Transmitter Patents (Class 375/135)
  • Patent number: 10277322
    Abstract: Embodiments of the present disclosure may relate to a transmitter to transmit a radio frequency (RF) signal to a receiver via a dielectric waveguide where the transmitter includes a plurality of mixers to generate modulated RF signals and a combiner to combine the modulated RF signals. Embodiments may also include a receiver to receive, from a dielectric waveguide, a RF signal where the receiver includes a splitter to split the RF signal into a plurality of signal paths, a plurality of filters, and a plurality of demodulators. Embodiments may also include a dielectric waveguide communication apparatus that may include the transmitter and the receiver. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: April 30, 2019
    Assignee: Intel Corporation
    Inventors: Georgios C. Dogiamis, Sasha N. Oster, Telesphor Kamgaing, Emanuel Cohen
  • Patent number: 10225841
    Abstract: A distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas. The cellular band outputs of these microcell base station devices are used to modulate a 60 GHz (or higher) carrier wave, yielding a group of subcarriers on the 60 GHz carrier wave. This group will then be transmitted in the air via analog microwave RF unit, after which it can be repeated or radiated to the surrounding area. The repeaters amplify the signal and resend it on the air again toward the next repeater. In places where a microcell is required, the 60 GHz signal is shifted in frequency back to its original frequency (e.g., the 1.9 GHz cellular band) and radiated locally to nearby mobile devices.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: March 5, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Farhad Barzegar, Donald J. Barnickel, Jr., George Blandino, Irwin Gerszberg, Paul Shala Henry, Thomas M. Willis, III
  • Patent number: 10193676
    Abstract: A pilot allocation method for a multi-antenna system and a pilot allocation apparatus are provided. The method comprises: determining the number of pilots to be allocated and the number of training cycles at least according to the number of users in each cell, and determining a pilot allocation scheme of the each cell according to the number of pilots to be allocated and the number of training cycles. The determining a pilot allocation scheme of the each cell can comprise determining pilots allocated for users in the l-th cell used during each training cycle, and during each training cycle, allocating pilots of at least the k-th user of the l-th cell to different users in other cells of the system. By allocating pilots allocated to a desired user to different users during each training cycle, pilot contamination can be randomized during several different continuous training cycles, thereby providing a basis for the later accurate channel estimation.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: January 29, 2019
    Assignee: BEIJING ZHIGU RUI TUO TECH CO., LTD
    Inventors: Zhilin Chen, Chenyang Yang, Weicai Huang
  • Patent number: 10187111
    Abstract: The present disclosure relates to a communication scheme and system which fuse a 5G communication system for supporting a higher data transfer rate than a 4G system with IoT technology, and a system thereof. The present disclosure may be applied to smart services such as smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety services, etc., based on 5G communication technologies and IoT related technologies.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: January 22, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Peng Xue, Nam-Jeong Lee, Cheol Jeong, Hyun-Seok Ryu, Sung Ho Chae
  • Patent number: 10148401
    Abstract: It is possible to provide a radio communication terminal device and a radio transmission method which can improve reception performance of a CQI and a reference signal. A phase table storage unit stores a phase table which correlates the amount of cyclic shift to complex coefficients {w1, w2} to be multiplied on the reference signal. A complex coefficient multiplication unit reads out a complex coefficient corresponding to the amount of cyclic shift indicated by resource allocation information, from the phase table storage unit and multiplies the read-out complex coefficient on the reference signal so as to change the phase relationship between the reference signals in a slot.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 4, 2018
    Assignee: Sun Patent Trust
    Inventors: Tomofumi Takata, Daichi Imamura, Seigo Nakao, Sadaki Futagi, Takashi Iwai, Yoshihiko Ogawa
  • Patent number: 10136435
    Abstract: A method for decoding an orthogonal frequency division multiplex (OFDM) data unit transmitted via an OFDM communication channel is described. A first OFDM symbol of the OFDM data unit is received at a communication device via a first sub-channel of the OFDM communication channel. A candidate OFDM symbol is detected by the communication device on a second sub-channel of the OFDM communication channel. A bandwidth of the OFDM communication channel is detected by the communication device based on the detected candidate OFDM symbol. At least one OFDM symbol of the OFDM data unit is decoded by the communication device based on the detected bandwidth.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: November 20, 2018
    Assignee: Marvell International Ltd.
