Generalized Orthogonal Or Special Mathematical Techniques Patents (Class 370/203)
  • Patent number: 9629142
    Abstract: The present invention discloses a method for indicating resource assignment, comprising: obtaining, by a network side device, the number N0 of a resource block RB that the network side device can assign to one UE and the one UE can schedule in maximum; calculating, by the network side device, a resource indication value RIV according to the number N0 of the RB the network side device can assign to the UE and the UE can schedule in maximum and the number NRB of resource blocks corresponding to a bandwidth the network side device can assign to all UEs for use; and sending the calculated resource indication value RIV to the one user equipment. In contrast to the prior art, it may save the number of bits used by the resource indication and lower signaling cost.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: April 18, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wen Zhang, Yongxia Lv
  • Patent number: 9628214
    Abstract: The following is directed to control and data channel interference cancellation between a serving cell and interfering cell. A first symbol of a subframe is processed to determine a control span of a serving cell and a control span of an interfering cell. The interference is then cancelled based on the determined control spans.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: April 18, 2017
    Assignee: QUALCOMM INCORPORATED
    Inventors: Tao Luo, Taesang Yoo, Lu Zhao, Yongbin Wei, Durga Prasad Malladi
  • Patent number: 9621389
    Abstract: The present disclosure relates to a method to introduce complementing training symbols into a 802.11p OFDM frame in vehicular communications, wherein a transmitter sends encrypted information from a first unit to a receiver of a specific second unit or a respective receiver of a number of second units and wherein fixed training symbols, which are implemented in a transmitter chip, are multiplexed with the information and transmitted to the receiver for channel estimation at the receiver side. In order to improve channel estimation complementing training symbols are inserted at the transmitter side immediately after an LLC sub-layer, where the LLC sub-layer is software defined and can be modified. It also relates to a receiver for exploiting the inserted complementing training symbols in order to improve channel estimation in 802.11 p OFDM vehicular communications, which is arranged to reproduce the complementing training symbols inserted in accordance with the method.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: April 11, 2017
    Assignee: VOLVO CAR CORPORATION
    Inventors: Keerthi Nagalpur, Fredrik Brannstrom, Erik G. Strom
  • Patent number: 9614556
    Abstract: Data transfer devices and methods for transferring data between first and second circuits are disclosed. A data transfer device includes a first circuit having a plurality of data channels, wherein at least one of the data channels is an active data channel. A serializer has a plurality of inputs and an output, wherein the inputs are coupled to the plurality of data channels. The serializer is for coupling only one active channel at a time to the output. An isolation barrier is coupled to the output of the serializer, the isolation attenuates transients and passes the fundamental frequency. A second circuit includes a deserializer having an input and at least one output, the input is coupled to the isolation barrier, the at least one output is at least one active data channel.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: April 4, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Mark W. Morgan, Swaminathan Sankaran, Bradley Allen Kramer
  • Patent number: 9615397
    Abstract: Certain aspects of the present disclosure provide techniques and apparatus for efficiently managing groups of stations (STAs) receiving simultaneous transmissions in a multiuser multiple-input multiple-output (MU-MIMO) scheme. One example method generally includes; for a first apparatus in a number of groups of apparatuses, allocating a first spatial stream position for each of at least one first group in the number of the groups; and transmitting a first unicast message to the first apparatus, wherein the first unicast message comprises an indication of the allocated spatial stream position for each of the at least one first group and, for each group in the number of the groups, an indication of a membership status, in the group, of the first apparatus.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: April 4, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Santosh Paul Abraham, Sameer Vermani, Maarten Menzo Wentink, Rahul Tandra, Hemanth Sampath
  • Patent number: 9608682
    Abstract: The present invention reduces the degradation in performance of one or more radio signals that are co-transmitted with a first radio signal from the same transmitting antenna in the same frequency channel and received by the same antenna due to multipath or other shared interference, where the one or more radio signals can be separated from the first radio signal. All received signals are coupled to the same adaptive array or adaptive filter to reduce multipath or other shared interference of the first radio signal, which reduces multipath and other shared interference in the other radio signals before they are separated and processed by their respective receivers, or the individual radio signals are separated before the first signal enters the adaptive array and coupled to a slave weighting network slaved to the weights of the adaptive array of the first signal to reduce interference in all the signals.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: March 28, 2017
    Inventor: Kenneth F. Rilling
  • Patent number: 9608844
    Abstract: Embodiments of systems and methods for performing channel estimation on Orthogonal frequency-division multiplexing (OFDM) signals are described. In one embodiment, a method for performing channel estimation on an OFDM signal involves performing blind channel phase estimation on an OFDM signal to obtain channel phase information and performing blind channel magnitude estimation on the OFDM signal to obtain channel magnitude information. Each of performing blind channel phase estimation on the OFDM signal and performing blind channel magnitude estimation on the OFDM signal involves detecting and suppressing a signal path of the OFDM signal. Other embodiments are also described.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: March 28, 2017
    Assignee: NXP B.V.
