Quadrature Carriers Patents (Class 370/206)
  • 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: 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: 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: 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: 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: 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: 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: 9853808
    Abstract: An initial cell searching method includes: receiving at least one frame data sequence including synchronization channel signals; performing a correlation process between all synchronization sequences stored in user equipment and the received at least one data sequence to obtain correlation sequences, and calculating correlation power sequences corresponding to each of the correlation sequences; searching a highest peak and a secondary peak for each of the correlation power sequences, and recording the highest peak and corresponding position and the secondary peak and corresponding position; and determining a target cell ID based on a first target sequence.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: December 26, 2017
    Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.
    Inventors: Yongfang Zhou, Fajun Yan, Xiaojian Dong
  • 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
  • Patent number: 9838077
    Abstract: A method is for processing an analog channel signal from a transmission channel. The analog channel signal conveys frames, the transmission channel being linear and cyclostationary for a duration of a frame. The method may include converting of the analog channel signal into a digital channel signal, and performing channel estimations for the frame based upon the digital channel signal to generate a sequence of N transfer functions of the transmission channel. Each of the sequence of N transfer functions may be respectively associated with N successive time slices. The method may include decoding at least some symbols of the frame using, for each of the symbols, a transfer function associated with a successive time slice including a respective symbol.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: December 5, 2017
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Pierre Demaj, Yoann Bouvet
  • Patent number: 9825786
    Abstract: A method for transmitting and receiving data in a communication system includes adding symbols to both ends of a transmitted signal block, filtering the transmitted signal block, removing the symbols from the filtered transmitted signal block and transmitting the transmitted signal block to a receiver through a channel. A transmitter includes a controller configured to add symbols to both ends of a transmitted signal block through the symbol adder, filter the transmitted signal block, remove the symbols from the filtered transmitted signal block through the symbol remover, and transmit the transmitted signal block through the transceiver to a receiver through a channel. A receiver includes a controller configured to add symbols to both ends of the received signal block through the symbol adder, filter the received signal block and reconstruct data from the received signal block.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: November 21, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Seongbeom Hong
  • Patent number: 9825844
    Abstract: An interconnection system comprising a plurality of nodes, each comprising at least two ports, and a plurality of links configured to interconnect ports among the nodes to form a hierarchical multi-level ring topology, wherein the ring topology comprises a plurality of levels of rings including a base ring and at least two hierarchical shortcut rings, and wherein each node connected to a higher-level shortcut ring is also connected to all lower-level rings including the base ring.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: November 21, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Iulin Lih, William Lynch
  • Patent number: 9806823
    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: November 14, 2016
    Date of Patent: October 31, 2017
    Assignee: INPHI CORPORATION
    Inventors: Mario Alejandro Castrillon, Damian Alfonso Morero, Mario Rafael Hueda
  • Patent number: 9800442
    Abstract: An estimating method for estimating a phase difference of two frames is provided. The estimating method includes: providing a first sequence according to a header of a first frame; providing a second sequence according to a header of a second frame, wherein the first and second frames are successive frames, and the first and second sequences are pseudo noise sequences; performing a correlation calculation according to the first and second sequences to generate a plurality of correlation values; and estimating the phase difference between the first and second frames according to the correlation values.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: October 24, 2017
    Assignee: MStar Semiconductor, Inc.
    Inventor: Yu-Hsien Ku
  • Patent number: 9794822
    Abstract: A multi-carrier communication system such as an OFDM or DMT system has nodes which are allowed to dynamically change their receive and transmit symbol rates, and the number of carriers within their signals. Changing of the symbol rate is done by changing the clocking frequency of the nodes' iFFT and FFT processors, as well as their serializers and deserializers. The nodes have several ways of dynamically changing the number of earners used. The selection of symbol rate and number of earners can be optimized for a given channel based on explicit channel measurements, a priori knowledge of the channel, or past experience. Provision is made for accommodating legacy nodes that may have constraints in symbol rate or the number of carriers they can support.