    Inventors: Xiayu Zheng, Bo Yu, Hongyuan Zhang
  • Patent number: 10123309
    Abstract: An example apparatus for discovery and acquisition of a control channel using guard bands is provided and includes a processor; and a memory in communication with the memory. The processor configured is to determine that a whitespace map is unavailable for communication between a first device and a second device; determine that a guard band is to be used for a control channel between the first device and the second device; send a first message to the second device including an indication to the second device that the second device is use a guard band to maintain communication with the first device; and send a second message to the second device including control channel tuning information associated with the guard band.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: November 6, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Shwetang Sureshkumar Acharya, Raghavendra Kankanhalli Sudheendra, Nalini Sankaranarayanan, Rajaguru Veluchamy, Srinath Gundavelli
  • Patent number: 10070418
    Abstract: The present disclosure includes systems and techniques relating to wireless devices. A described technique includes determining wireless resource allocations (e.g., spatial wireless channel allocations, downlink slot assignments, uplink slot assignments, and frequency sub-band assignments that correspond respectively to frequency sub-bands of a frequency band) in a time domain, a spatial wireless channel domain, and a frequency domain to coordinate communications with wireless devices. The technique further includes generating and transmitting information in one or more frames that directs wireless communications based on the wireless resource allocations.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: September 4, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yong Liu, Raja Banerjea, Hongyuan Zhang, Harish Ramamurthy
  • Patent number: 10044432
    Abstract: Disclosed is a relay method including: receiving, as input, respective reception signals by two receive antennas, the reception signals each including a reception signal resulting from multiplexing respective transmission signals transmitted by two transmission antennas in a first frequency band; performing frequency conversion on the reception signal received by one of the receive antennas so as to obtain a signal of a third frequency band; and performing frequency multiplexing on the signal having the third frequency band and the reception signal received by the other of the receive antennas.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: August 7, 2018
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10009158
    Abstract: Provided are resource mapping and receiving methods and devices and signalling notification and acquisition methods and devices. The resource mapping method includes that: an evolved NodeB (eNB) maps a Channel State Information Reference Signal (CSI-RS) onto multiple resource elements in a manner of frequency division multiplexing and/or time division multiplexing and/or code division multiplexing; and/or the eNB maps an Interference Measure Resource (IMR) onto multiple resource elements in a manner of frequency division multiplexing and/or time division multiplexing. By the technical solution, the effects of improving measurement performance of a system, ensuring more accurate adaptive transmission and improving spectral efficiency of the system are further achieved.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: June 26, 2018
    Assignee: ZTE CORPORATION
    Inventors: Senbao Guo, Yunfeng Sun, Bo Dai, Junfeng Zhang
  • Patent number: 9985701
    Abstract: Techniques are disclosed relating to signaling and frame structure for massive MIMO communication systems. In some embodiments, an apparatus is configured to receive an uplink pilot symbol from a mobile device over a first channel and receive uplink data from the mobile device over the first channel, where the uplink data is included in one or more orthogonal frequency division multiplexing (OFDM) symbols at a symbol rate. In these embodiments, the apparatus is configured to, determine channel information based on the pilot symbol, precode downlink data based on the channel information, and transmit the precoded downlink data to the mobile device. In these embodiments, a transition interval between receiving the uplink pilot symbol and beginning to transmit the precoded downlink data corresponds to less than five OFDM symbols at the symbol rate. This may facilitate reciprocity-based precoding for fast-moving mobile devices, in some embodiments.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: May 29, 2018
    Assignee: NATIONAL INSTRUMENTS CORPORATION
    Inventors: Ian C. Wong, Karl F. Nieman, Nikhil U. Kundargi
  • Patent number: 9960849
    Abstract: Embodiments of the present disclosure may relate to a transmitter to transmit a radio frequency (RF) signal to a receiver via a dielectric waveguide where the transmitter includes a plurality of mixers to generate modulated RF signals and a combiner to combine the modulated RF signals. Embodiments may also include a receiver to receive, from a dielectric waveguide, a RF signal where the receiver includes a splitter to split the RF signal into a plurality of signal paths, a plurality of filters, and a plurality of demodulators. Embodiments may also include a dielectric waveguide communication apparatus that may include the transmitter and the receiver. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: May 1, 2018