    Inventors: Weihua Tang, Semih Serbetli
  • Patent number: 9609675
    Abstract: Provided are a method and an apparatus for monitoring a control channel in a sub-frame including a plurality of orthogonal frequency division multiplexings (OFDMs) in a time division duplex (TDD)-based wireless communication system. A wireless device monitors a downlink control channel in at least one OFDM symbol after an OFDM symbol receives a primary synchronization signal (PSS) in the sub-frame.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: March 28, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Hak Seong Kim, Han Byul Seo
  • Patent number: 9609607
    Abstract: Disclosed is a main synchronization sequence design method for global covering multi-beam satellite LTE, comprising the follow steps: extending a standard Zadoff-Chu sequence to a generalized Zadoff-Chu sequence so as to obtain an initial candidate main synchronization sequence set of more candidate sequences; gradually narrowing down the candidate main synchronization sequence set according to a selection standard of a main synchronization sequence to obtain a final candidate main synchronization sequence set; and obtaining a main synchronization sequence set with optimal eclectic performance and complexity from the final candidate main synchronization sequence set. According to the present invention, a main synchronization sequence with optimal eclectic performance and calculation complexity can be designed for a global covering same-frequency networking multi-beam satellite LTE system.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: March 28, 2017
    Assignee: Southeast University
    Inventors: Haiming Wang, Zhuming Deng, Xiqi Gao, Xiaohu You
  • Patent number: 9602259
    Abstract: The present disclosure provides an orthogonal codes based code division multiplexing method of performing the code division multiplexing of demodulation reference signals in multiple layers of resource blocks by using orthogonal matrices, the method comprising: changing the order of chips in particular rows of a first orthogonal matrix to obtain a second orthogonal matrix with the changed order of chips; and multiplying the chips in respective rows of the second orthogonal matrix by the demodulation reference signals in corresponding layers of resource blocks correspondingly in the time direction to obtain code division multiplexing signals. The technical scheme of the present disclosure can improve the power jitter situation of downlink signals on the time, thereby the usage efficiency of the power amplifier at the base station side can be improved.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: March 21, 2017
    Assignee: Sun Patent Trust
    Inventors: Zhi Zhang, Ming Xu, Masayuki Hoshino, Seigo Nakao, Daichi Imamura
  • Patent number: 9596064
    Abstract: A method for receiving a downlink signal by user equipment in a wireless communication system that supports coordinated multiple-point transmission and reception (CoMP) according to one embodiment of the present invention includes receiving information regarding two candidate demodulation reference signal (DMRS) groups for generating a sequence of downlink demodulation reference signals; and generating a sequence of downlink demodulation reference signals using one of at least two candidate DMRS configuration parameter sets. Each of at least two candidate DMRS configuration parameter sets includes a cell identifier and a scrambling identifier. The scrambling identifier included in one of at least two candidate DMRS configuration parameter sets may be determined whether the two cell identifiers included respectively in at least two candidate DMRS configuration parameter sets are the same or not.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: March 14, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Hanjun Park, Hakseong Kim, Byounghoon Kim, Hanbyul Seo, Jonghyun Park, Kijun Kim, Suckchel Yang
  • Patent number: 9584352
    Abstract: An orthogonal frequency division multiplexing (OFDM) transmission system is provided which includes a data processing unit which generates a transmission signal using a plurality of tones including a reserved tone, a storage unit which stores Peak Reduction Kernel information according to the type of data symbol, and a compensation unit which retrieves the Peak Reduction Kernel information according to the type of data symbol from the storage unit and causes the retrieved information to be carried by the reserved tone included in the transmission signal. Therefore, a Peak-to-Average Power Ratio (PAPR) can be efficiently compensated.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: February 28, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyo-shin Choo, June-hee Lee