    Type: Grant
    Filed: November 22, 2014
    Date of Patent: October 17, 2017
    Assignee: The Connectivity Patent Trust
    Inventor: William J. McFarland
  • Patent number: 9780899
    Abstract: A radio communication apparatus that performs radio communication according to a multicarrier scheme includes: a transmitting unit including a null inserting unit that dispersedly arranges null symbols in a two-dimensional space of time and frequency in radio data, and a differential modulating unit that performs differential modulation on a data symbol part other than the null symbols; and a receiving unit including an interference measuring unit that measures interference power for a data symbol that is a measurement target by using a null symbol adjacent to the data symbol in the two-dimensional space of time and frequency, and a delay detecting unit that performs weighting on each data symbol according to the interference power measured for each data symbol and that performs delay detection between data symbols.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: October 3, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazumasa Suzuki, Kazuaki Ishioka
  • Patent number: 9768938
    Abstract: A communication method of a terminal apparatus that performs communications with a base station using a plurality of frequency channels, comprising the steps of: measuring reception quality; selecting part of frequency channels as selection channels from the plurality of frequency channels; generating first information for specifying the selection channels, second information indicating reception quality of the selection channels, and third information indicating one reception quality of whole of the plurality of frequency channels, and transmitting each of the first, second and third information to the base station, wherein the second information indicating the reception quality is information for specifying at least one of a modulation scheme and a coding rate.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: September 19, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Toshizo Nogami, Takashi Onodera, Hidekazu Tsuboi, Shoichi Shitara
  • Patent number: 9755876
    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: November 13, 2014
    Date of Patent: September 5, 2017
    Assignee: TQ Delta, LLC
    Inventor: Marcos C. Tzannes
  • Patent number: 9735999
    Abstract: An interface is provided for processing digital signals in a standardized format in a distributed antenna system. One example includes a unit disposed in a distributed antenna system. The unit includes an interface section and an output section. The interface section is configured for outputting a first complex digital signal and a second complex digital signal. The first complex digital signal is generated from a digital signal in a standardized format received from a digital base station. The output section is configured for combining the first complex digital signal and the second complex digital signal into a combined digital signal. The output section is also configured for outputting the combined digital signal. The combined digital signal comprises information to be wirelessly transmitted to a wireless user device.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: August 15, 2017
    Assignee: CommScope Technologies LLC
    Inventors: Thomas Kummetz, Christopher G. Ranson
  • Patent number: 9735986
    Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: August 15, 2017
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 9730248
    Abstract: Embodiments herein relate to a communication device and a method performed by the communication device for enabling improved random access transmissions in a radio communications network. The communication device obtains information indicating a first random access channel configuration and also obtains information indicating at least a second random access channel configuration. Then, the communication device determine whether or not the at least second random access channel configuration is orthogonal to the first random access channel configuration. Furthermore, the communication device uses the result of the determining to determine the time required by the communication device to configure the at least second cell. Embodiments herein also relate to a first network node and a method therein for enabling improved random access transmissions in a radio communications network.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: August 8, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Imadur Rahman, Muhammad Kazmi
  • Patent number: 9722827
    Abstract: A wireless access point or other transmitter can be configured to inject a supplemental signal into a data modulated carrier signal. In some examples, a transmitter system includes an antenna, a primary modulator, and a supplemental modulator. The primary modulator receives a baseband data signal and a carrier signal and outputting to the antenna a data modulated carrier signal according to a communications protocol. The supplemental modulator injects a supplemental signal into the data modulated carrier signal by distorting the data modulated carrier signal within an error bound of the communications protocol. A corresponding receiving system includes an antenna and a supplemental signal detector for detecting the supplemental signal by detecting the distortion within the data modulated carrier signal.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: August 1, 2017
    Assignee: Ixia
    Inventor: Stephen Samuel Jackson
  • Patent number: 9723456
    Abstract: Disclosed herein is a broadcast signal transmitter. A broadcast signal transmitter according to an embodiment of the present invention includes an input formatting module configured to perform baseband formatting and to output the data of at least one Physical Layer Pipe (PLP), a BICM module configured to perform error-correction processing on the PLP data, a framing and interleaving module configured to interleave the PLP data and to generate a signal frame, and a waveform generation module configured to insert a preamble into the signal frame and to generate a broadcast signal by performing OFDM modulation.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: August 1, 2017
    Assignee: LG Electronics Inc.
    Inventors: Jaehyung Kim, Woosuk Ko, Chulkyu Mun, Sungryong Hong
  • Patent number: 9722846
    Abstract: Disclosed herein is a method of receiving a broadcast signal. The method comprises receiving the broadcast signal; an Orthogonal Frequency Division Multiplexing (OFDM) demodulating on the received broadcast signal; parsing at least one signal frame from the demodulated broadcast signal to extract service data or service component data; converting the service data or service component data into bits; decoding the converted bits; and outputting a data stream comprising the decoded bits.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: August 1, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongseob Baek, Woosuk Ko, Sungryong Hong
  • Patent number: 9723634
    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: September 27, 2016
    Date of Patent: August 1, 2017
    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: 9713137
    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: July 18, 2017
    Assignee: Wi-LAN, Inc.