    Assignee: Intel Corporation
    Inventors: Georgios C. Dogiamis, Sasha N. Oster, Telesphor Kamgaing, Emanuel Cohen
  • Patent number: 9875646
    Abstract: An approach for supervision of an audio path within an audio system that conserves power while operating in battery mode by temporarily turning off pre-determined audio components of the audio system when not performing supervision tasks and no audio is present on the audio path.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: January 23, 2018
    Assignee: Siemens Schweiz AG
    Inventors: Harald Schermann, Leonid Ayzenshtat
  • Patent number: 9793964
    Abstract: Some demonstrative embodiments include apparatus, system and method of communicating a Multiple-Input-Multiple-Output (MIMO) transmission with Golay Sequence Set (GSS). For example, an apparatus may include logic and circuitry configured to cause a wireless station to generate a Golay Sequence Set (GSS) including a plurality of complementary Golay sequence pairs based on a plurality of weight vectors, the plurality of weight vectors including one or more weight vectors corresponding to one or more respective stream numbers, which are equal to or greater than 9; and transmit a Multiple-Input-Multiple-Output (MIMO) transmission over a plurality of spatial streams, the MIMO transmission including at least one field transmitted over a spatial stream having a stream number equal to or greater than 9, the field is based on a complementary Golay sequence pair of the plurality of complementary Golay sequence pairs, which is based on a weight vector corresponding to the stream number.
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: October 17, 2017
    Assignee: INTEL CORPORATION
    Inventors: Artyom Lomayev, Iaroslav P. Gagiev, Alexander Maltsev, Michael Genossar, Carlos Cordeiro
  • Patent number: 9781706
    Abstract: A wireless transmit/receive unit includes at least one processor that receives a high speed physical downlink shared channel, and in response, transmits at least one random access channel preamble followed by ACK/NACK and channel quality indicator (CQI) information. The at least one random access channel preamble is selected from a set of random access preambles reserved for the ACK/NACK and CQI information.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: October 3, 2017
    Assignee: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Guodong Zhang, Christopher R. Cave, Guang Lu, Paul Marinier, Arty Chandra, Sudheer A. Grandhi
  • Patent number: 9717094
    Abstract: A method includes scheduling at least one resource for a Device-to-Device (D2D) transmission control channel (DCCH) carrying a D2D control information (D2DCI) message, transmitting, by a first UE, the DCCH on the at least one DCCH resource to at least one second UE, scheduling at least one resource for a D2D data channel (DDCH), and transmitting, by the first UE, the DDCH on the at least one DDCH resource to the at least one second UE. A UE includes one or multiple antenna, and a processing circuitry configured to schedule at least one resource for a DCCH, transmit the DCCH on the at least one DCCH resource, to at least one second UE through the one or more multiple antenna, schedule at least one resource for a DDCH, and transmit the DDCH on the at least one DDCH resource, to the at least one second UE.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: July 25, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Thomas David Novlan, Young-Han Nam, Boon Loong Ng
  • Patent number: 9654312
    Abstract: The present invention relates to a frequency region equalization method and an apparatus therefor in a cellular environment on the basis of a QAM-FBMC system. A method for receiving a signal by a receiver according to one embodiment of the present invention may include: performing channel estimation; comparing a minimum channel gain with a predetermined first threshold value; and performing layered detection when the minimum channel gain is smaller than the first threshold value. According to one embodiment of the present invention, a gain can be acquired in terms of a BER even while a structure of a symbol level equalizer is maintained.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: May 16, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dongkyu Sim, Chungyong Lee, Taeyoung Kim
  • Patent number: 9609633
    Abstract: The present invention relates to a data transmitting method using a bandwidth request channel and a user terminal and a base station conducting the same. The present invention provides a communication method by a user terminal which transmits data to a base station via a bandwidth request channel, including: generating a preamble for bandwidth request; determining whether a message for the bandwidth request is generated; generating a first signal value to be operated with the preamble when it is determined that the message is generated and generating a second signal value to be operated with the preamble when it is determined that the message is not generated; operating the preamble with the generated first signal value or second signal value; and transmitting a signal including the operated preamble to the base station, thereby reducing overhead occurring when the bandwidth request information is demodulated.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: March 28, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyeong Sook Park, Jun Woo Kim, Youn Ok Park
