Plural Feedback Loops Patents (Class 375/252)
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Patent number: 12166593Abstract: Methods, apparatus and systems for wirelessly transmitting a data flow based on a plurality of automatic repeat request (ARQ) processes are disclosed. In one embodiment, a transmitter module in a wireless communication system is configured for corresponding a data flow to a list of automatic repeat request (ARQ) processes that are associated with a same logical channel, and transmitting data of the data flow based on the list of ARQ processes.Type: GrantFiled: August 13, 2021Date of Patent: December 10, 2024Assignee: ZTE CorporationInventors: Feng Xie, Liping Wang, Jun Xiong
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Patent number: 12088313Abstract: Systems and methods are provided for implementing an analog-to-digital converter. In some embodiments, the analog-to-digital converter comprises a first-stage quantizer, a second-stage quantizer, and a noise cancellation filter. The first-stage quantizer is configured to receive an analog input signal and generate a first-stage digital output signal based on the analog input signal and a residual signal based on the first-stage digital output signal and the analog input signal. The second-stage quantizer is configured to receive the residual signal, to determine a first-stage quantization error based on the residual signal, to digitize the first-stage quantization error, and to generate a second-stage digital output signal based on the first-stage quantization error.Type: GrantFiled: June 23, 2022Date of Patent: September 10, 2024Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventor: Martin Kinyua
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Patent number: 12021788Abstract: A method of operating a time division duplex (TDD) wireless communication system is disclosed. The method includes establishing communications with a remote transceiver. A subframe configuration including static and flexible subframes is determined and transmitted to the remote transceiver. A channel state information (CSI) report is received from the remote transceiver in response to the subframe configuration.Type: GrantFiled: February 15, 2021Date of Patent: June 25, 2024Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Runhua Chen, Anthony Edet Ekpenyong
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Patent number: 12015426Abstract: A delta-sigma modulator including force circuitry that receives an output digital signal and provides a forced digital signal with a predetermined force state based on a force control signal, a combiner that subtracts the forced digital signal from the output digital signal for providing a digital error signal, and force correction circuitry that converts the digital error signal into one or more analog error correction signals applied to corresponding inputs of loop filter circuitry. The digital error signal and the force control signal may each be used to develop corresponding analog feedback signals used to adjust an analog input signal. The digital error signal may also be converted to one or more correction signals applied to corresponding inputs of the loop filter circuitry to correct the output digital signal. The digital error signal may also be used by a digital noise cancellation filter to further correct the output digital signal.Type: GrantFiled: August 4, 2022Date of Patent: June 18, 2024Assignee: NXP B.V.Inventors: Lucien Johannes Breems, Muhammed Bolatkale
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Patent number: 12003293Abstract: A system includes a control apparatus and a plurality of access points (APs), with the control apparatus causing the access point apparatus to identify a received signal strength at a station (STA) of signals transmitted from the plurality of Aps, and determine communication parameters for the plurality of APs to communicate with the STA by using joint beamforming (JB). After the received signal strength at the STA of a signal transmitted from a first AP and the received signal strength at the STA of a signal transmitted from a second AP are identified, whether to use JB for communication between the first AP and the second AP and the STA is determined based on a strength difference between the two received signal strengths.Type: GrantFiled: December 1, 2021Date of Patent: June 4, 2024Assignee: CANON KABUSHIKI KAISHAInventor: Eigoro Ina
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Patent number: 11889426Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a first sensing signal of a radio frequency (RF) sensing procedure at a first transmit power. The UE may receive, from a base station at least in part in response to the first sensing signal, a power control message for sensing signals of the RF sensing procedure. The power control message may indicate a power control strategy for transmitting sensing signals of the RF sensing procedure. The UE may then transmit, at a second transmit power based on the received power control message, a second sensing signal of the RF sensing procedure.Type: GrantFiled: June 14, 2021Date of Patent: January 30, 2024Assignee: QUALCOMM IncorporatedInventors: Marwen Zorgui, Srinivas Yerramalli, Wooseok Nam, Yucheng Dai, Tao Luo, Junyi Li, Peter Gaal, Sony Akkarakaran, Rajat Prakash, Roohollah Amiri
