Quadrature Carriers Patents (Class 370/206)
  • Patent number: 10389390
    Abstract: A transmitter is provided. The transmitter includes: a low density parity check (LDPC) encoder configured to encode input bits to generate an LDPC codeword including the input bits and parity bits; a repeater configured to select at least a part of bits constituting the LDPC codeword and add the selected bits after the input bits; and a puncturer configured to puncture at least a part of the parity bits.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: August 20, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Se-ho Myung, Kyung-joong Kim, Hong-sil Jeong
  • Patent number: 10374858
    Abstract: A transceiving system using a joined modulation alphabet A having a size M the symbols of which are distributed on a plurality N of orthogonal dimensions, the symbols carried by a dimension belonging to a linear sub-alphabet An having a size P, with M=NP. The transmitter performs a turbocoding of a block of information bits, the code words provided by the turbocoder being mapped to symbols of the joined modulation alphabet before modulating the signal to be transmitted. The receiver performs turbodecoding from the projection of the symbols received on the orthogonal dimensions of the alphabet.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: August 6, 2019
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Yoann Roth, Vincent Berg, Jean-Baptiste Dore, Laurent Ros
  • Patent number: 10374854
    Abstract: An apparatus for receiving signals includes a receiver for receiving a time domain signal from a transmitter, wherein at least one first information bit is mapped, resulting in at least one first mapped symbol; at least one second information bit is mapped, resulting in at least one second mapped symbol; the at least one second mapped symbol is multiplied by at least one third information bit; and the time domain signal is generated from the at least one first mapped symbol and the at least one second mapped symbol.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: August 6, 2019
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Yeong Hyeon Kwon, Seung Hee Han, Min Seok Noh, Young Woo Yun
  • Patent number: 10374635
    Abstract: An interleaving and mapping method and a deinterleaving and demapping method for an LDPC codeword are provided. The interleaving and mapping method comprises: performing first bit interleaving on a parity bits part of the LDPC codeword to obtain interleaved parity bits; splicing an information bit part of the codeword and the interleaved parity bits into a codeword after the first bit interleaving; dividing the codeword after the first bit interleaving into multiple consecutive bit subblocks in a predetermined length, and changing the order of the bit subblocks according to a corresponding permutation order (bit-swapping pattern) to form a codeword after second bit interleaving; dividing the codeword after the second bit interleaving into two parts, and writing the two parts into storage space in a column order respectively and reading the two parts from the storage space in a row order respectively to obtain a codeword after third bit interleaving.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: August 6, 2019
    Assignee: Shanghai National Engineering Research Center of Digital Television Co., Ltd.
    Inventors: Wenjun Zhang, Yijun Shi, Dazhi He, Yunfeng Guan, Yin Xu, Xufeng Guo
  • Patent number: 10349400
    Abstract: This invention relates to the field of communication technology, and particularly to a communication exchange mechanism design based on frequency hopping, which is applicable to cognitive radio networks. A method for generating hopping frequency sequences for multi-transceiver cognitive radio networks is provided, so as to realize the optimization and tradeoff of the five performance parameters, i.e. DoR, MTTR, ATTR, CL, and NSS. That, is, for a given DoR, the frequency-hopping system should minimize the NSS of the clock synchronous and asynchronous frequency-hopping systems under the condition of MTTR=ATTR=1 and CL<1. The frequency-hopping system of the present invention can use a minimal number of transceivers at each cognitive node to ensure that any two cognitive nodes always achieve frequency hopping rendezvous in each timeslot under the limiting conditions of a certain anti-jamming ability against the primary users and a certain degree of the most serious collisions of control information exchange.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: July 9, 2019
    Assignee: University of Electronic Science and Technology of China
    Inventors: Xuesong Tan, Jieran Wang, Yifan Wang
  • Patent number: 10341030
    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: September 25, 2017
    Date of Patent: July 2, 2019
    Assignee: INPHI CORPORATION
    Inventors: Mario Alejandro Castrillon, Damian Alfonso Morero, Mario Rafael Hueda
  • Patent number: 10320419
    Abstract: An encoding method, decoding method, encoding device and decoding device for structured LDPC codes. The method includes: determining a basic matrix used for encoding, which includes K0 up-and-down adjacent pairs; and according to the basic matrix and an expansion factor corresponding to the basic matrix, performing an LDPC encoding operation of obtaining a codeword of Nb×z bits according to source data of (Nb?Mb)×z bits, herein z is the expansion factor, and z is a positive integer which is greater than or equal to 1. The provided technical solution is applicable to the encoding and decoding of the structured LDPC, thereby realizing the encoding and decoding of LDPC at the high pipeline speed.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: June 11, 2019
    Assignee: ZTE Corporation