  • Patent number: 9531390
    Abstract: An integrated circuit includes first and second data channel circuits and first and second inductor-capacitor (LC) tank oscillator circuits. The first data channel circuit generates a first data signal in response to a first clock signal. The second data channel circuit generates a second data signal in response to a second clock signal. The frequencies of the first and second clock signals are substantially the same. The first LC tank oscillator circuit generates a first periodic signal. The first clock signal is generated in response to the first periodic signal. The second LC tank oscillator circuit generates a second periodic signal. The second clock signal is generated in response to the second periodic signal. The first and second LC tank oscillator circuits generate non-overlapping frequency ranges for the first and second periodic signals.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: December 27, 2016
    Assignee: Altera Corporation
    Inventors: Dong-Myung Choi, David Mendel
  • Patent number: 9525515
    Abstract: A broadcast signal receiver is disclosed. A broadcast signal receiver according to an embodiment of the present invention comprises a constellation mapper for symbol-demapping by using the signaling information as LLR values; a bit deinterleaver for bit multiplexing and block deinterleaving of the signaling information; an FEC decoder for FEC decoding the signaling information; and a descrambler for descrambling the signaling information.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: December 20, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Jongwoong Shin, Jinwoo Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 9525759
    Abstract: In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, wherein the first format includes a short training field (STF) spread with a first spread code, a physical layer (PHY) data unit that conforms to a second format and is for transmitting PHY control information is generated. Generating the PHY data unit includes generating a first portion of the PHY data unit to indicate the PHY data unit conforms to the second format, wherein the first portion of the PHY data unit includes an STF spread with a second spread code different than the first spread code. A second portion of the PHY data unit is generated according to the second format, wherein the second portion of the PHY data unit omits header fields specified by the first format.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: December 20, 2016
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Songping Wu, Hui-Ling Lou, Rohit U. Nabar
  • Patent number: 9331762
    Abstract: A wireless communication system is disclosed. The wireless communication system performs data transmission using spatially multiplexed streams from a first terminal including N antennas to a second terminal including M antennas (N and M are integers larger than or equal to 2 and N>M).
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: May 3, 2016
    Assignee: Sony Corporation
    Inventor: Tomoya Yamaura
  • Patent number: 9329914
    Abstract: A method for all-to-all message exchange between program tasks including N>1 hierarchy levels ln, n=1 to N, in which a first level l1 includes a plurality of group tasks and each higher level l(n>1) includes at least one group of level l(n?1) groups to which that task belongs in respective hierarchy levels of the network topology; sending a message via the interconnection network to a respective destination task whose hierarchical identifier is determined; and using the hierarchical identifier to send the program task and the network topology, such that the resulting exchange pattern for the all-to-all message exchange exploits a hierarchical distance in the network topology in a desired manner.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: May 3, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Cyriel J Minkenberg, Bogdan Prisacari, German Rodriguez Herrera
  • Patent number: 9325062
    Abstract: A communication system is provided, including an antenna, a matching network coupled to the antenna, a controller configured to host an algorithm for controlling the matching network, and a look-up table coupled to the controller. The look-up table includes characterization data according to frequency bands and conditions. The controller is configured to refer to the look-up table to determine optimum impedance for a frequency band selected under a condition detected during a time interval, and adjust the matching network to provide the optimum impedance. Part or all of the sections related to the tunable matching scheme can be integrated on a chip.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: April 26, 2016
    Assignee: ETHERTRONICS, INC.