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Patent number: 11616533Abstract: A radio power transmission system and a radio power transmission method are provided. The radio power transmission system includes a first radio device and a second radio device including a control signal generator and an antenna. The control signal generator generates a control signal for synchronizing frequencies and phases of power waves, based on signals indicating reception intensities of the power waves in a receiving device receiving the power waves. The antenna transmits the control signal to a plurality of the first radio devices. In the radio power transmission system, the plurality of first radio devices radiate, toward the receiving device, the power waves having the frequencies and phases set to a predetermined value based on the control signal.Type: GrantFiled: July 26, 2021Date of Patent: March 28, 2023Assignee: PANASONIC HOLDINGS CORPORATIONInventors: Shoichi Kajiwara, Hiroyuki Tani, Takuma Ikeda, Yuki Tanaka
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Patent number: 11582626Abstract: Provided are a method and apparatus for supporting beam-based cooperative communication for smoothly providing a service in a wireless communication system. The method, performed by a terminal, of supporting beam-based cooperative communication includes: receiving, from a base station, configuration information for measuring quality of a beam; receiving first reference signals regarding desired channels respectively corresponding to a plurality of transmission beams received from the base station, and second reference signals regarding interference channels respectively corresponding to a plurality of transmission beams that interfere with the plurality of transmission beams received from the base station; and measuring quality of a beam regarding the plurality of transmission beams received from the base station, based on the configuration information, the first reference signals, and the second reference signals.Type: GrantFiled: October 17, 2018Date of Patent: February 14, 2023Inventors: Young-woo Kwak, Hoon-dong Noh, Cheol-kyu Shin
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Patent number: 11509327Abstract: Systems and methods for a power-efficient 3-level digital-to-analog converter. A converter cell using a current starving technique keeps a portion of the converter cell turned on in a low power mode, as opposed to completely turning off current in selected modes. A conversion system keeps a first set of converters active while allowing a second set of converters to be powered down. Systems and methods presented save power and allow for efficient reactivation of converters.Type: GrantFiled: August 6, 2021Date of Patent: November 22, 2022Assignee: Analog Devices, Inc.Inventors: Preston S. Birdsong, Abhishek Bandyopadhyay, Adam R. Spirer
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Patent number: 11303413Abstract: A radio communication method for a user terminal performing communication in a cell where DL transmission and UL transmission vary in a time direction is provided. The radio communication method includes receiving downlink control information transmitted in a specific subframe; and analyzing a number and/or positions of subframes to be allocated for the DL transmission among subframes constituting a radio frame based on DL assignment in the downlink control information.Type: GrantFiled: August 18, 2017Date of Patent: April 12, 2022Assignee: NTT DOCOMO, INC.Inventors: Satoshi Nagata, Yoshihisa Kishiyama
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Patent number: 11211981Abstract: A control apparatus operable to control a plurality of access points (APs) configured to be able to use joint beamforming (JB) includes a memory containing instructions, and at least one processor for executing the instructions. The executed instructions cause the control apparatus to obtain, from a station (STA) which is a communication partner, reception information on a received signal strength at the STA of signals transmitted from the plurality of Aps, and determine, based on the reception information, a communication parameter related to JB for communication with the STA. It is determined to use JB for communication with the STA in a case where there is one or more other received signal strengths for which a strength difference from a largest received signal strength among a plurality of received signal strengths of the plurality of APs included in the reception information is within a predetermined range.Type: GrantFiled: March 25, 2020Date of Patent: December 28, 2021Assignee: CANON KABUSHIKI KAISHAInventor: Eigoro Ina
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Patent number: 11153853Abstract: Apparatuses, methods, and systems are disclosed for sidelink control information indication. One apparatus includes a receiver that receives a second control information message from a remote unit over sidelink communication. Here, the second control information message is in response to the remote unit receiving one or more data processes scheduled by a first control information message from a relay unit. The apparatus also includes a processor that determines a transmission-reception pattern for the sidelink communication and generates an indicator of the determined transmission-reception pattern. The apparatus further includes a transmitter that transmits the indicator of the determined transmission-reception pattern to the remote unit in a third control information message.Type: GrantFiled: May 5, 2017Date of Patent: October 19, 2021Assignee: Motorola Mobility LLCInventors: Xiaodong Yu, Haipeng Lei, Chenxi Zhu, Zhi Yan, Hongchao Li
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Patent number: 10924249Abstract: A method of operating a time division duplex (TDD) wireless communication system is disclosed. The method includes establishing communications with a remote transceiver. A subframe configuration including static and flexible subframes is determined and transmitted to the remote transceiver. A channel state information (CSI) report is received from the remote transceiver in response to the subframe configuration.Type: GrantFiled: November 10, 2017Date of Patent: February 16, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Runhua Chen, Anthony Edet Ekpenyong
