MIMO-OFDM (multiple input multiple output OFDM) communication system, pilot symbols are inserted in a scattered pattern in time-frequency and data symbols are inserted in an identical frequency-hopping pattern in time-frequency as that of other antennas.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: October 6, 2015
    Assignee: BlackBerry Limited
    Inventors: Jianglei Ma, Ming Jia, Peiying Zhu, Wen Tong
  • Patent number: 9154348
    Abstract: A method for improving communication sensitivity by a wireless communication device is described. The method includes obtaining a string of bits. The method also includes mapping each bit in the string of bits to a pre-allocated bit pattern to create a series of concatenated pre-allocated bit patterns. The method further includes generating a modulated signal based on the series. The method additionally includes transmitting the modulated signal.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: October 6, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: RaviKiran Gopalan, Le Nguyen Luong
  • Patent number: 9154274
    Abstract: Techniques to use OFDM symbols of different sizes to achieve greater efficiency for OFDM systems. The system traffic may be arranged into different categories (e.g., control data, user data, and pilot data). For each category, one or more OFDM symbols of the proper sizes may be selected for use based on the expected payload size for the traffic in that category. For example, control data may be transmitted using OFDM symbols of a first size, user data may be transmitted using OFDM symbols of the first size and a second size, and pilot data may be transmitted using OFDM symbols of a third size or the first size. In one exemplary design, a small OFDM symbol is utilized for pilot and for transport channels used to send control data, and a large OFDM symbol and the small OFDM symbol are utilized for transport channels used to send user data.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: October 6, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Jay Rod Walton, John W. Ketchum, Mark Wallace, Steven J. Howard
  • Patent number: 9137762
    Abstract: Provided are a method for transmitting an uplink and a wireless device. The wireless device decides a first wireless resource through which a sounding reference signal (SRS) will be transmitted from a first serving cell, and decides a second wireless resource through which an uplink channel will be transmitted from a second service cell. When all or a portion of the first wireless resource and the second wireless resource overlap, and a total transmission power with respect to the SRS and the uplink channel from the overlapping wireless resources exceeds a predetermined maximum transmission power, the wireless device drops the transmission of the SRS and transmits the uplink channel through the second wireless resource from the second service cell.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: September 15, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Joon Kui Ahn, Suck Chel Yang, Yun Jung Yi, Dong Youn Seo
  • Patent number: 9130705
    Abstract: A method for transmitting high rate data within a multiple input multiple output (MIMO) wireless local area network (WLAN) begins by determining a data transmission rate. The method continues by, when the data transmission rate is between a first data rate and a second data rate, enabling two transmission paths. The method continues by, for each of the two transmission paths, determining at least one of: level of constellation, number of data subcarriers, rate code, and cyclic prefix duration.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: September 8, 2015
    Assignee: Broadcom Corporation
    Inventor: Christopher J. Hansen
  • Patent number: 9125175
    Abstract: A transmission method for Multicast Broadcast Single Frequency Network (MBSFN) is described, which can realize the multiplexing of Multimedia Broadcast/Multicast Service (MBMS) services with different Modulation and Coding Scheme (MCS)/Service Data Unit (SDU) error rates. The method comprises dividing a plurality of services to be transmitted into multiple service groups according to error rates, each service group including at least one service, and transmitting the plurality of services according to the service groups, wherein the respective services in each service group are transmitted in turn according to a predetermined sequence. In this manner, MBMS services having different MCS/SDU error rates can be multiplexed and transmitted to UEs in the MBSFN.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: September 1, 2015
    Assignee: Alcatel Lucent
    Inventors: Yu Chen, He Wang
  • Patent number: 9119091
    Abstract: A multi-carrier communication system such as an OFDM or DMT system has nodes which are allowed to dynamically change their receive and transmit symbol rates, and the number of carriers within their signals. Changing of the symbol rate is done by changing the clocking frequency of the nodes' iFFT and FFT processors, as well as their serializers and deserializers. The nodes have several ways of dynamically changing the number of earners used. The selection of symbol rate and number of earners can be optimized for a given channel based on explicit channel measurements, a priori knowledge of the channel, or past experience. Provision is made for accommodating legacy nodes that may have constraints in symbol rate or the number of carriers they can support.