  • Patent number: 9584210
    Abstract: A relay communications system is described in which a base station is able to support both Frequency diversity R-PDCCH transmission and Frequency selective R-PDCCH transmission either within different cells, or within the same cell but not the same sub-frame or within the same cell and within the same sub-frame.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: February 28, 2017
    Assignee: NEC CORPORATION
    Inventors: Yassin Aden Awad, Yasushi Maruta
  • Patent number: 9577806
    Abstract: A method and apparatus for transmitting a downlink reference signal in a wireless communication system supporting multiple antennas are discussed. A method for transmitting Channel State Information-Reference Signals (CSI-RSs) for eight or less antenna ports includes selecting one of a plurality of CSI-RS Resource Element (RE) groups defined on a data region of a downlink subframe and mapping CSI-RSs for the eight or less antenna ports to the selected CSI-RS RE group, and transmitting the downlink subframe in which the CSI-RSs for the eight or less antenna ports are mapped.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: February 21, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Dae Won Lee, Hak Seong Kim, Byoung-Hoon Kim, Ki Jun Kim, Eun Sun Kim
  • Patent number: 9577792
    Abstract: A method for allocating resources in a mobile communication system is provided. The resource allocation method includes determining whether a transmission time of response information indicating presence/absence of an error in received data overlaps a transmission time of channel state information; and when the transmission times overlap each other, allocating, to the response information, a resource block for the channel state information, cyclic shift values in a frequency domain, and orthogonal sequences having orthogonality in a time domain.
    Type: Grant
    Filed: June 10, 2008
    Date of Patent: February 21, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-Bum Kim, Joon-Young Cho, Hwan-Joon Kwon
  • Patent number: 9571127
    Abstract: The present invention provides a method of transmitting broadcast signals, the method including, encoding service data, building at least one signal frame by mapping the encoded service data, modulating data in the built at least one signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, scheme and transmitting the broadcast signals having the modulated data.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: February 14, 2017
    Assignee: LG Electronics Inc.
    Inventors: Sangchul Moon, Woosuk Ko, Sungryong Hong, Jinwoo Kim, Jongwoong Shin
  • Patent number: 9571316
    Abstract: Provided herein is a method and apparatus for realizing a frequency-spatial filter with variable bandwidth, the method including generating M number of FFT channel blocks having N number of channels by performing an N point FFT (Fast Fourier Transform) processing using M number of array antenna inputs; combining some of the N number of channels of each FFT channel block according to a frequency bandwidth variable parameter value; combining some of spatial response vector channels in a combined channel of each FFT channel block according to a spatial bandwidth variable parameter value; and combining all the channels and outputting the same.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: February 14, 2017
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chung Sup Kim, Kang Hee Kim, Ki Cheol Tae, Sang Won Kim, Heung Yong Kang, Yong Seok Choi
  • Patent number: 9571313
    Abstract: Aspects of embodiments relate to an optical wavelet transform (WT) or inverse wavelet transform (IWT) medium for implementing optical multiwavelet orthogonal Frequency Division Multiplexing (OFDM) or optical demultiplexing. In embodiments, the optical WT/IWT medium comprises a plurality of N waveguides for receiving in parallel a corresponding number of N modulated optical input signals ?1,MOD to ?N,MOD. Each waveguide comprises at least two optical resonators configured such to realize a wavelet filterbank so that the modulated optical signals ?1,MOD to ?n,MOD undergo WT/IWT in a manner such to obtain optical wavelet transformed signals that can be orthogonally frequency division multiplexed or demultiplexed.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: February 14, 2017
    Assignee: Mer-Cello Wireless Solutions Ltd.