    Inventors: Jun Xu, Liguang Li, Zhifeng Yuan, Jin Xu, Kaibo Tian
  • Patent number: 10305535
    Abstract: A radio receiver for processing digital chirp spread-spectrum modulated signals that comprise a plurality of frequency chirps that are cyclically time-shifted replicas of a base chirp profile, said time-shifts being an encoded representation of a transmitted message. Includes a soft demapping unit that is adapted for working on fully populated as well as on partial modulation sets, and implements a timing error correction loop that acts back both in the time domain and in the frequency domain.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: May 28, 2019
    Assignee: Semtech Corporation
    Inventors: Olivier Bernard André Seller, Nicolas Sornin
  • Patent number: 10237753
    Abstract: Disclosed are a frame transmission method using a selective beamforming and a communication apparatus to perform the frame transmission method. The communication apparatus may determine a beamforming matrix based on classification information in which a plurality of subcarriers used for communication is classified into a plurality of frequency units, may map a long training field (LTF) sequence to the beamforming matrix, and transmit a beamforming training (BF-T) frame including the mapped LTF sequence to a plurality of stations, may receive, from the plurality of stations having receiving the BF-T frame, feedback information generated based on a reception strength of the BF-T frame, and may allocate frequency units to data frames to be transmitted to the plurality of stations based on the feedback information, and transmit the data frames using the allocated frequency units. The reception strength of the BF-T frame may be determined at each station for each frequency unit.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: March 19, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yu Ro Lee, Jae Woo Park, Jae Seung Lee, Jee Yon Choi, Il Gyu Kim, Seung Chan Bang
  • Patent number: 10230509
    Abstract: A first radio signal is received that was transmitted from a first antenna at a transmitter and a second radio signal transmitted from a second antenna at the transmitter different from the first antenna. The first radio signal is converted to a first orthogonal frequency division multiplexing (OFDM) frame signal, and the second radio signal is converted to a second OFDM frame signal. The first OFDM frame signal includes a grid of multiple frequency subcarriers and time periods, each time period with the frequency carriers corresponding to a first OFDM symbol such that the first OFDM frame includes first OFDM symbols. A first OFDM symbol is carried on frequency subcarriers during a time period, and the first OFDM frame includes first reference OFDM symbols located at corresponding time-frequency resource elements in the grid. Each resource element is defined by a one of the frequency subcarriers and one of the time periods.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: March 12, 2019
    Assignee: Optis Wireless Technology, LLC
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka, Yoichi Nakagawa
  • Patent number: 10225838
    Abstract: Some demonstrative embodiments include devices, systems and/or methods of wireless communication over non-contiguous channels. For example, a device may include a wireless communication unit capable of transmitting symbols of a wireless communication packet to a wireless communication device over a plurality of non-contiguous wireless communication channels.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: March 5, 2019
    Assignee: INTEL CORPORATION
    Inventors: Solomon Trainin, Assaf Kasher
  • Patent number: 10211954
    Abstract: An orthogonal frequency division multiple access (OFDMA) frame tone allocation includes a 256 tone payload consisting of 228 data and pilot tones and 28 null tones. The 28 null tones consist of guard tones and at least one direct current (DC) tone. In one example, the 256 tone payload consists of 224 data tones, 4 common pilot tones, and 28 null tones. In another example, the 256 tone payload consists of 222 data tones, 6 common pilot tones, and 28 null tones. In yet another example, the 256 tone payload may consist of 220 data tones, 8 common pilot tones, and 28 null tones. The OFDMA frame may be a downlink OFDMA frame or an uplink OFDMA frame.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: February 19, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jung Hoon Suh, Osama Aboul-Magd
  • Patent number: 10203218
    Abstract: A method according to the present invention includes predicting a vehicular route. GPS data of a vehicle's position on a road network is received. A digital map representing the road network is received. The digital map includes a plurality of partitioned regions. Each of the partitioned regions includes a plurality of geographic nodes. A starting node is selected. At least one partitioned region is selected based on a predetermined travel-time horizon of the vehicle from the starting node. Route simulation is performed between the plurality of geographic nodes of the selected at least one partitioned region and a plurality of potential future routes is generated. An actual route of the vehicle is detected. The actual route of the vehicle is compared with the plurality of potential future routes. A probability of the vehicle traveling along each potential future route is determined. A future route of the vehicle is predicted.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 12, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wei Shan Dong, Ning Duan, Guo Qiang Hu, Ting Yuan, Jun Zhu
  • Patent number: 10194463