    Type: Grant
    Filed: November 22, 2014
    Date of Patent: August 25, 2015
    Assignee: The Connectivity Patent Trust
    Inventor: William J. McFarland
  • Patent number: 9118443
    Abstract: An approach is provided for high penetration alerting in a mobile satellite system. A message is generated for transmission to a wireless terminal. The message is partitioned into a number of symbols, each symbol composed of a portion of the message. The symbols are encoded via FEC coding to generate outer coded symbols, and each outer coded symbol is encoded based on a corresponding binary orthogonal sequence. The inner coded symbols are modulated based on a binary modulation scheme, and pulse shaped to generate message bursts for transmission to the wireless terminal. Each message burst reflects a group of the inner coded symbols, wherein the grouping of the inner coded symbols facilitates joint sequence detection by the wireless terminal, and each message burst exhibits relatively low peak-to-average power ratio.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: August 25, 2015
    Assignee: Hughes Network Systems, LLC
    Inventors: James Jehong Jong, Harish Ramchandran, Jun Wang, Channasandra Ravishankar
  • Patent number: 9107240
    Abstract: An amplifier and an amplifying method are provided. The amplifier includes: an amplifying unit amplifying and transferring a transmission target signal to a TDD switch; the TDD switch transferring a signal received from the amplifying unit to a filter unit when the amplifier operates in a TDD mode, and transferring a signal received from the filter unit to a duplex mode selection switch; the duplex mode selection switch transferring a signal received from the filter unit to a receiving side; and a controller controlling the duplex mode selection switch to transfer the signal received from the filter unit to the receiving side without passing through the TDD switch when the received duplex mode selection signal is a FDD mode selection signal.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: August 11, 2015
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Jong Hyun Lee
  • Patent number: 9094988
    Abstract: Methods and apparatus are described herein for synchronizing timing when using a secondary component carrier (SCC) in a carrier aggregated wireless network. A user equipment (UE) may determine that it is out of synchronization with respect to an SCC used to communicate with a network element. The UE may inform the network element of the out of synchronization status, and may perform a random access procedure to synchronize the timing.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: July 28, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Jelena M. Damnjanovic, Peter Gaal, Wanshi Chen, Aleksandar Damnjanovic, Masato Kitazoe
  • Patent number: 9042212
    Abstract: Method and apparatus for progressive preamble transmission in a communication system, such as a wireless system, is disclosed. In particular, a first symbol is utilized to communicate first timing information for coarse timing acquisition. A second symbol communicates first information including network identification information concerning a first network for fine timing acquisition of symbols in the first network. If a second network data is desired, a progressive or selectively utilizable third symbol communicates second information including network identification information concerning a second network. The network identification information concerning the second network includes network identification information concerning the first network to minimize processing to determine fine timing acquisition for the second network data.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: May 26, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Michael Mao Wang
  • Patent number: 9031155
    Abstract: A method and an apparatus for sending signals to suppress outband interference effectively in a simple way includes: grouping subcarriers in a spectrum into edge subcarriers of the spectrum and non-edge subcarriers of the spectrum; precoding data to be sent to obtain modulated symbols of the data on the subcarriers, where the precoding makes every two adjacent edge subcarriers of the spectrum in the edge subcarriers of the spectrum carry a pair of modulated symbols with opposite polarities, and makes each of the non-edge subcarriers of the spectrum carry a modulated symbol with no polarity; and sending the modulated symbols of the data on the subcarriers. The embodiments of the present invention are applicable to a signal sending process.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: May 12, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Guolin Sun, Xiangwei Zhou, Wei Jiang
  • Patent number: 9007900
    Abstract: Disclosed is a wireless backhaul network for a communications system. The network comprises a congregate node connected to the communications system; a plurality of access points, each access point having associated amounts of incident bidirectional traffic to be conveyed to and from the congregate node; and a plurality of bidirectional wireless links adapted to convey the traffic between the access points and the congregate node. The congregate node is configured to allocate spectrum to each directional component of each link within a predetermined available spectrum for the conveyance of the traffic, wherein the allocation is dependent on the amounts of traffic at the respective access points.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: April 14, 2015
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: Iain Bruce Collings, Wei Ni
  • Patent number: 9008167
    Abstract: Logic may comprise a single phase tracking implementation for all bandwidths of operation and the logic may adaptively change pre-defined and stored track parameters if the receiving packet is 1 MHz bandwidth. Logic may detect a packet and long training fields before performing a 1 MHz classification. Logic may auto-detect 1 MHz bandwidth transmissions by a property of the long training field sequences. Logic may auto-detect 1 MHz bandwidth transmissions by detecting a Binary Phase Shift Keying (BPSK) modulated first signal field symbol rather than the Quadrature Binary Phase Shift Keying (QBPSK) associated with the 2 MHz or greater bandwidth transmissions. Logic may perform an algorithm to determine an estimated phase correction value for a given orthogonal frequency division multiplexing symbol and several embodiments integrate this value with an intercept multiplier that may be 0.2 for 1 MHz transmissions and, e.g., 0.5 for 2 MHz or greater bandwidth communication.
