Different Phases Of Same Frequency Carrier Patents (Class 455/60)
  • Patent number: 11728843
    Abstract: A method for mitigating interference in a frequency hopping channel system based on codeword metrics obtained during decoding of codewords. The method includes decoding a plurality of codewords using a particular error control coding method. Each of the plurality of codewords includes portions received from plurality of channels in the frequency hopping channel system. For each decoded codeword, one or more codeword metrics are obtained based on the cost of correcting errors during decoding of the plurality of codewords. Based on the codeword metrics, one or more channel metrics are inferred. Based on the inferred one or more channel metrics, a reliability metric of a particular channel is reduced, or incoming symbols received from the particular channel are ignored during decoding.
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: August 15, 2023
    Assignee: L3HARRIS TECHNOLOGIES, INC.
    Inventors: Joshua D. Gunn, Ryan W. Hinton, Edwin J. Hemphill
  • Patent number: 11711178
    Abstract: An EVM measurement value is appropriately determined while CPE/ICI correction is taken into account. In a measurement apparatus (300), an EVM measurer (305) measures a modulation quality of a signal transmitted from a transmission apparatus. An EVM determiner (306) determines whether or not the measurement value of the modulation quality is equal to or less than a first requirement value, in a case where correction relating to a phase noise of the transmission apparatus is necessary in a reception apparatus. The first requirement value herein is higher than a second requirement value used in the determination of the measurement value in a case where the correction relating to the phase noise of the transmission apparatus is unnecessary in the reception apparatus.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: July 25, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Shotaro Maki, Hidetoshi Suzuki, Lilei Wang
  • Patent number: 11711141
    Abstract: A method of operating a first infrastructure equipment of a wireless communications network comprising a core network part, the first infrastructure equipment, a second infrastructure equipment acting as a backhaul relay node between the first infrastructure equipment and the core network part, and a downstream wireless communications device. The method comprising receiving from the second infrastructure equipment an indication of a first set of communications resources, allocating resource elements of the first set of communications resources for receiving first data for transmission to the core network part from the downstream wireless communications device, and receiving second data transmitted by the second infrastructure equipment on one or more resource elements within a second set of communications resources, the second set of communications resources different from the first set of communications resources.
    Type: Grant
    Filed: May 1, 2019
    Date of Patent: July 25, 2023
    Assignee: SONY CORPORATION
    Inventors: Kazuyuki Shimezawa, Samuel Asangbeng Atungsiri, Yuxin Wei
  • Patent number: 11621726
    Abstract: A multidimensional multilevel coding (MLC) encoder comprises a soft forward error correction (FEC) encoder receiving first bits for generating soft FEC encoded bits, a redundancy generator receiving a subset of the soft FEC encoded bits for generating redundant bits, and a hard FEC encoder receiving second bits for generating hard FEC encoded bits. Combinations of the soft FEC encoded bits, the redundant bits, and the hard FEC encoded bits form labels for mapping to a plurality of constellation points. A MLC decoder comprises a redundancy decoder, a soft FEC decoder and a hard FEC decoder. The redundancy decoder combines log-likelihood-ratios (LLR) of soft FEC encoded bits received from the MLC encoder to allow the soft FEC decoder to produce decoded bits. Decoding of hard FEC encoded bits by the hard FEC decoder is conditioned on values of the bits decoded by the soft FEC decoder.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: April 4, 2023
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Chunpo Pan, Deyuan Chang, Frank Robert Kschischang, Yoones Hashemi Toroghi
  • Patent number: 11611156
    Abstract: Aspects of the subject disclosure may include, for example, receiving, by a double trombone shifter device, signals relating to one or more crossed-dipole radiating elements of an antenna system, performing, by the double trombone shifter device, polarization rotation of the signals to derive output signals having polarizations that are rotated in a manner that results in a virtual physical rotation of the one or more crossed-dipole radiating elements, and providing, by the double trombone shifter device, the output signals to enable avoidance of interference. Other embodiments are disclosed.