    Abstract: An apparatus and method for transmitting an indicator of channel quality while minimizing the use of a broadcast channel is described. A metric of forward link geometry of observed transmission signals is determined. An indicator of channel quality value is determined as a function of the observed transmission signals. An access sequence is selected, randomly, from one group of a plurality of groups of access sequences, wherein each of the plurality of groups of access sequences correspond to different ranges of channel quality values.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: January 29, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Arak Sutivong, Edward Harrison Teague, Alexei Gorokhov
  • Patent number: 10187240
    Abstract: A system and method that scrambles the phase characteristic of a carrier signal are described. The scrambling of the phase characteristic of each carrier signal includes associating a value with each carrier signal and computing a phase shift for each carrier signal based on the value associated with that carrier signal. The value is determined independently of any input bit value carried by that carrier signal. The phase shift computed for each carrier signal is combined with the phase characteristic of that carrier signal so as to substantially scramble the phase characteristic of the carrier signals. Bits of an input signal are modulated onto the carrier signals having the substantially scrambled phase characteristic to produce a transmission signal with a reduced PAR.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: January 22, 2019
    Assignee: TQ DELTA, LLC
    Inventor: Marcos C. Tzannes
  • Patent number: 10187239
    Abstract: It is possible to reduce the PAPR of an amplified signal communicated over bonded channels by applying different phase shifts to control fields communicated over the bonded channels. The phase shifts reduce the amount of constructive interaction between the control fields by shifting the peaks of the respective signals in the time domain. The control fields may include short training fields (STFs), channel estimation (CE) fields, or header fields communicated over bonded channels.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: January 22, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Tao Wu, Yan Xin, Min Yan, Sheng Sun
  • Patent number: 10172163
    Abstract: An example method in a user equipment comprises generating a random access preamble signal and transmitting the random access preamble signal. This generating of the random access preamble signal comprises generating a Single-Carrier Frequency-Division Multiple Access (SC-FDMA) random access preamble signal comprising two or more consecutive preamble symbol groups, each preamble symbol group comprising a cyclic prefix portion and a plurality of identical symbols occupying a single subcarrier of the SC-FDMA random access preamble signal. The single subcarrier for at least one of the preamble symbol groups corresponds to a first subcarrier frequency and the single subcarrier for an immediately subsequent one of the preamble symbol groups corresponds to a second subcarrier frequency.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: January 1, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xingqin Lin, Ansuman Adhikary, Asbjörn Grövlen, Dennis Hui, Niklas Johansson, Yutao Sui, Mårten Sundberg, Yi-Pin Eric Wang
  • Patent number: 10164813
    Abstract: A transmission apparatus includes a data-block generating unit that generates and outputs a data block including fixed sequence symbols whose signal values are formed of a fixed sequence and data symbols, a pilot-block generating unit that generates and outputs a pilot block including the fixed sequence symbols and pilot symbols that are fixed symbols known on a reception side, and an output control unit to which the data block and the pilot block are inputted, which controls whether the data block or the pilot block is outputted.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: December 25, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Fumihiro Hasegawa
  • Patent number: 10158460
    Abstract: An orthogonal frequency division multiple access (OFDMA) frame tone allocation includes a 256 tone payload consisting of 228 data and pilot tones and 28 null tones. The 28 null tones consist of guard tones and at least one direct current (DC) tone. In one example, the 256 tone payload consists of 224 data tones, 4 common pilot tones, and 28 null tones. In another example, the 256 tone payload consists of 222 data tones, 6 common pilot tones, and 28 null tones. In yet another example, the 256 tone payload may consist of 220 data tones, 8 common pilot tones, and 28 null tones. The OFDMA frame may be a downlink OFDMA frame or an uplink OFDMA frame.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: December 18, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jung Hoon Suh, Osama Aboul-Magd
  • Patent number: 10149240
    Abstract: The present disclosure pertains to communication systems and methods for achieving low peak to average power ratio (PAPR) for transmitted symbols of wireless devices. In an aspect, the present disclosure relates to a transmitter of a communication system, wherein the transmitter includes a circular convolution module that is configured to circularly convolve a preset number of values with a group of M symbols from a total number of symbols, an M-point DFT module that is configured to process output of the circular convolution to generate a first set of discrete Fourier transform (DFT) samples, and an N-point IDFT module that is configured to process the first set of DFT samples to obtain a first set of inverse discrete Fourier transform (IDFT) samples for onward transmission to a receiver.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: December 4, 2018
    Assignee: Tejas Networks Ltd.