    Inventors: Yossef Ben-Ezra, Yaniv Ben Haim
  • Patent number: 9572068
    Abstract: This disclosure describes systems, methods, and computer-readable media related to employing rate adaptation in full-duplex communication. A first computing device may establish with a second computing device a full-duplex communication channel having a forward data transmission direction and a reverse data transmission direction. The first computing device may transmit to the second computing device a first data portion in the forward data transmission direction of the full-duplex communication channel at a default data transmission rate. The first computing device may receive a second data portion in the reverse direction of the full-duplex communication channel containing a forward channel quality information (CQI) associated with the forward data transmission direction. The first computing device may transmit a third data portion at a first data transmission rate, wherein the first data transmission rate is based at least in part on the forward CQI contained in the second data portion.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: February 14, 2017
    Assignee: INTEL CORPORATION
    Inventors: Ehsan Aryafar, Yang-Seok Choi, Minyoung Park, Shilpa Talwar
  • Patent number: 9565567
    Abstract: In one aspect the embodiments of the invention provide a method that includes transmitting a first frame comprising a first type of message from a first node for reception by a second node. The first node is associated with a first wireless communication system and the second node is associated with a second wireless communication system. The first type of message includes a first information element for identifying the second node and a second information element for specifying that the first frame is transmitted to initiate a request for simultaneous transmission by the first node and by the second node. The first frame is also received by a third node that is part of the first wireless communication system. The method further includes receiving from the third node a second frame that includes a second type of message.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: February 7, 2017
    Assignee: Nokia Technologies Oy
    Inventors: Fabiano de Sousa Chaves, Sayantan Choudhury, Fuad Mousse Abinader, Jr., Andre Mendes Cavalcante, Erika Portela Lopes de Almeida, Esa Tuomaala, Klaus F. Doppler, Mika Kasslin
  • Patent number: 9564926
    Abstract: Multiple data permutation operations in respective different dimensions are used to provide an overall effective data permutation using smaller blocks of data in each permutation than would be used in directly implementing the overall permutation in a single permutation operation. Data that has been permuted in one permutation operation is block interleaved, and the interleaved data is then permuted in a subsequent permutation operation. A matrix transpose is one example of block interleaving that could be applied between permutation operations.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: February 7, 2017
    Assignee: CORTINA SYSTEMS, INC.
    Inventors: Arash Farhoodfar, Frank R. Kschischang, Benjamin P. Smith, Andrew Hunt
  • Patent number: 9565001
    Abstract: Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with a base station in a cellular communication system and includes a partitioning unit configured to provide first and second groups of guard subcarriers that partition a synchronization portion from data portions in a downlink synchronization signal. The transmitter also includes a transmit unit configured to transmit the downlink synchronization signal. Additionally, the receiver is for use with user equipment in a cellular communication system and includes a receive unit configured to receive a downlink synchronization signal. The receiver also includes a processing unit configured to provide a synchronization portion based on employing first and second groups of guard subcarriers that partition the synchronization portion from data portions of the downlink synchronization signal.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: February 7, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Tarkesh Pande, Eko N. Onggosanusi, Anand G. Dabak
  • Patent number: 9553660
    Abstract: Provided are a receiver, a transmitter and a radio communication method capable of using non-orthogonal multiple access while suppressing cost increase and processing delay. A mobile station 200A receives non-orthogonal signals, also receives a reference signal to be used for interference cancellation, and extracts the non-orthogonal signal addressed to the mobile station 200A from the received non-orthogonal signals by demodulating and cancelling the radio signal addressed to another mobile station. In addition, the mobile station 200A demodulates the extracted non-orthogonal signal addressed to the mobile station 200A on the basis of the reference signal. The reference signal is multiplexed in the same radio resource block as a resource block allocated to the non-orthogonal signals, and is multiplexed in the radio resource block only when at least one signal is scheduled in the radio resource block.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: January 24, 2017
    Assignee: NTT DOCOMO, INC.
    Inventor: Yoshihisa Kishiyama
  • Patent number: 9553749
    Abstract: Provided is a radio communication base station device which can suppress a use amount of an SRS communication resource. In this device, a correlation rule setting unit (102) sets a rule for correlating a preamble with an SRS transmission time interval so that the preamble transmission time band and the SRS transmission time band are in the same transmission time band. An SRS transmission band decision unit (103) decides a time interval of a transmission time band which can transmit the SRS according to the preamble transmission time interval inputted from a preamble transmission band decision unit (101) and the correlation rule setting unit (102).