    Type: Grant
    Filed: September 2, 2022
    Date of Patent: March 21, 2023
    Assignee: ISCO International, LLC
    Inventors: Amr Abdelmonem, Anthony Teillet
  • Patent number: 11569579
    Abstract: A wireless data transmission apparatus is disclosed, comprising one or more antennas for transmitting data as polarised electromagnetic radiation, and polarisation control means for controlling an axial ratio and a tilt angle of the polarised electromagnetic radiation such that the axial ratio and tilt angle conveys information about the data being transmitted. A corresponding wireless data receiving apparatus is also disclosed. In some embodiments, the one or more antennas comprises a patch antenna, and the polarisation means may comprise a mechanism for varying an electrical length of the angled slot. By utilising the tilt angle and axial ratio of polarised electromagnetic radiation to convey information to the receiver, the spectral efficiency of the system can be increased. A further increase in spectral efficiency may be obtained by using the polarisation control means to modulate first and second carrier waves, and transmitting different data on the first and second carrier waves.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: January 31, 2023
    Assignee: University of Surrey
    Inventors: Pei Xiao, Timothy Brown, James Kelly, Yasin Kabiri Isfahani, Rahim Tafazolli
  • Patent number: 11539557
    Abstract: A first wireless device may receive, from a second wireless device, a transmission associated with an MLC scheme. The MLC scheme may include a plurality of bits with at least one first bit corresponding to a first level of the plurality of bits and at least one second bit corresponding to a second level of the plurality of bits. The at least one first bit may be coded with a first level of complexity, but the at least one second bit may be coded with either the first level of complexity or a second level of complexity, where the first level of complexity may be a higher level of complexity than the second level of complexity. The first wireless device may decode the at least one first bit and the at least one second bit using a decoder having a corresponding level of complexity.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: December 27, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Daniel Paz, Amit Bar-Or Tillinger, Michael Levitsky, Assaf Touboul, Shay Landis, Ronen Shaked
  • Patent number: 11515652
    Abstract: Aspects of the subject disclosure may include, for example, receiving, by a double trombone shifter device, signals relating to one or more crossed-dipole radiating elements of an antenna system, performing, by the double trombone shifter device, polarization rotation of the signals to derive output signals having polarizations that are rotated in a manner that results in a virtual physical rotation of the one or more crossed-dipole radiating elements, and providing, by the double trombone shifter device, the output signals to enable avoidance of interference. Other embodiments are disclosed.
    Type: Grant
    Filed: May 26, 2022
    Date of Patent: November 29, 2022
    Assignee: ISCO International, LLC
    Inventors: Amr Abdelmonem, Anthony Teillet
  • Patent number: 11484208
    Abstract: The present technology relates to the field of medical monitoring. Patient monitoring systems and associated devices, methods, and computer readable media are described. In some embodiments, a patient monitoring system includes one or more sensors configured to capture first data related to a patient and a monitoring device configured to receive the first data. In these and other embodiments, the patient monitoring system can include an image capture device configured to capture second data related to the patient. In these and still other embodiments, the one or more sensors can be configured to instruct the patient monitoring system to display the second data.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: November 1, 2022
    Assignee: Covidien LP
    Inventor: Paul S. Addison
  • Patent number: 11425732
    Abstract: A method for communication includes obtaining channel estimates that approximate a response of a communication channel between a transmitter and one or more receivers, and performing an iterative process for improving one or more predefined quality metrics of communication between the transmitter and the one or more receivers. The iterative process includes mapping at least the channel estimates into a transmission scheme of the transmitter using a mapping policy, causing the transmitter to apply the transmission scheme, obtaining, based on signals transmitted from the transmitter to the one or more receivers using the transmission scheme, values of the one or more predefined quality metrics, and modifying the mapping policy to improve the quality metrics.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: August 23, 2022
    Assignee: MARVELL ASIA PTE LTD
    Inventor: Kalpendu Pasad
  • Patent number: 9219510
    Abstract: A signal receiving device obtains information data based on a plurality of signals received at a plurality of antennas. The signal receiving device is divided into a first receiving unit and a second receiving unit. The first receiving unit carries out certain part of an entire receiving process, and the second receiving unit carries out the remaining part of the receiving process. The first receiving unit demodulates and synthesizes the received signals and decodes the synthesized signal to recover received information data. The first receiving unit modulates the received information data to obtain a modulation signal and transmits the modulation signal to the second receiving unit via a transmission cable. The second receiving unit recovers the received information data by demodulating the modulation signal received via the transmission cable, and obtains the information data by decoding the recovered information data.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: December 22, 2015