    Inventors: Vinod Kumar Madaiah, Rohith C. Aralikatti
  • Patent number: 10149201
    Abstract: The disclosure provides a method (400) for transmission coordination on a wireless backhaul path. The wireless backhaul path comprises at least a network node and its upstream node and downstream node. The method comprises, at the network node: determining (S410) a subframe allocation for transmissions to and from the network node; and transmitting (S420) to the downstream node an instruction to insert a Guard Period (GP) into a first subframe from the downstream node to the network node based on the determined subframe allocation, so as to avoid interference on the first subframe from a subframe immediately following the first subframe.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: December 4, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Rui Fan, Zhiheng Guo, Jinhua Liu, Qianxi Lu
  • Patent number: 10142149
    Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: November 27, 2018
    Assignee: WI-FI ONE, LLC
    Inventors: Dae Won Lee, Dong Wok Roh, Byeong Woo Kang, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim
  • Patent number: 10139473
    Abstract: A radar apparatus includes: a transmitting antenna; a receiving antenna; transmitting circuitry; receiving circuitry; a storage; and control circuitry which selects one of a plurality of spread codes. A radar signal includes a plurality of periodic frames. Each of the frames includes first and second segments. The first segment includes a first spread signal which is obtained by multiplication of a predetermined reference signal by at least a part of the selected spread code. The second segment includes a second spread signal which is obtained by multiplication of the identification code by at least the part of the selected spread code.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: November 27, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Shigeru Soga
  • Patent number: 10123336
    Abstract: A resource allocation optimization method is provided for a Simultaneous Information and Energy Transfer (SIET) system. A baseband signal transmitted by a transmitting terminal of the system contain an information signal and an energy signals. The optimization method comprises a step P1 of determining a system pre-allocated parameter set, and solving steps for the step P1. The multicarrier broadband SIET optimization method disclosed is automatically configurable and feasible, giving consideration to both wireless energy supply and information transmission. The energy signal and the information signal are simultaneously and independently transmitted to the receiving terminal, therefore providing the energy required by the receiving terminal operating in a working mode. The method described can be widely applied into a variety of information and energy simultaneous transformation systems.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: November 6, 2018
    Assignee: S. University of Science and Technology of China
    Inventors: Yi Gong, Zidong Han
  • Patent number: 10117234
    Abstract: A system and method for mapping a combined frequency division duplexing (FDD) Time Division Multiplexing (TDM)/Time Division Multiple Access (TDMA) downlink subframe for use with half-duplex and full-duplex terminals in a communication system. Embodiments of the downlink subframe vary Forward Error Correction (FEC) types for a given modulation scheme as well as support the implementation of a smart antenna at a base station in the communication system. Embodiments of the system are also used in a TDD communication system to support the implementation of smart antennae. A scheduling algorithm allows TDM and TDMA portions of a downlink to efficiently co-exist in the same downlink subframe and simultaneously support full and half-duplex terminals.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: October 30, 2018
    Assignee: Wi-LAN, Inc.