    Type: Grant
    Filed: December 29, 2012
    Date of Patent: April 14, 2015
    Assignee: Intel Corporation
    Inventors: Shahrnaz Azizi, Eldad Perahia, Thomas J. Kenney
  • Patent number: 9008201
    Abstract: When a UE (12) is configured with MF-HSDPA and HARQ-ACK information associated with cells (14, 16) (characterized by potentially different downlink timing) is jointly encoded, only part of the existing Rel-9 HARQ-ACK codebook is reused. In one embodiment, only the codebook conflict arising from reuse of encodings is resolved. This is achieved by introducing a new codeword for at least one of the HARQ-ACK code words that are used multiple times in the existing Rel-9 codebook. In another embodiment, all codewords in the Rel-9 HARQ-ACK codebook having a Hamming distance smaller than a predetermined value (but not all codewords) are replaced. In yet another embodiment, all codewords in the Rel-9 HARQ-ACK codebook having a Hamming distance smaller than a predetermined value (but not all codewords) that would cause ambiguity at the NodeB receiver (i.e. where the interpretation of the HARQ-ACK information for one cell (14) depends on the number of streams transmitted at the other cell (16)) are replaced.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: April 14, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Johan Hultell, Peter von Wrycza
  • Patent number: 9009560
    Abstract: An apparatus includes a circuit configured to at least one of (i) encode first data to produce encoded data or (ii) decode second data to produce decoded data. The circuit is configured to operate according to a predetermined matrix. The predetermined matrix is represented by a two-dimensional grid of elements. Each element of the predetermined matrix labeled with a hyphen corresponds to a zero matrix. Each element of the predetermined matrix labeled with a number corresponds to a respective cyclic-permutation matrix.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: April 14, 2015
    Assignee: Marvell International Ltd.
    Inventors: Adina Matache, Heng Tang, Gregory Burd, Aditya Ramamoorthy, Jun Xu, Zining Wu
  • Patent number: 8988979
    Abstract: In a method for generating a data unit, a signal field is generated to include a first subfield having one of: a length indication to indicate a number of bytes in a data portion of the data unit, or a duration indication to indicate a number of OFDM symbols in the data portion of the data unit and a second subfield to indicate whether the first subfield includes the length indication or the duration indication. When the first subfield includes the length indication, one or more padding bits are added to a set of information bits according to a first padding scheme. When the first subfield includes the duration indication, one or more padding bits are added to the set of information bits to according to a second padding scheme. Padded information bits are encoded, and the data unit is generated to included the encoded information bits.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: March 24, 2015
    Assignee: Marvell World Trade Ltd.
    Inventors: Sudhir Srinivasa, Hongyuan Zhang, Yong Liu
  • Patent number: 8928170
    Abstract: A receiver and method for a transponder of a two-way automatic communications system (TWACS) used by an electrical utility in which analog outbound messages are sent from the utility to a consumer and inbound, reply messages are sent from the consumer to the utility. The receiver and method enable a transponder to detect the outbound messages and include A/D conversion and digital processing for demodulating a digitized signal and providing the outbound message.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: January 6, 2015
    Assignee: Aclara Technologies LLC
    Inventor: David W. Rieken
  • Patent number: 8917584
    Abstract: Systems and methods are provided for computing a relative path delay between multiple transmitting source to select a source that is closest to a receiving device. Preamble sequences unique to each source are received by a receiving device. The receiving devices determines based on a channel estimation or differential algorithm which transmitting source is closer to the receiving device. The channel estimation algorithm computes the path delay based on a channel estimation correlation at different preamble sequence indices. The differential algorithm computes the path delay based on a correlation between the received and transmitted preamble sequences at different preamble sequence indices. The receiving device selects the closer of the multiple sources to be the source from which to extract data.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: December 23, 2014
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Jiwoong Choi, Jihwan P. Choi
  • Patent number: 8908784
    Abstract: Data may be transmitted from a RAN node to a wireless terminal using a MIMO antenna array. A plurality of unmapped symbol blocks may be generated. Symbols of a first one of the plurality of unmapped symbol blocks may be mapped to first and second mapped symbol blocks so that the first mapped symbol block includes symbols of the first unmapped symbol block and so that the second mapped symbol block includes symbols of the first unmapped symbol block. The symbols of the first and second mapped symbol blocks may be precoded to provide precoded symbols of respective first and second MIMO precoding layers using a MIMO precoding vector. Each of the precoded symbols of the first and second MIMO precoding layers may be transmitted through the MIMO antenna array to the wireless terminal using a same TFRE. Related devices and terminals are also discussed.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: December 9, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Sairamesh Nammi, Bo Göransson, Erik Larsson
  • Patent number: 8908491