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventor: Hiroji Akahori
  • Patent number: 9197264
    Abstract: Methods, systems, and devices are described for reducing interference for wireless communication in a wireless device with multiple receive antennas. In aspects for reducing interference, a combined signal may be generated by combining a plurality of received signals from a plurality of respective receive antennas of the wireless device, for example, using one or more different types of combining A common distortion of the plurality of received signals may be estimated based at least in part on the combined signal, and interference reduction may be performed on one or more of the plurality of received signals based at least in part on the estimated common distortion.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: November 24, 2015
    Assignee: QUALCOMM, Incorporated
    Inventors: Taesang Yoo, Wooseok Nam, Roberto Rimini, Jibing Wang, Yongbin Wei, Muhammad Sayed Khairy Abdelghaffar, Joseph Patrick Burke
  • Patent number: 8995916
    Abstract: A wireless transmitter controls the number of transmission beams to be formed for transmitting a data stream depending on the number of data streams to be transmitted, and a wireless receiver selectively receives any one or more of the transmission beam from the transmission beams. In this manner, by changing the number of transmission beams (the original number of beams selectable on the receiving side) to be formed depending on the number of transmitting data streams, high throughput characteristics by a low interbeam correlation at the time of the multistream transmission and a large directional gain at the time of a single stream may be achieved.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: March 31, 2015
    Assignee: Fujitsu, Limited
    Inventors: Masafumi Tsutsui, Hiroyuki Seki
  • Patent number: 8948154
    Abstract: Techniques for supporting data transmission based on a low-complexity transmission scheme are described. In one design, a first user equipment (UE) generates a first transmission for a single subcarrier assigned to the first UE. The first UE sends the first transmission on the single subcarrier concurrently with a SC-FDMA transmission sent on multiple subcarriers by a second UE. In one design, the first UE generates a continuous sinusoidal signal at a frequency corresponding to the single subcarrier. The first UE modulates the continuous sinusoidal signal with data symbols and reference symbols. In one design, the first transmission includes a cyclic prefix followed by a useful portion in each symbol period and has phase discontinuity at symbol boundary. A base station processes a received signal to recover the first transmission sent by the first UE and the SC-FDMA transmission sent by the second UE.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: February 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Gaal, Ravi Palanki
  • Patent number: 8942327
    Abstract: The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: January 27, 2015
    Assignee: Apple Inc.
    Inventors: Ming Jia, Jianglei Ma, Peiying Zhu, Wen Tong, Curt Dodd
  • Patent number: 8897455
    Abstract: A disclosed method selects a plurality of fewer than all of the channels of a multichannel signal, based on information relating to the direction of arrival of at least one frequency component of the multichannel signal.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: November 25, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Erik Visser, Ernan Liu
  • Patent number: 8849212
    Abstract: A wireless transmitter capable of transmitting a data stream to a wireless receiver, the wireless transmitter includes a plurality of transmitting antennas; and a scheduler controls to increase the number of candidate beams selectable for transmitting said data stream depending on the number of data streams to be transmitted from said transmitting antennas becoming small, wherein said beams are formed by predetermined number of the plurality of transmitting antennas.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: September 30, 2014
    Assignee: Fujitsu Limited
    Inventors: Masafumi Tsutsui, Hiroyuki Seki
  • Patent number: 8849211
    Abstract: A wireless transmission method capable of transmitting a data stream between a wireless transmitter having a plurality of transmitting antennas and a wireless receiver, the wireless transmission method includes controlling to increase the number of transmission beams to be formed for transmitting said data stream depending on the number of data streams to be transmitted from said transmitting antennas becoming small, and receiving any one or more transmission beam from said transmission beams by said wireless receiver, wherein said transmission beams are formed by predetermined number of the plurality of transmitting antennas.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: September 30, 2014
    Assignee: Fujitsu Limited
    Inventors: Masafumi Tsutsui, Hiroyuki Seki
  • Patent number: 8838047