    Inventors: Kenneth L. Stanwood, Israel Jay Klein, George Lin, An Chen
  • Patent number: 10091337
    Abstract: Techniques for header encoding include encoding a plurality of bits using a forward error correction code, generating an FEC codeword comprising a plurality of encoded bits, and concatenating a first copy of the FEC codeword with a second copy of the FEC codeword, wherein the concatenating comprises cyclically shifting by two bits the second concatenated copy of the FEC codeword relative to the first concatenated copy of the FEC codeword, wherein the encoded bits of the first and second copies of the FEC codewords are modulated on at least one OFDM symbol. techniques for header decoding include receiving a plurality of encoded bits comprising at least two concatenated copies of an FEC codeword, decoding a first copy of the FEC codeword to generate a first plurality of decoded bits, and decoding a second copy of the FEC codeword to generate a second plurality of decoded bits.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 2, 2018
    Assignee: APPLIED TRANSFORM, LLC
    Inventor: Joon Bae Kim
  • Patent number: 10078612
    Abstract: An apparatus is described herein. The apparatus includes a plurality of conductors, wherein at least one conductor is a common-mode conductor. The apparatus also includes an encoder to encode data to be transmitted on the plurality of conductors, wherein a data speed of the common-mode conductor is limited and a data speed of other conductors is maximized according to an encoding matrix.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: September 18, 2018
    Assignee: Intel Corporation
    Inventors: Michael W. Leddige, Stephen H. Hall, Chaitanya Sreerama, Olufemi B. Oluwafemi, Antonio Zenteno Ramirez, Maynard C. Falconer
  • Patent number: 10070272
    Abstract: A method, an apparatus, and a computer-readable medium for delivering content to end user via shared broadcast are provided. The apparatus may be a UE that determines to acquire a MBMS service. The UE tunes to a frequency provided by a first MNO to which the UE is not a subscriber in order to receive the MBMS service via a carrier shared by the first MNO and at least one other MNO. The UE receives the MBMS service on the frequency via the carrier shared by the first MNO and the at least one other MNO. The shared carrier may have a common SFN timing with respect to the first MNO and the at least one other MNO. The shared carrier may include a shared MBMS SDL carrier. The shared carrier may include a standalone shared carrier for receiving the MBMS service and control information associated with the MBMS service.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: September 4, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Durga Prasad Malladi, Jun Wang, Yongbin Wei, Shimman Patel, Aleksandar Damnjanovic, Miguel Griot, Xiaoxia Zhang
  • Patent number: 10045348
    Abstract: A method and apparatus are provided for determining a resource for an acknowledgement signal by a user equipment (UE) in a wireless communication system. A method includes receiving an index associated with a plurality of resource blocks (RBs) for transmission of an uplink control signal in an operating bandwidth; and determining an RB for transmission of the acknowledgement signal, based on the index.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: August 7, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Aris Papasakellariou, Joon-Young Cho
  • Patent number: 10039140
    Abstract: One embodiment of the present invention relates to a method for device-to-device transreceiving a signal by a first device in a wireless communication system, wherein the method for transreceiving a signal comprises the steps of: receiving from a second device a discovery signal; determining the number of antenna ports associated with the transmission of the discovery signal; and decoding the discovery signal based on the number of antenna ports, wherein an initial value of a sequence constituting the DMRS is determined by a parameter related to a cell ID, and the value of the parameter related to the cell ID is selected from a range of values differing from values available to a physical cell ID and a virtual cell ID.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: July 31, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyukjin Chae, Seungmin Lee, Hakseong Kim, Hanbyul Seo
  • Patent number: 10021219