    Inventors: Olivier Pajona, Laurent Desclos
  • Patent number: 9325370
    Abstract: A method of emission of a frequency synchronization signal comprises a first step of determining at least two first emission frequencies respectively associated with at least two first intervals separated temporally by a first duration. The first temporal intervals are of identical duration. The first durations are identical for identical first frequencies and the first durations are different for different first frequencies. The method also comprises a second step of emitting at least one synchronization signal in the first temporal intervals and by using the first frequency, the signal emitted in the first intervals being identical.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: April 26, 2016
    Assignee: Thales
    Inventors: Marc Touret, Thierry Menigand, Marc Coutolleau
  • Patent number: 9191170
    Abstract: In the present invention, disclosed are a method for transceiving a reference signal in a wireless access system supporting device-to-device communication, and apparatus for same. More particularly, comprised are the steps of: a first device transmitting the reference signal for aligning device-to-device synchronization with a second device; and the first device performing device-to-device communication with the second device performing device-to-device synchronization with the second device after obtaining synchronization with the second device, wherein the reference signal is mapped on a predetermined symbol inside a resource that is allocated for device-to-device communication with the second device.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: November 17, 2015
    Assignee: LG Electronics Inc.
    Inventors: Jiwoong Jang, Hyunsoo Ko, Hangyu Cho
  • Patent number: 9137810
    Abstract: The disclosure is related to transmitting configuration information of interference measurement resources (IMRs) and measuring interference in a downlink CoMP environment.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: September 15, 2015
    Assignee: KT CORPORATION
    Inventor: Seung Hyun Kang
  • Patent number: 9055534
    Abstract: Disclosed is a method for determining transmission power for transmitting uplink signals between terminals in a wireless communication system that supports terminal-to-terminal communication, and an apparatus therefor. A method in which a first terminal determines transmission power for transmitting an uplink signal to a second terminal in a wireless communication system that supports terminal-to-terminal communication comprises the following steps: estimating a channel state based on a second terminal-specific signal received from the second terminal; transmitting the estimated channel information to a base station; receiving a message, including information on a transmission power control factor, from the base station or from the second terminal; and determining transmission power for transmitting an uplink signal to the second terminal based on the received message.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: June 9, 2015
    Assignee: LG Electronics Inc.
    Inventors: Dongcheol Kim, Hangyu Cho, Kyujin Park, Jiwoong Jang
  • Publication number: 20150139047
    Abstract: An entire radio transceiver can be easily integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Application
    Filed: December 22, 2014
    Publication date: May 21, 2015
    Inventors: Karl Håkan Torbjörn GÄRDENFORS, Sven MATTISSON, Jacobus Cornelis HAARTSEN
  • Patent number: 9036684
    Abstract: Compressive sampling is used to generate pilot symbols to be transmitted over an array of antennas in a MIMO wireless communications device. A pilot symbol is transmitted over the array of antennas according to a spatially randomized antenna transmission function that randomly changes across the array of antennas. The randomized antenna transmission function may randomly select/deselect antennas and/or randomly change amplitude and/or phase of the pilot symbol transmission. Channel estimates can be constructed at a receiver based on the spatially randomized pilot symbols that were transmitted.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: May 19, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Dennis Hui, Kumar Balachandran, Jung-Fu Cheng, Jiann-Ching Guey
  • Publication number: 20150131703
    Abstract: A method and apparatus for processing a signal is present. Information is carried in a frequency hopping signal. The frequency hopping signal is sent to a gateway in a communications network through a satellite. The frequency hopping signal is unprocessed by the satellite to identify the information in the frequency hopping signal.