    Inventors: Kenneth L. Stanwood, Israel Jay Klein, George Lin, An Chen
  • Patent number: 9705636
    Abstract: A wireless communication method and apparatus are provided for selecting quality-reporting sub-carrier bands based on sub-carrier band quantity information received from a base station. The method includes generally four steps. First, from a base station, information indicating quantity of sub-carrier bands is acquired. Second, channel quality of each of a plurality of sub-carrier bands within a communication band is measured from a received signal. Third, sub-carrier bands are selected from the plurality of sub-carrier bands, wherein quantity of the selected sub-carrier bands corresponds to the quantity of sub-carrier bands indicated by the acquired information. Fourth, information indicating channel quality of the selected sub-carrier bands is reported to the base station.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: July 11, 2017
    Assignee: Optis Wireless Technology, LLC
    Inventors: Akihiko Nishio, Jun Cheng
  • Patent number: 9674020
    Abstract: Provided are a transmitting apparatus, a receiving apparatus and methods of controlling these apparatuses. The transmitting apparatus includes: a structurer configured to generate a transmission stream comprising an orthogonal frequency division multiplexing (OFDM) symbol and add signaling data to the transmission stream; and a transmitter configured to insert at least one pilot into the OFDM symbol, determine a number of active carriers to be included in a frequency spectrum, corresponding to the OFDM symbol into which the pilot is inserted, which exists in a preset spectrum mask, and map the OFDM symbol, into which the pilot is inserted, onto the active carriers of the determined number, and transmit the mapped OFDM symbol.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: June 6, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-ho Oh, Hak-ju Lee, Jae-hyeon Bae
  • Patent number: 9674866
    Abstract: Disclosed is a subframe scheduling method, which includes: a network side configures a transmission mode, wherein the transmission mode includes at least a multi-subframe scheduling transmission way; the network side selects a corresponding control information format according to the transmission mode, transmits Downlink Control Information (DCI) corresponding to the control information format, and then performs subframe scheduling according to the DCI. Further disclosed are a subframe scheduling system, a network device and a terminal. By means of the disclosure, the multi-subframe scheduling can be used under the condition in which user channel state information is relatively stable, thereby being able to reduce control signalling overheads, save system resources and improve the scheduling flexibility.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: June 6, 2017
    Assignee: ZTE Corporation
    Inventors: Xincai Li, Bo Dai, Shuqiang Xia, Jing Shi
  • Patent number: 9654309
    Abstract: In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols that produce zero cross-correlation energy. Channel communication can accordingly be simplified as the zero cross-correlation property allows for channel estimation without a matrix inversion.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: May 16, 2017
    Assignee: SONY CORPORATION
    Inventor: Geoffrey Ye Li
  • Patent number: 9639733
    Abstract: Techniques for fully-differential multi-phase scanning in capacitive fingerprint applications are described herein. In an example embodiment, a system comprises a capacitive fingerprint sensor array and a processing device coupled to the capacitive fingerprint sensor array. The processing device is configured at least to: scan the capacitive fingerprint sensor array in a fully-differential multi-phase mode; receive a plurality of measurements that represents a portion of finger on the capacitive fingerprint sensor array; and generate a fingerprint image for the portion of the finger based on the plurality of measurements. In some embodiments, a capacitive fingerprint sensor array may include receive (RX) electrodes and one or more reference electrodes configured to detect noise, where the one or more reference electrodes have width that is substantially equal to the width of the RX electrodes, but the one or more reference electrodes are disposed at a smaller pitch than the RX electrodes.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: May 2, 2017
    Assignee: Cypress Semiconductor Corporation
    Inventors: Viktor Kremin, Spartak Mankovskyy, Roman Ogirko
  • Patent number: RE46477
    Abstract: According to the present invention a transmitter and a transmitting method for communicating data symbols over a communication channel, for example, according to the CDMA system is presented. The transmitter (24, 25) comprises means (9) for spreading each data symbol with a respective spreading code, wherein the spreading codes are mutually orthogonal. Means (10) for scrambling are provided to scramble each spread symbol with a respective scrambling code, the scrambling codes respectively having the same length as the spreading codes. Furthermore, means (11) for the transmission of the spread and scrambled symbols are provided. According to the present invention the means (10) for scrambling are provided with a plurality of different scrambling codes, which can be used simultaneously within the same link.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: July 11, 2017
    Assignee: SONY CORPORATION
    Inventors: Richard Stirling-Gallacher, Jens-Uwe Jürgensen