    Abstract: A method and apparatus for encoding feedback signal is provided. The method includes: encoding feedback signals of three carriers to output a bit sequence; and transmitting the bit sequence on a High Speed-Dedicated Physical Control Channel (HS-DPCCH). The encoding the feedback signals of the three carriers may specifically include: mapping the feedback signals of the three carriers into a codeword, in which the codeword can be selected from a codebook, and codewords in the codebook satisfy a particular code distance relationship. The method for jointly encoding feedback signals of three carriers in a Ternary Cell (TC) mode is provided. Feedback signals are transmitted over a single code channel. Therefore, power overhead is reduced, and system performance is improved.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: July 10, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Shuju Fan, Jing Li, Xueli Ma, Zongjie Wang
  • Patent number: 10009949
    Abstract: A method and apparatus for performing a state transition for Device to Device (D2D) communication are provided. The method includes determining whether D2D initiation is required, while a terminal is operating in a first or a second state defined by EPS (Enhanced Packet System) Mobility Management (EMM)-Deregistered and EPS Connection Management (ECM)-IDLE at a Non-Access Stratum (NAS) layer and Radio Resource Control (RRC)-IDLE. If the D2D initiation is required, the method includes transitioning to a third state defined by EMM-Registered and ECM/RRC-Connected and performing the D2D initiation through a mobile communication network. If a deactivation condition is satisfied or a D2D state update is completed in the third state, the method includes transitioning to a fourth state defined by EMM-Registered and ECM/RRC-IDLE, and if a state update or scheduling for D2D communication is required in the fourth state, the method includes transitioning to the third state.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: June 26, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Kyu Kim, Young-Bin Chang, Seung-Hoon Park, Sang-Kyu Baek, Sung-Jin Lee
  • Patent number: 10009207
    Abstract: A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: June 26, 2018
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 9998304
    Abstract: Methods and systems for estimating and mitigating OFDM interference to enable reliable communications with minimal a priori knowledge of the interfering OFDM signal are presented. Embodiments of the present invention hypothesize modulation symbols from a reference signal set, which may not be identical to the interference signal set, and compute a channel sequence to minimize an error between the observed samples and a product of the channel sequence and the hypothesized modulation symbols. The interfering OFDM signal may be estimated and mitigated with no reliance on knowledge of the interference signal set, although this may result in the inability to decode and demodulate the interfering OFDM signal when embodiments of the present invention are extended from single-input single-output systems to multiple-input single-output systems.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: June 12, 2018
    Assignee: TrellisWare Technologies, Inc.
    Inventors: Andreas Polydoros, Cenk Kose
  • Patent number: 9960832
    Abstract: Add-on apparatus dynamically enhancing frequency diversity of a main signal sent over an existing communication system, the system using a communication protocol to convey the main signal from a Tx end to an Rx end, the add-on apparatus comprising a Transmission Frequency Converter (TFC) at the Tx end operative while the system is transmitting the main signal, to at least once shift a given center frequency about which the system is transmitting, to at least one corresponding alternative center frequency, wherein the TFC and an Reception Frequency Converter at the Rx end share prior knowledge defining how each shift of the given center frequency is to be timed relative to at least one recognizable element within the known communication protocol and wherein the Transmission Frequency Converter is operative to use the prior knowledge to recognize the at least one recognizable element and to shift the center frequency accordingly.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: May 1, 2018
    Assignee: Elta Systems Ltd.
    Inventors: Yaakov Shoshan, Gil Koifman, Michael Elmakias
  • Patent number: 9954551
    Abstract: A packet processing system having a barrel compactor that extracts a desired data subset from an input dataset (e.g. an incoming packet). The barrel compactor is able to selectively shift one or more of the input data units of the input dataset based on individual shift values for those data units. Additionally, in some embodiments one or more of the data units are able to be logically combined to produce a desired logical output unit.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: April 24, 2018
    Assignee: Cavium, Inc.