    Type: Application
    Filed: February 8, 2013
    Publication date: May 14, 2015
    Applicant: The Boeing Company
    Inventor: The Boeing Company
  • Patent number: 9020056
    Abstract: Method for transmitting and receiving signals over at least one channel between at least one transmitter and at least one receiver, the channel comprising at least one group of sub-channels, the group comprising at least one sub-channel, including the procedures of estimating at least one line characteristic of the channel and selecting a transmission scheme for each group of the at least one group of sub-channels according to the estimated line characteristic, wherein the transmission scheme is selected between a single spatial stream transmission scheme and a multiple spatial stream transmission scheme.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 28, 2015
    Assignee: SIGMA Designs Israel S.D.I. Ltd.
    Inventors: Ilan Reuven, Rami Verbin
  • Patent number: 9020008
    Abstract: In one embodiment, each device in a frequency hopping communication network independently determines its own local unicast listening schedule, and discovers a neighbor unicast listening schedule for each of its neighbors. The devices also synchronize to a common broadcast schedule for the network that simultaneously overlays a configured portion of all unicast listening schedules in the network. Accordingly, the device operate in a receive mode according to their local unicast listening schedule and the common broadcast schedule during the overlaid configured portion, and in a transmit mode according to each neighbor unicast listening schedule and the common broadcast schedule during the overlaid configured portion depending upon a destination of transmitted traffic.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: April 28, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Wei Hong, Lik Chuen Alec Woo
  • Patent number: 9014233
    Abstract: A method includes generating multiple copies of a signal that comprises a plurality of time division multiple access frames. The multiple copies of the signal includes a first copy and one or more other copies of the signal. Each of the one or more other copies of the signal having a respective fixed delay and a respective phase relative to the first copy of the signal. The method also includes transmitting the multiple copies of the signal using hopping carrier frequencies. The hopping carrier frequencies associated with a consecutive pair of the plurality of time division multiple access frames are separated by an odd multiple of a separation value representing a frequency separation between two adjacent carrier signals. The respective fixed delay is proportional to the separation value for each of the one or more other copies of the signal.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: April 21, 2015
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Arunabha Ghosh
  • Patent number: 9014234
    Abstract: A communication system comprises: a communication apparatus that is configured to transmit communication data, which includes a plurality of known synchronization symbols subjected to spread modulation with a spread code; and a communication apparatus that is configured to perform, when receiving the communication data, processing for detecting a synchronization timing, based on a correlation value between the received communication data and a reference signal. The communication apparatus comprises: a disturbing wave detection part configured to detect a period of a disturbing wave; a communication control part configured to set a transmission period of the synchronization symbol to be integer multiple of the period of the disturbing wave; and a transmission unit configured to transmit the communication data in which the transmission period of the synchronization symbol has been set by the communication control part.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: April 21, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Teruhito Takeda, Mitsuru Tanabe
  • Publication number: 20150103870
    Abstract: A synchronization signal transmitting apparatus generates a plurality of different primary synchronization signals that are transmitted in an ultra frame unit within one super ultra frame and generates one secondary synchronization signal that is transmitted in a frame unit within one super ultra frame.