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: January 24, 2017
    Assignee: Godo Kaisha IP Bridge 1
    Inventors: Takashi Iwai, Daichi Imamura, Tomofumi Takata, Atsushi Matsumoto, Yoshihiko Ogawa, Sadaki Futagi
  • Patent number: 9549328
    Abstract: A method to optimize the communication on a channel between an access point and at least one client device, said channel being characterized by a center frequency and a bandwidth, comprises: establishing a connection on a first channel according to a first center frequency and a first bandwidth; exchanging data through this first channel between the access point and the client device; monitoring a first interference level on the first channel; the access point, while the data are exchanged, executes: informing the client device to switch to a second channel having a different center frequency and/or a different bandwidth; determining a second interference level on the second channel; comparing the first interference level with the second interference level; deciding to switch back or keep the second channel based on the comparison.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: January 17, 2017
    Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
    Inventors: Julien Herzen, Ruben Merz, Patrick Thiran
  • Patent number: 9544899
    Abstract: In a wireless communication base station device, a modulation unit carries out modulation processing for Dch data after coding to generate a Dch data symbol. A modulation unit carries out modulation processing for Lch data after coding to generate an Lch data symbol. An allocation unit allocates the Dch data symbol and Lch data symbol to each sub-carrier composing an OFDM symbol and outputs the allocated sub-carrier to a multiplex unit. In this case, the allocation unit allocates the Dch data symbol to a plurality of resource blocks where one Dch is arranged at an interval equal to integral multiples of the number of resource blocks composing a resource block group.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: January 10, 2017
    Assignee: Panasonic Corporation
    Inventors: Akihiko Nishio, Christian Wengerter, Hidetoshi Suzuki, Katsuhiko Hiramatsu
  • Patent number: 9544860
    Abstract: Pilot signal transmission sequences and methods for use in a multi-sector cell. Pilots in different sectors are transmitted at different known power levels. In adjacent sectors a pilot is transmitted while no pilot is transmitted in the adjoining sector. This represents transmission of a NULL pilot signal. A cell NULL is also supported in which NULL pilots are transmitted in each sector of a cell at the same time. Multiple pilot signal measurements are made. At least two channel quality indicator values are generated from measurements corresponding to at least two pilot signals of different power levels. The two values are transmitted back to the base station which uses both values to determine the transmit power requited to achieve a desired SNR at the wireless terminal. The wireless terminal also reports information indicating its location to a sector boundary.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: January 10, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Rajiv Laroia, John L. Fan, Junyi Li
  • Patent number: 9537641
    Abstract: A first powerline communication device, associated with a first powerline communication network, determines a plurality of time intervals in a beacon period of the first powerline communication network based, at least in part, on variations in levels of interference from a second powerline communication network which shares a powerline communication medium with the first powerline communication network. The first powerline communication device determines at least one channel adaptation parameter for each of the plurality of time intervals in the beacon period to compensate for effects of the variations in the levels of interference from the second powerline communication network. The first powerline communication device applies the at least one channel adaptation parameter corresponding to one or more of the plurality of time intervals in the beacon period when transmitting data via the powerline communication medium.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: January 3, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Hassan Kaywan Afkhami, Hao Zhu, Lawrence Winston Yonge, III
  • Patent number: 9537620
    Abstract: The disclosure provides a method and device for allocating a resource location with a frequency hopping function. The method includes: an uplink bandwidth of a Long Term Evolution (LTE) communication system is acquired; it is determined whether frequency hopping information needs to be allocated to uplink continuous frequency-domain resource location information in a multi-antenna port transmission mode, and when the frequency hopping information needs to be allocated, a length of a resource location and frequency hopping bit indicator and a length of frequency-domain resource location information are obtained according to the uplink bandwidth; a difference Value_D between the length of the resource location and frequency hopping bit indicator and the length of the frequency-domain resource location information is calculated; and frequency hopping information is allocated to the frequency-domain resource location information according to the difference Value_D.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: January 3, 2017
    Assignee: ZTE Corporation
    Inventor: Peiyan Fei
  • Patent number: 9531453
    Abstract: A communication control method is applied to a mobile communication system including a base station that transmits a downlink signal through a plurality of antenna ports, and a user terminal that feeds back precoder matrix information to the base station, the downlink signal being precoded by using a precoder matrix, the precoder matrix information being indicating a precoder matrix preferably used in a downlink. The communication control method comprises: a step of feeding back, by the user terminal, correction value information for correcting the precoder matrix information to the base station when the precoder matrix information is fed back or after the precoder matrix information is fed back.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: December 27, 2016