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Patent number: 10623135Abstract: Apparatuses, methods, and systems are disclosed for flexible uplink/downlink transmissions. One apparatus includes a processor and a memory that stores code executable by the processor. The code, in various embodiments, includes code that determines a frame period length for communication with a user equipment. In a further embodiment, the code includes code that determines an uplink/downlink split pattern to use with the determined frame period length. In certain embodiments, the code includes code that forms at least one message indicating the frame period length and the uplink/downlink split pattern. The apparatus may include a transmitter that provides the at least one message to the user equipment.Type: GrantFiled: August 14, 2015Date of Patent: April 14, 2020Assignee: Lenovo Innovations Limited (Hong Kong)Inventor: Haipeng Lei
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Patent number: 10375746Abstract: The present invention relates to a method and an apparatus for D2D signal transmission of a first terminal in a wireless communication system. Specifically, the method comprises the steps of: receiving a resource pool configuration indicating a D2D resource pool; and transmitting a D2D data channel on the basis of a D2D slot number which is re-indexed within the D2D resource pool.Type: GrantFiled: July 7, 2015Date of Patent: August 6, 2019Assignee: LG ELECTRONICS INC.Inventors: Youngtae Kim, Hanbyul Seo, Inkwon Seo, Hyukjin Chae, Seungmin Lee
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Patent number: 10263825Abstract: The present invention relates to a method of detecting a synchronization signal for D2D (device to device) communication of a terminal in a wireless communication system. More particularly, the method includes detecting a first synchronization signal and a second synchronization signal on a specific sub-frame for a synchronization signal period set for D2D communication, wherein the first synchronization signal is generated based on a first of predefined sets of root indexes, the second synchronization signal is generated based on a second of predefined sets of root indexes, and the first set of root indexes and the second set of root indexes are made up of different indexes.Type: GrantFiled: September 16, 2014Date of Patent: April 16, 2019Assignee: LG ELECTRONICS INC.Inventors: Daewon Seo, Hanbyul Seo, Hakseong Kim
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Patent number: 10080232Abstract: The present invention relates to a method and a device for transmitting, by a first terminal, a device-to-device (D2D) signal in a wireless communication system. Particularly, the method comprises the steps of: performing D2D transmission scheduling for a device-to-device synchronization signal (D2DSS) and a device-to-device channel (D2DCH); and transmitting a D2D signal on a first D2D subframe among a plurality of D2D subframes, wherein the first D2D subframe is a D2D subframe in which a D2D synchronization signal transmission for the first terminal is configured among D2D subframes configured to enable a D2D synchronization signal transmission, and the D2D signal drops the D2DCH when the D2DSS and the D2DCH are simultaneously scheduled on the first D2D subframe.Type: GrantFiled: May 18, 2015Date of Patent: September 18, 2018Assignee: LG ELECTRONICS INC.Inventors: Seungmin Lee, Hanbyul Seo, Jihyun Lee, Hakseong Kim, Hyukjin Chae
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Patent number: 10064176Abstract: The disclosure is related to a method and used in a user equipment that supports Device to Device transmission in Time Division Duplex system and a user equipment thereof. In one embodiment, UE receives downlink signaling to obtain a first configured frame structure, or determining a first configured frame structure by itself in step 1, and transmits a first D2D signaling to indicate the first configured frame structure in step 2; wherein the first configured frame structure indicates a uplink or downlink direction for all the subframes within one radio frame. The technical solution of the disclosure solves the problem of interference of the downlink signals for the UEs configured with different frame structures in D2D communication in eIMTA scenario.Type: GrantFiled: June 9, 2014Date of Patent: August 28, 2018Assignee: SHANGHAI LANGBO COMMUNICATION TECHNOLOGY COMPANY LIMITEDInventor: Li Ma
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Patent number: 9819471Abstract: A method of operating a time division duplex (TDD) wireless communication system is disclosed. The method includes establishing communications with a remote transceiver. A subframe configuration including static and flexible subframes is determined and transmitted to the remote transceiver. A channel state information (CSI) report is received from the remote transceiver in response to the subframe configuration.Type: GrantFiled: October 31, 2014Date of Patent: November 14, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Runhua Chen, Anthony Edet Ekpenyong
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Patent number: 9635489Abstract: The present application relates a signal transmission method for device to device direct communication between user equipments. User equipment first determines, according to a downlink timing reference time, a receiving time for receiving a device to device direct communication D2D signal sent by another user equipment, and then the first user equipment receives, before the receiving time, the D2D signal sent by the second user equipment, thereby improving accuracy of a time for receiving a signal by the user equipment and ensuring completeness of received data.Type: GrantFiled: September 27, 2013Date of Patent: April 25, 2017Assignee: Huawei Device Co., Ltd.Inventor: Jian Wang