    Type: Application
    Filed: October 14, 2014
    Publication date: April 16, 2015
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyung Jin KIM, Seokki KIM, Soojung JUNG, Seungkwon CHO, Sung Cheol CHANG, DongSeung KWON
  • Patent number: 9008150
    Abstract: An interference signal avoiding device of a frequency hopping spread system and a method thereof are disclosed. A method of transmitting/receiving an interference signal avoiding signal according to the present invention includes: determining a frequency hopping channel set and a parameter of an interference signal detector in consideration of characteristics of an interference signal; detecting whether there is an interference signal with respect to frequency hopping candidate channels that are to be used for the next frequency hopping by using the determined interference signal detector; transmitting a signal through a channel that is determined by the interference signal detector that there is no interference signal among the frequency hopping candidate channels; and searching a channel through which the signal is transmitted from the frequency hopping candidate channels in order to receive the transmitted signal.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: April 14, 2015
    Assignee: SNU R&DB Foundation
    Inventors: Yong-Hwan Lee, Seung-Hwan Lee, Jin-Seok Han
  • Patent number: 9008151
    Abstract: Provided is a transmission method that converts an encoded block of data into first complex symbols each including a real component and an imaginary component, one or which is designated as a first component and the other as a second component; writes the first components and the second components of the first complex symbols respectively column by column into a first interleaver matrix and a second interleaver matrix having NR rows; applies a cyclic shift to each column of the second interleaver matrix in accordance with a predetermined shift pattern; and reads the first components from the first interleaver matrix and the second components from the cyclically shifted second interleaver matrix row by row. NR is a multiple of NRF greater than NRF (NRF being an integer greater than one), and the shift pattern for the cyclic shift includes only integers that are not a multiple of NRF.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: April 14, 2015
    Assignee: Panasonic Corporation
    Inventor: Mihail Petrov
  • Patent number: 8994567
    Abstract: A digital-to-analog conversion circuit operates by selectively discharging members of a plurality of capacitors. Charging of the capacitors occurs during a reset period while digital-to-analog conversion occurs as the capacitors are discharged. Those capacitors that are discharged are selected from the plurality of capacitors based on a digital input. The analog output includes the charge discharged from the capacitors. The capacitors are optionally divided into separate capacitor banks.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: March 31, 2015
    Assignee: Broadcom Europe Limited
    Inventors: Jonathan Ephraim David Hurwitz, Steven Collins
  • Patent number: 8989233
    Abstract: Methods and apparatuses are provided for transmitting and receiving data in a wireless communication system. Hopping information including at least a number of sub-bands is received. Resource allocation information is received. A resource for transmitting the data is determined based on the resource allocation information and the hopping information. The data is transmitted using the determined resource. The resource for transmitting the data is determined according to at least one of applying a change of a resource allocation within inter sub-bands and applying a change of the resource allocation within an intra sub-band. A sub-band includes at least one sub-channel, and one sub-channel includes a plurality of sub-carriers.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: March 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-Chon Yu, Hwan-Joon Kwon, Dong-Hee Kim, Yeon-Ju Lim
  • Patent number: 8982925
    Abstract: A communications node operable to communicate with another communications node over a communications channel having a plurality of frequency resources, the communications node includes data defining a division of the communications channel into a plurality of contiguous sub-bands each having N frequency resources, wherein each frequency resource in a sub-band has a corresponding frequency resource in each of the other sub-bands, data defining an initial allocation of the frequency resources, a resource determination module operable to apply a frequency shift to the initially allocated frequency resources in accordance with a frequency hopping sequence to determine frequency resources to use for communicating information with the other communications node, wherein the frequency shift applied moves the initially allocated frequency resources to corresponding frequency resources in another sub-band, a transceiver for communicating information with the other communications node using the determined frequency reso
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: March 17, 2015
    Assignee: NEC Corporation
    Inventors: Robert Arnott, Yassin Aden Awad
  • Patent number: 8982998
    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: March 3, 2014
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8976836
    Abstract: A sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal using the multiple antenna technique is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. Moreover, the sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. The sounding reference signal is transmitted through an antenna pattern in which the sounding reference signal can be transmitted through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead in this environment.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: March 10, 2015
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Sang Min Ro, Joon Young Cho, Ju Ho Lee, Yingyang Li, Jin Kyu Han
  • Patent number: 8976837
    Abstract: A system and method for generating a low probability of detection (LPD) waveform is presented. The method modulates pre-modulated symbols using pulse-position modulation (PPM) to produce PPM modulated signals with a modulated in-phase (I) component and a modulated quadrature (Q) component. Next, frequency hopping is used to transmit the modulated I component at a randomized start time within a time slot and to transmit the modulated Q component at the randomized start time within the same slot. The modulated Q component does not overlap with the modulated I component. The method can also overlay transmission security (TRANSEC) pseudorandom (PN) overlay on the modulated Q component and the modulated I component before the modulated Q component and the modulated I component are transmitted.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: March 10, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Gary R. Lomp, John F. Courtien, David A. Haessig, Jr.