    Assignee: KYOCERA Corporation
    Inventor: Chiharu Yamazaki
  • Patent number: 9531460
    Abstract: The present invention discloses a method for transmitting a 4-antenna precoding matrix, a user equipment, and a base station. The method includes determining a rank used for indicating the number of transmission layers, determining a first precoding matrix in a codebook set corresponding to the rank, determining a first PMI and a second PMI used for indicating the first precoding matrix, and sending the first PMI and the second PMI used for indicating the first precoding matrix to a base station.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: December 27, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Qiang Wu, Leiming Zhang, Jianghua Liu
  • Patent number: 9525442
    Abstract: An OFDM encoding apparatus for encoding OFDM symbols into an OFDM signal includes: a pre-distortion unit that pre-distorts OFDM symbols into pre-distorted OFDM symbols, the OFDM symbols including payload data and each being carried on multiple OFDM subcarriers; an OFDM generator that generates an OFDM signal from the pre-distorted OFDM symbols by OFDM modulating the pre-distorted OFDM symbols; and a filter that filters the OFDM signal to obtain a filtered OFDM signal, the filter being configured to attenuate the spectrum of the OFDM signal in frequency bands outside the signal bandwidth of the OFDM signal by applying a filter transfer function to the OFDM signal. The pre-distortion unit is configured to apply a pre-distortion transfer function equal to the inverse of the filter transfer function to the OFDM symbols.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: December 20, 2016
    Assignee: SONY CORPORATION
    Inventors: Lothar Stadelmeier, Jan Zoellner, Joerg Robert, Philipp Hasse
  • Patent number: 9520925
    Abstract: A method and apparatus for transmitting a signal in a wireless communication system are provided. The method includes: generating R spatial stream each of which is generated on the basis of an information stream and reference signal; generating N transmit streams on the basis of the R spatial streams and a precoding matrix (where R<N); mapping the N transmit streams to at least one resource block; and generating N signals from the N transmit streams mapped to the at least one resource block, and the transmitting the N signals to a user equipment through respective antennas.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: December 13, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Moon Il Lee, Wook Bong Lee, Ja Ho Koo, Hyun Soo Ko, Jae Hoon Chung, Bin Chul Ihm
  • Patent number: 9515760
    Abstract: A method establishing a quality indicator of a radio transmission channel in a first cell of a cellular network using a plurality of orthogonal frequency-division multiplexed subcarriers for transmitting data. A first transmitter located in the first cell transmits a reference control signal including a total-load control signal modulating one or more of the orthogonal subcarriers, during one or more first symbol times dedicated to transmission of symbols other than data symbols, and a useful-load control signal modulating one or more orthogonal subcarriers during at least one second symbol time dedicated to transmission of data symbols. A transmitter located in an adjacent cell transmits an interfering control signal modulating, during the first symbol time(s). The quality indicator is determined according to a measured quality indicator of the channel under the useful load and a measured quality indicator of the channel under the total load.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: December 6, 2016
    Assignee: ORANGE
    Inventors: Dinh Thuy Phan Huy, Vincent Diascorn
  • Patent number: 9510325
    Abstract: The present invention provides a channel selection method and an apparatus, relates to the field of communications, can improve channel scan and detection efficiency. The method includes: randomly selecting m channels from a preset channel page; determining, from the m channels, a working channel and a spare channel that meet a preset condition; scanning, the working channel of the first superframes and the spare channel of the first superframes in an inactive period of each of the n first superframes according to preset first scan duration, to acquire n energy levels of the working channel and n energy levels of the spare channel; and determining, in an inactive period of the nth first superframe, a working channel for sending a second superframe and a spare channel of the second superframe according to the n energy levels of the working channel and the n energy levels of the spare channel.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: November 29, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Pei Liu, Jin Shuai, Weixia Zou
  • Patent number: 9510336
    Abstract: A wireless communication system includes an upper transmission station and a lower transmission station, each serving as a transmission station, a terminal serving as a reception station. The upper transmission station allocates a downlink control channel for each terminal to part of a predetermined data-channel region ascribed to the lower transmission station based on a demodulation reference signal for each transmission station. Based on the allocation result, the lower transmission station allocates the downlink control channel for each terminal, which is disposed at art of the data-channel region thereof. The terminal decodes the downlink control channel based on the demodulation reference signal.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: November 29, 2016
    Assignee: KDDI CORPORATION
    Inventors: Xiaoqiu Wang, Yuji Ikeda, Satoshi Konishi
  • Patent number: 9509464
    Abstract: A flexible OFDM/OFDMA frame structure technology for communication systems is disclosed. The OFDM frame structure technology comprises a configurable-length frame which contains a variable length subframe structure to effectively utilize OFDM bandwidth. Furthermore, the frame structure facilitates spectrum sharing between multiple communication systems.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: November 29, 2016
    Assignee: ZTE (USA) Inc.