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Patent number: 9532340Abstract: A method performed by a network node for enabling Hybrid Automatic Repeat reQuest (HARQ) transmissions in a device-to-device (D2D) communication between a first wireless device and a second wireless device in a wireless telecommunications network is provided. The first and the second wireless device are served by the network node, which transmits information to at least the first and second wireless device indicating transmission resources to be used when transmitting a HARQ acknowledgement (A/N) transmission for a received data transmission in the D2D communication. The network node determines a Time-Division Duplexing (TDD) configuration for data transmissions in the D2D communication between the first and the second wireless device, and transmits the determined TDD configuration to the first and second wireless device.Type: GrantFiled: December 14, 2012Date of Patent: December 27, 2016Inventors: Qianxi Lu, Qingyu Miao, Zhenshan Zhao
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Patent number: 9300311Abstract: A dynamic element matching method for a multi-unit-element digital-to-analog converter having unit elements comprises several steps. An element selection probability is determined as a function of a number of the unit elements and a digital signal. Next, loop filter output signals are generated as a function of the determined element selection probability and control signals for the unit elements. Certain ones of the unit elements are selected as a function of the generated loop filter output signals. The selected certain ones of the unit elements are activated for output of the converter.Type: GrantFiled: April 2, 2014Date of Patent: March 29, 2016Assignee: Amlogic Co., Ltd.Inventors: Jinbao Lan, Haihong Zhao, Yong Zhang, Ming Shi, Shu-Sun Yu, Chieh-Yuan Chao
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Patent number: 9008196Abstract: A computer system includes a processor, and the processor includes at least one interface for communicating with an electronic component. Each of the at least one interface has a set of interface settings. The computer system further includes a memory containing machine executable instructions. Execution of the instructions causes the processor to: monitor communications traffic on the at least one interface; store, eye distribution data acquired during the monitoring of the communications traffic in a database; compare the eye distribution data to a set of predetermined criteria; and generate a set of updated interface settings if the eye distribution does not satisfy the set of predetermined criteria.Type: GrantFiled: April 26, 2012Date of Patent: April 14, 2015Assignee: International Business Machines CorporationInventors: Frank W. Angelotti, Michael D. Campbell, Kenneth L. Christian, Martin Eckert, Hubert Harrer, Rohan Jones, Neil A. Malek, Gary A. Peterson, Andrew A. Turner, Dermot Weldon
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Patent number: 9001638Abstract: To enable an uplink control signal subjected to user multiplexing by an orthogonally multiplexing method using the cyclic shift to be user-demultiplexed, and further enable channel estimation accuracy to be improved, a radio communication method of the invention is characterized in that a mobile terminal apparatus provides a plurality of subcarriers with phase rotation amounts set to minimize the number of unit subcarriers for coherent averaging in association with the number of multiplexed users, and transmits an uplink control signal using the plurality of subcarriers provided with the phase rotation amounts, and that a radio base station apparatus receives the uplink control signal, performs coherent averaging on reference signal using the different number of unit subcarriers corresponding to the number of multiplexed users to demultiplex into a reference signal for each of the users, and estimates a channel variation using the demultiplexed reference signal.Type: GrantFiled: July 29, 2010Date of Patent: April 7, 2015Assignee: NTT DOCOMO, INC.Inventors: Teruo Kawamura, Yoshihisa Kishiyama, Mamoru Sawahashi
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Patent number: 8898053Abstract: An encoding device, a decoding device, and related methods are provided that eliminate the loss of synchronization of the adaptive filters of a terminal at the encoding end and a terminal at the decoding end caused by transmission errors. Deterioration of the sound quality is suppressed when a multiple channel signal is encoded with high efficiency using an adaptive filter. In the terminal at the encoding end, a buffer stores updated filter coefficients. When packet loss detection information indicating whether there is any packet loss in the terminal at the decoding end indicates that there is packet loss, a switch outputs the past filter coefficients of the previous (NX+1) frames from the buffer to an adaptive filter. The adaptive filter uses the past filter coefficients of the previous (NX+1) frames to conduct filtering.Type: GrantFiled: May 21, 2010Date of Patent: November 25, 2014Assignee: Panasonic Intellectual Property Corporation of AmericaInventor: Masahiro Oshikiri