    Abstract: The invention relates to a method for evaluating the usability of a sub-carrier of a BPL (broadband power-line) signal, in particular in order to avoid mutual influencing of the BPL signal and a further signal, wherein the BPL signal has a plurality of sub-carriers and one symbol can be transmitted in each of the sub-carriers. The method comprises the following steps: extracting a received value y[k] from a sub-carrier of a received BPL signal, rectifying the received value y[k] using an estimated transfer function ? of the transmission channel, deciding on a symbol d[k] that is coded in the received value y[k], distorting the symbol d[k] using the estimated transfer function ? of the transmission channel, calculating a difference between the received value y[k] and the processed signal d[k]·? and deciding on the usability of the sub-carrier on the basis of the difference y[k]?d[k]·?.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: December 9, 2014
    Assignee: Power Plus Communications AG
    Inventors: Hans-Juergen Ehrlich, Markus Rindchen
  • Patent number: 8903021
    Abstract: For channel estimation in a spectrally shaped wireless communication system, an initial frequency response estimate is obtained for a first set of P uniformly spaced subbands (1) based on pilot symbols received on a second set of subbands used for pilot transmission and (2) using extrapolation and/or interpolation, where P is a power of two. A channel impulse response estimate is obtained by performing a P-point IFFT on the initial frequency response estimate. A final frequency response estimate for N total subbands is derived by (1) setting low quality taps for the channel impulse response estimate to zero, (2) zero-padding the channel impulse response estimate to length N, and (3) performing an N-point FFT on the zero-padded channel impulse response estimate. The channel frequency/impulse response estimate may be filtered to obtain a higher quality channel estimate.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: December 2, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Ashok Mantravadi, Aamod Dinkar Khandekar, Edward Harrison Teague, Tamer A. Kadous
  • Patent number: 8897120
    Abstract: A transmitting apparatus for transmitting signals in a multi carrier system on the basis of a frame structure, each frame comprising at least two preamble patterns adjacent to each other in the frequency direction and at least two data patterns, said transmitting apparatus comprising a pilot mapper configured to map the same sequence of pilot signals on frequency carriers of each of said at least two preamble patterns in a frame, each preamble pattern having the same length, a data mapper configured to map data on frequency carriers of said at least two data patterns in a frame a transformer configured to transform said preamble patterns and said data patterns from the frequency domain into the time domain in order to generate a time domain transmission signal, and a transmitter configured transmit said transmission signal.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: November 25, 2014
    Assignee: Sony Corporation
    Inventors: Lothar Stadelmeier, Dietmar Schill, Samuel Asangbeng Atungsiri, Antonio Alarcon Gonzalez
  • Patent number: 8891557
    Abstract: Techniques for transmitting information in a wireless network are described. In an aspect, information may be conveyed based on specific resources used to send a signal, e.g., a pilot. A pseudo-random function may receive the information to convey via the signal and possibly other information and may provide pseudo-random values, which may be used to select the resources to use to send the signal. In one design, a transmitter (e.g., a base station for a sector) may determine first information (e.g., a sector ID) to convey via a pilot and may also determine second information for absolute time (e.g. a pilot cycle index). The transmitter may determine resources (e.g., slots) to use to send the pilot based on the first and second information and possibly based further on a PN offset assigned to the sector. The transmitter may transmit the pilot in the determined resources.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: November 18, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Peerapol Tinnakornsrisuphap, Qiang Wu
  • Publication number: 20140313876
    Abstract: Embodiments of the present invention provide a transmission method. The method includes: performing sending of a near-end orthogonal frequency division multiplexing signal and receiving of a far-end orthogonal frequency division multiplexing signal simultaneously on an orthogonal frequency division multiplexing channel; obtaining a carrier phase difference between an echo orthogonal frequency division multiplexing signal and the far-end orthogonal frequency division multiplexing signal, and a channel transfer function of an near-end echo channel; and generating an echo cancellation signal according to the carrier phase difference, the channel transfer function of the near-end echo channel, and a near-end signal to be sent, and overlapping the echo cancellation signal and a received signal to cancel the echo orthogonal frequency division multiplexing signal that is overlapped in the received signal.
    Type: Application
    Filed: June 30, 2014
    Publication date: October 23, 2014
    Inventor: Cao Shi
  • Patent number: RE45269
    Abstract: In an OFDM transmission a transmission diversity technique is used without orthogonal signaling. The phases of the subcarriers received at the different antennas are compared by different techniques and then the phases of the signals for different antennas are adjusted for a subsequent transmission over the OFDM interface. The phase (and optionally amplitude) adjustment is calculated in only one (transmitting) side and no orthogonal signaling required. The number of antennas can be increased as much as necessary to get a sharper beam. The negative effects of fading and interference can be reduced so that at same time a down link transmission power can be reduced.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: December 2, 2014
    Assignee: Sony Deutschland GmbH
    Inventor: Seiichi Izumi