    Inventors: Premshanth Theivendran, Weihuang Wang, Sowmya Hotha, Srinath Alturi
  • Patent number: 9942008
    Abstract: Systems and methods are provided for extending the range of a transmitter by time repetition. The systems and methods may include receiving, at the transmitter block, and input of signals corresponding to data for transmission. The systems and methods may further include repeating the signals, reordering the signals, and operating on the signals in such a way that an output of signals from the transmitter block is dependent on a time-varying function and corresponds to the data for transmission.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: April 10, 2018
    Assignee: Marvell International Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Lei Wang, Hui-Ling Lou
  • Patent number: 9930696
    Abstract: In orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) systems, a wireless transmit/receive unit (WTRU) selects a random access channel (RACH) and a phase for a constant amplitude zero auto correlation (CAZAC) sequence for RACH transmission. The WTRU then transmits a RACH transmission to a Node B via the selected RACH. Once the RACH transmission is detected, the Node B sends an acknowledgement (ACK) to the WTRU over an ACK channel. The Node B may transmit the ACK on a shared channel. The WTRU may ramp up transmit power while the RACH transmission is transmitted, or steps up transmit power of a subsequent RACH transmission. The RACH transmission and data transmission may be either time multiplexed or frequency multiplexed. A plurality of RACHs may be defined and one of the defined RACHs may be selected randomly or based on predetermined criteria.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: March 27, 2018
    Assignee: InterDigital Technology Corporation
    Inventor: Fatih M. Ozluturk
  • Patent number: 9930621
    Abstract: A method of transmitting data packets from a terminal (T) to a gateway receiver (GWR) over a channel shared with other terminals using an unslotted spread spectrum random access protocol, characterized in that transmission is performed at a transmit power level given by the sum of a deterministic term, function of a communication link budget, and of a random term, following a predetermined probability distribution. A method of operating a communication system, based on the method of transmitting data packets. A communication system and a terminal for implementing the methods.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: March 27, 2018
    Assignee: Agence Spatiale Europeenne
    Inventor: Riccardo De Gaudenzi
  • Patent number: 9912372
    Abstract: Variable bandwidth assignment and frequency hopping are employed to make efficient use of radio resources. Variable bandwidth assignment is achieved by dynamically allocating different numbers of subcarriers to different wireless communication devices depending on their instantaneous channel conditions. The frequency hopping patterns are determined “on-the-fly” based on the current bandwidth assignments. The bandwidth assignments and frequency hopping patterns are signaled to the wireless communication devices in a scheduling grant.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: March 6, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Erik Dahlman, Ylva Jading, Per Skillermark, Stefan Parkvall
  • Patent number: 9906278
    Abstract: Mixed mode operations within multiple user, multiple access, and/or MIMO wireless communications. Certain communication systems can include wireless communication devices of various capabilities therein (e.g., IEEE Task Group ac (TGac VHT), IEEE 802.11 amendment TGn, IEEE 802.11 amendment TGa, and/or other capabilities, etc.). In one manner of classification, wireless communication devices having legacy and newer/updated capabilities may inter-operate with one another, operate within a common region, and/or communicate via a common access point (AP). Coordination of such wireless communication devices (e.g., legacy and newer/updated) provides for their respective operation on a same set of clusters in accordance with various operational modes including: (1) time dividing medium access between the wireless communication devices of various capabilities, (2) assigning primary cluster(s) for a first capability set and assigning non-primary cluster(s) for a second capability set, etc.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: February 27, 2018
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Peiman Amini, Matthew James Fischer, Vinko Erceg, Joonsuk Kim, Joseph Paul Lauer
  • Patent number: 9906343
    Abstract: Various embodiments are generally directed to an apparatus, method and other techniques to determine a bandwidth in a frequency band to communicate information to stations, determine an Orthogonal Frequency-Division Multiple Access (OFDMA) tone allocation scheme based on the bandwidth, the OFDMA tone allocation scheme to include one or more resource units each comprising a plurality of tones and each having a fixed location in the bandwidth, and communicate information to the stations based on the OFDMA tone allocation scheme.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: February 27, 2018
    Assignee: INTEL IP CORPORATION
    Inventors: Shahrnaz Azizi, Thomas J. Kenney, Eldad Perahia, Robert Stacey
  • Patent number: 9893920
    Abstract: A signal processing circuit comprising a clip-generation-block. The clip-generation-block is configured to receive an input-signal; and determine a clip-signal that comprises only values of the input-signal that exceed a clipping-threshold. The signal processing circuit also comprises a scaling-block configured to apply a scaling-factor to the clip-signal in order to generate a scaled-clip-signal, wherein the scaling-factor is greater than one; and an adder configured to provide a clipped-signal based on a difference between the scaled-clip-signal and the input signal.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: February 13, 2018
    Assignee: NXP B.V.