    Inventors: Sean Cai, Jerry Chow, Hongyun Qu, Huiying Fang
  • Patent number: 9507500
    Abstract: A system for processing user input includes an input device, an input processing unit, a high-latency subsystem, a low-latency subsystem, input processing unit software for generating signals in response to user inputs, and an output device. The low-latency subsystem receives the signals and generates low-latency output and the high-latency subsystem processes the signals and generates high-latency output.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: November 29, 2016
    Assignee: Tactual Labs Co.
    Inventors: Daniel Wigdor, Steven Leonard Sanders, Ricardo Jorge Jota Costa, Clifton Forlines
  • Patent number: 9503161
    Abstract: A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: November 22, 2016
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Peiying Zhu, Wen Tong
  • Patent number: 9496977
    Abstract: The present disclosure discloses a method and an apparatus for resource mapping and code division multiplexing. In the present disclosure, each cell selects a mapping scheme among at least two mapping schemes to implement resource mapping, which effectively reduces interference imposed on reference signal symbols of users at the edge of a cell; vector switching is performed for an orthogonal matrix to obtain multiple different codeword sequences and implement codeword design, so that a problem that the output power of reference signal symbols is unbalanced can be effectively alleviated.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: November 15, 2016
    Assignee: HUAWEI TECHNOLOGIES CO., LTD
    Inventors: Weijun Sun, Yongxing Zhou
  • Patent number: 9497757
    Abstract: A method and apparatus of transmitting control information for reduction of inter-cell interference (ICI) in a wireless communication system is provided. The base station transmits one of precoding information and antenna information for every time frequency resource to a second base station based on a ICI reduction method determined by the base station.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: November 15, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Ki Tae Kim, Jin Young Chun, Su Nam Kim, Ji Won Kang, Bin Chul Ihm, Sung Ho Park
  • Patent number: 9497000
    Abstract: The present invention relates to a method for transmitting data units in wireless LAN systems. The method includes the steps of generating a short training field (STF) for a first channel, generating a long training field (LTF) for the first channel, duplicating the STF on at least one second channel, duplicating the LTF on at least one second channel, transmitting the STF and the one or more duplicated STFs through a transmission channel, transmitting the LTF and the one or more duplicated LTFs through the transmission channel, and transmitting a data field through the transmission channel.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: November 15, 2016
    Assignee: LG Electronics Inc.