    Abstract: A dynamic radio frequency (RF) front end includes an antenna array, a power amplifier structure, and a low noise amplifier structure. The power amplifier structure generates a plurality of outbound RF signals from an outbound RF signal and provides the plurality of outbound RF signals to the antenna array. Each of the plurality of outbound RF signals has a different transmit phase rotation. The low noise amplifier structure receives a plurality of inbound RF signals from the antenna array and outputs one of the plurality of inbound RF signals based on a favorable phase relationship with respect to the outbound RF signal. Each of the plurality of inbound RF signals has a different receive phase rotation.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: September 16, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Amin Shameli
  • Patent number: 8792458
    Abstract: A subscriber access unit includes a transceiver for providing wireless communication of digital signals. The digital signals are communicated to a base station using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes. Orthogonal subchannels are made available by the base station within each CDMA RF channel. A bandwidth manager is connected to the transceiver, and when the transceiver is actively sending data, at least one orthogonal subchannel is allocated by the base station on an as-needed basis. The number of orthogonal subchannels being allocated changes during a given session. The transceiver, when powered on but not actively sending data, provides an idling mode connection on a reverse link. The idling mode connection is based on an orthogonal subchannel shared with at least one other subscriber access unit, but utilizes different time slots of the shared orthogonal subchannel.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: July 29, 2014
    Assignee: Intel Corporation
    Inventor: James A. Proctor, Jr.
  • Patent number: 8767845
    Abstract: Various embodiments are directed to systems and methods for processing signals comprising a first component and a second component. A bandwidth of the first component may be centered at a center frequency. A bandwidth of the second component may be offset from the center frequency by an offset frequency such that at least a portion of the bandwidth of the second component overlaps a skirt of the first component. In various embodiments, a transmitter may split a single signal to generate the first and second components, shift the frequency of the second component, recombine and transmit the two components. Also, in various embodiments, a receiver may receive the signal and derive the first and second components by correcting for cross-interference.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: July 1, 2014
    Assignee: The Aerospace Corporation
    Inventor: Rajendra Kumar
  • Patent number: 8761835
    Abstract: The present invention relates to a wireless communication node (20A) connected to an antenna part (10A) with a plurality of antenna elements (1A, 2A, 3A, 4A) and antenna ports (11A1, 11A2, 11A3, 11A4) over feeder ports (21A1, 21A2, 21A3, 21A4). It comprises signal analyzing means (21A) adapted to analyze a signal received from a mobile station, and to, for each pair of antenna elements (1A, 2A, 3A, 4A), calculate the respective phase difference or phase angle between the signals from the elements of the pair, phase progression function handling means (26A) for calculating a phase progression function over the antenna ports, connection combination handling means (24A) adapted to find all possible combinations of connections between the antenna ports and the feeder ports and the corresponding phase angles or phase differences.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: June 24, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Fredrik Athley, Mikael Coldrey, Sven Petersson
  • Patent number: 8744031
    Abstract: Provided are a device and method for estimating carrier frequency offset of OFDM signals transmitted and received through a plurality of polarized antennas that may accurately estimate carrier frequency offset used for carrier frequency synchronization acquisition when there is interference between polarized waves.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: June 3, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jun-Woo Kim, Young-Jo Bang, Kyung-Yeol Sohn, Se-Young Cho, Youn-Ok Park
  • Patent number: 8670404
    Abstract: A technique for improving the efficiency of downloading transmission data is disclosed. An information downloading apparatus downloads differing sets of information to predetermined groups to which a mobile terminal may belong. This apparatus includes a channel selecting unit for selecting from plural information channels an information channel for transmitting transmission data and a transmitting unit for transmitting transmission data using the selected information channel. The channel selecting unit selects an information channel so that sets of transmission data with differing destination addresses may be transmitted through differing information channels. The transmitting unit transmits to each group, through a control channel, information pertaining to whether a set of transmission data exists, the information channel to be used if the set of transmission data exists, and the data length of the set of transmission data. The control channel includes time slots that are associated with the groups.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: March 11, 2014
    Assignee: Fujitsu Limited
    Inventors: Kazuo Kawabata, Yoshiharu Tajima
  • Patent number: 8655282