  • Patent number: 8976842
    Abstract: A method of detecting PN code synchronization for a DSSS signal comprising receiving a DSSS data signal of data frames comprised of I and Q symbols, at least a portion of each data frame comprising a unique word, demodulating the data signal into I and Q chip samples, filtering the I and Q chip samples and outputting the filtered I and Q chip samples to a chip stream controller which outputs the plurality of chip streams to a correlation matrix that correlates the plurality of chip streams with the chipped unique word and outputs a correlated data stream. A plurality of FFTs is run on the correlated output data stream and a processor searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power among the plurality of FFT rounds and determines whether PN synchronization is present.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: March 10, 2015
    Assignee: Comtech EF Data Corp.
    Inventor: Lianfeng Peng
  • Patent number: 8970345
    Abstract: An improved barrier door one way wireless communication system for operating a barrier, such as a garage door, includes the transmission and reception of multibit code hopping data packets in combination with automatic RF channel switching. Packet data is transmitted automatically on more than one RF channels in a switching style while sending two or more redundant multibit code hopping data packets on each of the RF channels. The system also provides for the learning of a transmitter to a receiver where two or more code hopping data packets must be received and decoded by the receiver on all RF channels before a transmitter can be learned to a receiver. Once the transmitter is learned, actuation of the transmitter during a learn mode can open a window for learning of a single channel transmitter.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: March 3, 2015
    Assignee: Overhead Door Corporation
    Inventors: Grant B. Carlson, Brett A. Reed
  • Patent number: 8971382
    Abstract: A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: March 3, 2015
    Assignee: Fujitsu Limited
    Inventors: Yi Wang, Yuantao Zhang, Hua Zhou, Jianming Wu
  • Patent number: 8971377
    Abstract: A communications node includes data defining a division of a communications channel into a plurality of contiguous sub-bands each having N frequency resources, data defining an initial allocation of the frequency resources, a resource determination module operable to apply a frequency shift to the initially allocated frequency resources in accordance with a frequency hopping sequence to determine frequency resources to use for communicating information according to the following: y={x+a(t)N} mod NRB where NRB is the total number of frequency resources in the transmission band; N is the number of contiguous frequency resources in each sub-band; x is the initially allocated frequency resource; y is the frequency hopped resource; t is a time counter; a(t) is the frequency hopping shift applied at time point t, and is an integer value from the set {0, 1, . . . , S?1}; and S is the number of sub-bands; and a transceiver.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: March 3, 2015
    Assignee: NEC Corporation
    Inventors: Robert Arnott, Yassin Aden Awad
  • Patent number: 8964811
    Abstract: A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: February 24, 2015
    Assignee: Comtech EF Data Corp.
    Inventors: Michael Beeler, Cris M. Mamaril, Jeffery Harig
  • Publication number: 20150043618
    Abstract: A method for communication includes transmitting a first uplink message from a first remote node (200, 300, 400) to a central node (100) in a wireless communication system according to a first frequency hopping scheme, and transmitting a second uplink message from a second remote node to the central node in the wireless communication system according to a second frequency hopping scheme, different from the first scheme. Both the first and the second uplink messages are received and processed at the central node.
    Type: Application
    Filed: October 31, 2014
    Publication date: February 12, 2015
    Inventors: Mordechai Mushkin, Shimon Zigdon, Miri Ratner, David Harif