    Inventors: Jinsoo Choi, Seunghee Han, Jinsam Kwak, Yongho Seok, Jeongki Kim
  • Patent number: 9496903
    Abstract: A method for reducing the crest factor of a wideband signal including N narrowband signals, N being a natural integer greater than or equal to two, the method, implemented by an emitting equipment, including phase shifting the narrowband signals between them in such a way as to reduce the crest factor.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: November 15, 2016
    Assignee: AIRBUS DS SAS
    Inventors: Philippe Mege, Christophe Molko
  • Patent number: 9491761
    Abstract: The invention involves utilizing pieces of disjoint spectral blocks. In one embodiment, a frequency division duplex approach is used, where each spectral block is utilized solely for either uplink or downlink communications. In another embodiment, a time division duplex approach is used, where each spectral block is time divided and uplink and downlink communications are assigned to different time slots within the same spectral blocks. In another embodiment, a code division duplex approach is utilized, where uplink and downlink communications are assigned different codes/hopping patterns within a same spectral block.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: November 8, 2016
    Assignee: InterDigital Technology Corporation
    Inventor: Prabhakar R. Chitrapu
  • Patent number: 9491711
    Abstract: The present invention relates to a method in a first User Equipment (UE) served by a radio base station (RBS) of a wireless network, for uplink power control at Multiple User Multiple-Input-Multiple-Output (MU-MIMO) scheduling. The method comprises obtaining a power adaptation parameter for use in uplink transmission power control when the first UE is scheduled to be in pair with a second UE, or is scheduled to be de-paired from the second UE. The method also comprises receiving an indication from the radio base station to use the obtained power adaptation parameter in uplink transmission power control, and adapting an uplink transmission power based on the obtained power adaptation parameter and the received indication. The present invention also relates to the corresponding method in the RBS, and to the UE and the RBS.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: November 8, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON
    Inventors: Rui Fan, Jinhua Liu, Chan Li
  • Patent number: 9491630
    Abstract: A mobile communication method is applied to a mobile communication system comprising a general base station that manages a general cell and a specific base station that manages a specific cell having a coverage area smaller than a coverage area of the general cell. The mobile communication method comprises: a step A of notifying, by the general base station, the specific base station of scheduling information indicating an uplink radio resource to be assigned to general mobile terminals that are mobile terminals in a connected state in the general cell, at a time interval of a predetermined time; and a step B of notifying, by the specific base station, the general base station of general mobile terminal interference information indicating interference that the specific cell receives according to the uplink signals transmitted from the general mobile terminals at the time interval of the determined time.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: November 8, 2016
    Assignee: KYOCERA Corporation
    Inventors: Kugo Morita, Chiharu Yamazaki
  • Patent number: 9473179
    Abstract: Methods, apparatuses, and computer program products for signal detection and classification are provided. One method includes detecting, by a station, a presence of a signal and classifying the signal according to type. There may be at least three possibilities for the type of signal. The classifying may include performing a composite hypothesis test, such as a generalized likelihood ratio test (GLRT) for the at least three possibilities.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: October 18, 2016
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Amitav Mukherjee, Sayantan Choudhury
  • Patent number: 9468004
    Abstract: The present invention relates to methods and apparatus in a RBS and a UE for reference signal (RS) measurements in an OFDM system, that enable having a configurable RS transmission bandwidth which is smaller than the system bandwidth. This allows for better interference coordination of RS, which in turn improves the UE RS measurements used for different services such as positioning. The RBS retrieves the RS transmission bandwidth, determines a RS measurement bandwidth based on this RS transmission bandwidth, and transmits the determined bandwidth to the UE. The UE receives the RS measurement bandwidth and measures the RS in a bandwidth determined based on the received measurement bandwidth and the UE capability.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: October 11, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Iana Siomina, Dirk Gerstenberger, Daniel Larsson
  • Patent number: 9467995
    Abstract: The set of resource aggregation levels available for forming an enhanced control channel message may vary from one subframe to another, based on the level of puncturing in the transmitted subframes. An example method begins with determining members of a set of aggregation levels usable to aggregate the non-overlapping subsets of resource elements for transmitting downlink control information. This determining is based on a puncturing level to be used for the transmission of the downlink control information. Downlink control information for the given subframe is mapped to one or more non-overlapping subsets of resource elements in the at least one block of time-frequency resources, according to an aggregation level selected from the determined set, and then transmitted, in the one or more non-overlapping subsets. This method may be repeated for each of several subframes, where the puncturing may differ from one subframe to another.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: October 11, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mattias Frenne, Jung-Fu Cheng, Johan Furuskog, Havish Koorapaty, Daniel Larsson
  • Patent number: 9467270
    Abstract: Methods, an apparatus, and a network manager for cooperative communication are provided. A method of communication by a serving base station performing a cooperative communication with a plurality of base stations includes selecting serving channel code information based on Channel Status Information (CSI) of the serving base station, receiving cooperating channel code information based on CSI of a cooperating base station from the cooperating base station performing the cooperative communication with the serving base station, determining a compensation parameter based on the serving channel code information and the cooperating channel code information, and determining a beamforming vector of the serving base station based on the compensation parameter.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: October 11, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun Seok Ko, Eun Yong Kim