    Abstract: A frontend receiver of a user equipment (UE) is configured with multiple transform operations assigned to separate sets of cells. One set of cells includes the serving cell of the UE and at least one additional cell within a first offset range of the serving cell. Another set or sets of cells include additional interferer cells within another offset range of the serving cell. After tracking the common frequency/timing offsets of each set of cells the assigned transform operation for that set transforms the time domain samples into frequency domain symbols. The individual frequency/timing offsets for each cell within the set are then tracked.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: February 18, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Xiliang Luo, Taesang Yoo, Tao Luo
  • Patent number: 8644765
    Abstract: In one or more aspects data packets are iteratively transmitted to a receiver using predefined spatial mapping matrices, channel estimates are received from the receiver responsive to the iteratively transmitted data packets, and one of the predefined spatial mapping matrices is selected for transmitting additional data packets to the receiver based on the received channel estimates.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: February 4, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Rohit U Nabar
  • Patent number: 8644130
    Abstract: The present disclosure relates generally to a system and method for use in a communications network. In one example, the method includes dividing a total available frequency band of a first node into a multiple subcarriers using orthogonal frequency division multiplexing (OFDM). A first portion of subcarriers is allocated to a first link coupling the first node with a second node and a second portion of the subcarriers is allocated to a second link coupling the first node to a third node.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: February 4, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Farooq Khan, Joseph R. Cleveland
  • Patent number: 8639284
    Abstract: A system and method providing concurrent multimode communication through multimode signal multiplexing. Various aspects of the present invention may comprise, during a first time period, transmitting a first portion of a first communication in a first communication mode in a serial wireless transmission stream. During a second time period after the first time period, a first portion of a second communication may be transmitted in a second communication mode in the serial wireless transmission stream. Also, during a third time period after the second time period, a second portion of the first communication may be transmitted in the first communication mode in the serial wireless transmission stream. In an exemplary scenario, prior to communicating various communications, transmission time may be allocated between the first and second communication modes. In another exemplary scenario, transmission may be switched between a plurality of communication modes in response to detected communication conditions.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: January 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Arya Behzad
  • Patent number: 8630363
    Abstract: The system (900), transmitter (700), receiver (800.a 800.b), and method of the present invention provide a technique to code data bits into symbols using TCM, MLCM or BIMLCM before the symbols are placed in an SCBT block. Generally, TCM, MLCM, and BIMLCM do not have good performance over the frequency selective channels. However, since the frequency domain equalization of SCBT will flatten the channel, the use of TCM, MLCM and BIMLCM can provide significant gain. Furthermore, since some of the bits are left uncoded, the speed requirements on the encoder and decoder can be relaxed. This feature is especially important for the very high data rate systems.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: January 14, 2014
    Assignee: Koninklike Philips N.V.
    Inventors: Seyed-Alireza Seyedi-Esfahani, Dagnachew Birru
  • Patent number: 8611438
    Abstract: When switching from a digital broadcast to a analog broadcast, a broadcast receiver switches to the analog broadcast after adjusting the reproduced frequency band and the degree of left-right separation of the digital broadcast to be equal to the values of the analog broadcast specified from the receiving state of the analog broadcast respectively, and, when switching from the analog broadcast to the digital broadcast, after adjusting the reproduced frequency band and the degree of left-right separation of the digital broadcast to be equal to the specified values of the analog broadcast respectively and then switching to the digital broadcast, adjusts the reproduced frequency band and the degree of left-right separation of the digital broadcast to be equal to values set for the digital broadcast respectively.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuhiro Nakata
  • Patent number: 8588694
    Abstract: The present invention relates to a method and arrangement in a transmitter unit of a multi-antenna system for an improved calculating of the antenna weights for a beamforming transmission of data from a transmitter unit to a target receiver unit, whereby interfering signal components for receiving units other than the target receiving unit and the desired communication signal at a target receiving unit are weighted by receiver-specific parameters describing the receiver capabilities of said units in terms of their capability for interference suppression and/or signal enhancement. The invention also relates to a method and arrangement for scheduling of user equipments by using said information on the signal processing capabilities for received signals of each receiving unit.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: November 19, 2013
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Bo Goransson, Sven Petersson, Stefan Felter
  • Patent number: 8559877