    Inventors: Nur Engin, Audrey Christine Andrée Cuenin
  • Patent number: 9887858
    Abstract: The present solution discloses a method and apparatus for controlling demodulation reference signal allocation of a user equipment by utilizing a cyclic shift subset determined for demodulation reference signal multiplexing orders supported by the user equipment. Within the cyclic shift subset, demodulation reference signal resources that cause the most significant interference to each other are identified, and cyclic shifts corresponding to the identified demodulation reference signal resources, are linked with as orthogonal complementary multiplexing resources as possible. If more than one cyclic shift subsets are determined for a demodulation reference signal multiplexing order, at least one cyclic shift subset is ignored for said demodulation reference signal multiplexing order.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: February 6, 2018
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Kari Juhani Hooli, Esa Tapani Tiirola, Kari Pekka Pajukoski, Timo Erkki Lunttila
  • Patent number: 9882761
    Abstract: Apparatuses (and methods of manufacturing same), systems, and methods for channel interpolation/estimation and/or frequency tracking suitable for a receiver in a high speed single frequency network (HS-SFN) scenario are described. In one aspect, an estimated frequency offset (FO) correction is calculated for a received signal using at least an FO estimation provided by an automatic frequency control (AFC) in a first feedback loop and a channel estimate is calculated using at least the estimated FO and one or more channel parameter estimates from the AFC in a second feedback loop. In another aspect, a phase locked loop (PLL) receives an lth orthogonal frequency division multiplexing (OFDM) symbol and produces a per-tap phase value for each tap i of the lth OFDM symbol. The per-tap phase values of the lth OFDM symbol are used to generate the PLL output, which is also used as input to a feedback loop.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: January 30, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Binnan Zhuang, Jung Hyun Bae, Dongwoon Bai, Jungwon Lee
  • Patent number: 9883460
    Abstract: Method and Apparatus for performing power control on the power control commands transmitted on a forward link in a wireless communication system. The power level of the power control bits on the forward link are adjusted in response to power commands received on the reverse link. The mobile station measures the power level of the adjusted power control bits to measure the quality of the forward link.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: January 30, 2018
    Assignee: QUALCOMM Incorporated
    Inventor: Stein Arne Lundby
  • Patent number: 9876611
    Abstract: A method for transmitting packets by a transmitter in a wireless communication network and retransmitting the packets not received correctly by receivers is discussed. The method includes transmitting the packets to at least two receivers, receiving reception acknowledgement response signals including ACK or NACK signals for the packets transmitted to the receivers, analyzing patterns of the received reception acknowledgement response signals in accordance with a number of the ACK or NACK signals, differently index coding the packets which are not received correctly by each receiver, and retransmitting the index-coded packets.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: January 23, 2018
    Assignee: KOREA RAILROAD RESEARCH INSTITUTE
    Inventors: Sang Won Choi, Ju Yeop Kim, Yong Soo Song, Yong Gyu Kim
  • Patent number: 9876662
    Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: January 23, 2018
    Assignee: Wi-Fi One, LLC
    Inventors: Dae Won Lee, Dong Wook Roh, Byeong Woo Kang, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim
  • Patent number: 9860099
    Abstract: Transmitting a frame may include determining a numerology according to a channel bandwidth, indicating the numerology in a field of a frame, and transmitting the frame using the numerology. Receiving a frame may include receiving a preamble of a frame, determining a numerology using the preamble, and receiving later portions of the frame using the numerology. Transmitting a frame may include, for a transmission time slot, determining a value of a first subcarrier of a first Space-Time Stream (STS), determining a value of a second subcarrier of the first STS, and determining, according to complex conjugates or negative complex conjugates of the values of the first and second subcarriers of the first STS, respective values of second and first subcarriers of a second STS. Transmitting a constellation point of a frame may be performed using an orphan subcarrier pair.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 2, 2018
    Assignee: NEWRACOM, INC.
    Inventors: Yujin Noh, Dae Won Lee, Sungho Moon, Jae Hyun Ahn, Hee Jung Yu, Minho Cheong
  • Patent number: 9853715
    Abstract: The present disclosure describes the system and methods for providing broadband internet access to homes and enterprises using a network of aerial platforms such as drones/UAVs/balloons. The drone communication system is composed of an antenna sub-system, a radio sub-system and a data switching sub-system. Drones form and point beams toward ground terminals in different areas in a space division multiple access scheme. Ground terminals are composed of an antenna sub-system and a radio sub-system. Ground terminals search for the drone from which they receive the strongest signals. Drone and ground terminals comprise of methods and systems to calibrate receive and transmit antenna elements. Drone radio sub-system keeps track of the drone's position and orientation changes and adjust drone's antenna beam accordingly to point to the same location on the ground as the drone moves.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: December 26, 2017
    Assignee: Ubiqomm LLC
    Inventor: Ahmad Jalali