    Abstract: A radio base station (100) is provided with a stream determination unit (141) for determining whether communication quality of a radio communication channel between the radio base station (100) and a receiving device is lower than a predetermined threshold, and an antenna selector (142) for selecting, from among transmitting antennas (131-134), transmitting antennas such that the distance between the transmitting antennas (131-134) becomes shorter than that before the communication quality is determined to be lower than the predetermined threshold when the communication quality is determined to be lower than the predetermined threshold.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: October 15, 2013
    Assignee: Kyocera Corporation
    Inventors: Yoshimasa Kusano, Taku Nakayama
  • Patent number: 8520748
    Abstract: In a cellular system using an OFDM scheme, a transmitter multiplies subcarriers for channel estimation by codes and transmits them, the codes being such that a phase difference ? of the code multiplied with consecutive subcarriers for channel estimation is constant, and a code of every M consecutive subcarriers (M being 2 or an integer greater than 2) is mutually orthogonal with a code multiplied with same subcarriers of another transmitter.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: August 27, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Hamaguchi, Kimihiko Imamura, Shimpei To, Hideo Namba
  • Patent number: 8503283
    Abstract: Method, apparatus, and computer program product embodiments are disclosed to enable an access point in a wireless network to use Orthogonal Frequency-Division Multiple Access (OFDMA) reserve subcarriers of OFDM symbols for transmitting high priority voice data and video data to particular wireless devices, while the access point allocates the remaining available subcarriers for contention-based access by other wireless devices.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: August 6, 2013
    Assignee: Nokia Corporation
    Inventors: Padam Lal Kafle, Prabodh Varshney, Kyeong Jin Kim
  • Patent number: 8493901
    Abstract: A wireless communication apparatus, which is capable of operating in an active mode and a sleep mode, comprises an antenna control unit, which controls a half-value angle and a directivity angle of an antenna for communication, and a mode control unit, which controls a change between the active mode and the sleep mode. When the wireless communication apparatus is in the sleep mode, the antenna control unit sets the half-value angle of the antenna to be a larger half-value angle than the half-value angle with respect to the active mode, and sets the directivity angle of the antenna to a predetermined angle.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: July 23, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Norihito Aoki
  • Patent number: 8483294
    Abstract: A method and apparatus for transmitting and receiving a common control channel in an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system. In the transmission apparatus, when a plurality of bursts are transmitted during a Transmission Time Interval (TTI) of the common control channel, an Inverse Fast Fourier Transform (IFFT) mapper generates bursts that are shifted in a frequency domain by applying a predetermined cyclic shift offset between the bursts, and maps the generated bursts in a resource block. A transmission unit transmits the bursts to a receiver. In the reception apparatus, a reception unit receives a burst, and a combining unit combines the received burst with a burst stored in a buffer. A decoder decodes each of the combined bursts, and upon a successful decoding, detects a TTI start timing of the common control channel from the successfully decoded burst.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: July 9, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Joon-Young Cho, Ying-Yang Li, Jianzhong Zhang, Ju-Ho Lee, Hwan-Joon Kwon
  • Patent number: 8442443
    Abstract: The present invention relates to a method which analysis the characteristics of the received signal and selects the best beam arrangement for a transmitter/receiver pair for a given situation in a communication system. In particular, the channel delay profile provides characteristics which help to determine and evaluate the quality of a signal link. The result of this evaluation is used for selecting the best beam arrangement.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: May 14, 2013
    Assignee: Sony Corporation
    Inventors: Richard Stirling-Gallacher, Juán Nogueira-Nine
  • Patent number: 8442134
    Abstract: Synchronization tracking in an orthogonal frequency division multiplexing (OFDM) receiver by obtaining a DFT output vector; determining a sample timing offset indication using reference symbols extracted from the DFT output vector; and adapting the OFDM symbol timing using said determined indication. To provide an improved post-DFT algorithm for estimating time tracking error in OFDM receivers the determining includes (a) estimating the channel transfer function at equidistant frequency positions using said reference symbols, for a first OFDM symbol; determining plural frequency correlations for said equidistant frequency positions for said OFDM symbol; (c) repeating steps (a) and (b) for subsequent OFDM symbols; (d) linearly combining said plural frequency correlations for said plural OFDM symbols obtained in steps (a) through (c), for obtaining said sampling clock offset indication wherein the linear combining uses nonzero weights only. An OFDM receiver circuit arrangement performing this method.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: May 14, 2013
    Assignee: NXP B.V.
    Inventor: Andreas Gerhard Bury
  • Patent number: 8422572
    Abstract: In a method and/or an OFDM device for SC-FDMA data transmission, a sequence of input data is transformed by means of a discrete transformation as transformed data signals of coded and modulated data signals on first frequency channels into a first frequency space over a first number of frequencies. The transformed data signals are mapped on second frequency channels in a second frequency space with a larger second number of frequencies. The transformed data signals on the second frequency channels are inverse-transformed using an inverse transformation. Data inversely transformed in such a way are provided for transmission. The transformed data signals are mapped into a frequency range of the second frequency channels in such a way that a constant component of the transformed data signals is mapped centrally within the frequency range.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: April 16, 2013
    Assignees: Nokia Siemens Networks GmbH & Co. KG, Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Andreas Forck, Holger Gaebler, Thomas Haustein, Thomas Hindelang, Volker Jungnickel, Wolfgang Zirwas
  • Patent number: 8364200
    Abstract: A system and method providing concurrent multimode communication through multimode signal multiplexing. Various aspects of the present invention may comprise, during a first time period, transmitting a first portion of a first communication in a first communication mode in a serial wireless transmission stream. During a second time period after the first time period, a first portion of a second communication may be transmitted in a second communication mode in the serial wireless transmission stream. Also, during a third time period after the second time period, a second portion of the first communication may be transmitted in the first communication mode in the serial wireless transmission stream. In an exemplary scenario, prior to communicating various communications, transmission time may be allocated between the first and second communication modes. In another exemplary scenario, transmission may be switched between a plurality of communication modes in response to detected communication conditions.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: January 29, 2013
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Arya Behzad
  • Patent number: 8355455
    Abstract: Channel estimates respectively associated with OFDM pilot symbols are used to estimate additional parameters such as change in channel phase over time, change in channel phase over frequency, and frequency selectivity.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: January 15, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Mohammad M. Mansour, Sundeep Rangan, Siddharth Ray, Vincent Loncke, Pramod K. A. Rao, Joshua L. Koslov
  • Patent number: 8331863
    Abstract: An embodiment for wirelessly communicating a signal includes a transmitter combining a plurality of phase shifted input data signals with a plurality of synchronization/pilot sequences to produce a plurality of combined signals, performing frequency domain-to-time domain transformations of the combined signals to produce a plurality of candidate signals, determining peak-to-average ratios for at least some of the plurality of candidate signals, identifying a selected signal from the plurality of candidate signals based on the peak-to-average ratios, and transmitting the selected signal over a wireless communication channel.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: December 11, 2012
    Assignee: General Dynamics C4 Systems, Inc.
    Inventors: John Eric Kleider, Robert John Baxley
  • Patent number: 8300621
    Abstract: The present invention relates to a method for timing acquisition and carrier frequency offset estimation of an OFDM communication system and an apparatus using the same. For this purpose the present invention provides a method for calculating at least one auto-correlation and calculating an observation value by performing a sliding sum on the at least one auto-correlation, and calculating a peak point of an absolute value of the observation as frame timing. In addition, the present invention provides a method for generating a third OFDM symbol that is generated by delaying a second OFDM symbol, calculating an observation value through the second and third OFDM symbols, and calculating a phase difference from a result of multiplication of the observation value and a conjugate complex value of the observation value such that a carrier frequency offset can be estimated.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: October 30, 2012
    Assignees: Samsung Electronics Co., Ltd, Electronics and Telecommunications Research Institute, KT Corporation, SK Telecom Co., Ltd, Hanaro Telecom, Inc.
    Inventors: Hyoung-Soo Lim, Dong-Seung Kwon
  • Patent number: 8295868
    Abstract: Systems and methods are disclosed that relate to a wireless communication system. Theses systems and methods include providing information from a base station to a mobile device than enables the mobile device to use at least one DCI format. In some embodiments, this information is provided by receiving data over a wireless communication channel. The transmitted data comprises identification information that identifies the format of the transmitted data being transmitted. These systems and methods may also include identifying the format of the transmitted data and processing the transmitted data using the identified format of the transmitted data.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: October 23, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jianzhong Zhang, Farooq Khan
  • Patent number: 8289837
    Abstract: A wideband telecommunications device with narrow band support. The device may be a receiver having a wireless interface configured to receive combined first and second signals, the first signal having data in a first frequency band and the second signal having data in a second frequency band wider than the first frequency band, wherein the first frequency band is within the second frequency band. The receiver may also be a processing system configured to recover the data in the first signal from the combined first and second signals.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: October 16, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Beomsup Kim, Charles J. Persico
  • Patent number: 8213870
    Abstract: Systems and methods for transmitting packets to a receiver. In an implementation, the method includes storing, in a memory, a plurality of predefined spatial mapping matrices for use in a transmission of one or more packets to a receiver; sequentially transmitting one or more packets to the receiver, in which each of the sequential transmissions of one or more packets comprises using a different one of the plurality of predefined spatial mapping matrices stored in the memory; and selecting one of the plurality of predefined spatial mapping matrices stored in the memory for use in a subsequent transmission of one or more packets to the receiver, in which the selection of the one of the plurality of predefined spatial mapping matrices for use in the subsequent transmission is based on a quality of reception of the one or more data packets transmitted in each of the sequential transmissions.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: July 3, 2012
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Rohit U. Nabar
  • Patent number: 8195226
    Abstract: A system and method providing concurrent multimode communication through multimode signal multiplexing. Various aspects of the present invention may comprise, during a first time period, transmitting a first portion of a first communication in a first communication mode in a serial wireless transmission stream. During a second time period after the first time period, a first portion of a second communication may be transmitted in a second communication mode in the serial wireless transmission stream. Also, during a third time period after the second time period, a second portion of the first communication may be transmitted in the first communication mode in the serial wireless transmission stream. In an exemplary scenario, prior to communicating various communications, transmission time may be allocated between the first and second communication modes. In another exemplary scenario, transmission may be switched between a plurality of communication modes in response to detected communication conditions.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: June 5, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Arya Behzad
  • Patent number: 8194796
    Abstract: A media access control (MAC) layer controller can manage base layer data and enhancement layer data in a layered modulation system. The MAC layer controller can process both base layer data and enhancement layer data and map the encoded symbols to a layered modulation constellation when both are present. If data for one of the layers terminates, then the MAC layer controller can generate and supply predetermined stuffing data to the layer lacking additional data. The MAC layer controller can send a control signal to the physical layer hardware to cause the hardware to map the layered signals having the stuffing data to a modified signal constellation. The MAC controller can also generate an overhead message that indicates the occurrence of the stuffing data. The receiver can receive the overhead message and can use the information to configure the receiver for the layered modulation constellation or the modified signal constellation.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: June 5, 2012
    Assignee: Qualcomm Incorporated
    Inventors: Bruce Collins, Rajeev Krishnamurthi, Murali Ramaswamy Chair, Shusheel Gautam, Rajiv Vijayan, Seong Taek Chung
  • Patent number: 8160018
    Abstract: Methods of a slot-level remapping physical uplink control channels into two resource blocks respectively located at two slots of a subframe, are generally adapted to a 3GPP LTE physical uplink where ACK/NAK resource blocks may be applied by the extended cyclic prefix, adapted to a complex 3GPP LTE physical uplink where mixed resource blocks (where the ACK/NAK and CQI channels coexist) may be applied by the normal cyclic prefix, and adapted to a complex 3GPP LTE physical uplink where mixed resource blocks (where the ACK/NAK and CQI channels coexist) may be applied by the extended cyclic prefix.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: April 17, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jianzhong Zhang, Joonyoung Cho
  • Patent number: 8149767
    Abstract: A method of a slot-level remapping physical uplink control channels into two resource blocks respectively located at two slots of a subframe, is generally adapted to a complex 3GPP LTE physical uplink where ACK/NAK recourse blocks may be applied by the extended cyclic prefix, mixed resource blocks (where the ACK/NAK and CQI channels coexist) may be applied by the normal cyclic prefix, or mixed recourse blocks (where the ACK/NAK and CQI channels coexist) may be applied by the extended cyclic prefix.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: April 3, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jianzhong Zhang, Joonyoung Cho