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Patent number: 8890735Abstract: A multi-level sigma-delta Analog to Digital converter provides multi-level outputs using a quantizer with reduced quantization levels. The converter comprises a direct path comprising a computation block, an analog integrator and the quantizer with reduced quantization levels. Further, the converter comprises a feedback path arranged to provide to the computation block a feedback analog signal. The direct path comprises a first amplification block having a gain factor which is the inverse of the gain factor of a second amplification block of the feedback path. The converter allows reduction of the complexity of the quantizer.Type: GrantFiled: October 8, 2012Date of Patent: November 18, 2014Assignee: ST-Ericsson SAInventor: Carlo Pinna
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Patent number: 8831125Abstract: Some of the example embodiments presented herein are directed towards an eNodeB (401), and corresponding method therein, for providing data transmission in a multiple antenna system. The eNodeB (401) may be configured to receive a plurality of signal quality assessments and a CSI report from a user equipment. Based on the received data the eNodeB (401) may determine a received power difference between the received data. The eNodeB (401) may further determine a beamforming direction for subsequent data transmissions. Based on the power difference, the eNodeB (401) may account for the received power difference in the subsequent data transmissions, thus improving data communications towards the user equipment.Type: GrantFiled: June 8, 2012Date of Patent: September 9, 2014Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Niklas Wernersson, David Hammarwall, Svante Bergman
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Patent number: 8687730Abstract: A wireless device includes a channel covariance matrix calculating unit that calculates a covariance matrix based on a channel matrix estimated based on radio signal transmitted from a transmitting station. The wireless device further includes a first metric calculating unit that calculates a first metric based on the calculated covariance matrix. The wireless device further includes a W1 determining unit that calculates a first precoding matrix common to a plurality of bands based on the calculated first metric. The wireless device further includes second metric calculating units that calculate a second metric using the calculated first precoding matrix. The wireless device further includes an optimal CQI/PMI/RI determining unit that calculates a second precoding matrix of each band based on the calculated second metric.Type: GrantFiled: June 8, 2012Date of Patent: April 1, 2014Assignee: Fujitsu LimitedInventors: Daisuke Ogawa, Takashi Dateki
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Patent number: 8654377Abstract: A data communication device includes: a communication execution unit that executes serial communication of an asynchronous type; a bit variance detection block that detects a variance between bits in communication data which the communication execution unit receives from a remote communicating party; a timer that measures a low-level pulse width which is a low-level pulse duration and which is determined with the position of the variance between bits detected by the bit variance detection block; and a control unit that performs transmission speed recognizing processing on the communication data according to the low-level pulse width measured by the timer, wherein based on the confirmation that the low-level pulse width is a low-level pulse width equivalent to a bit width compatible with low-speed communication data, the control unit recognizes the transmission speed for the communication data as a low speed.Type: GrantFiled: October 26, 2009Date of Patent: February 18, 2014Assignee: Sony CorporationInventor: Masashi Kumada
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Patent number: 8643525Abstract: A system and method dynamically selects digital-to-analog (DAC) circuit elements to provide a True differential-output delta-sigma (??) DAC. The sign and magnitude of a received N-bit input code is determined. If the input code comprises a positive value, m+r circuit elements are selected from a plurality of circuit elements by a positive element selector, in which comprises a number of rotational elements, and r circuit elements are selected by a negative element selector. Each selected circuit element comprises a circuit element that was not selected for an immediately preceding received input code and has a corresponding minimum usage count value. If the input digital code comprises a negative value, m+r circuit elements are selected by the negative element selector, and r circuit elements are selected by the positive element selector. The circuit elements are capable of being configured as positive or negative circuit elements.Type: GrantFiled: January 3, 2013Date of Patent: February 4, 2014Assignee: Avnera CorporationInventors: Jianping Wen, Amit Kumar, Garry N. Link, Wai Laing Lee
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Patent number: 8599909Abstract: This disclosure describes systems and methods for determining a voltage margin (or margin) of a serializer/deserializer (SerDes) receiver in mission mode using a SerDes receiver. This is done by time-division multiplexing a margin determination and a tap weight adaptation onto the same hardware (or software, or combination of hardware and software). In other words, some parts of a SerDes receiver (e.g., an error slicer and an adaptation module) can be used for two different tasks at different times without degrading the effectiveness or bandwidth of the receiver. Hence, the disclosed systems and methods allow a SerDes receiver to determine the SerDes margin in mission mode and without any additional hardware or circuitry on the receiver chip.Type: GrantFiled: August 4, 2010Date of Patent: December 3, 2013Assignee: Oracle International CorporationInventors: Drew G. Doblar, Dawei Huang, Deqiang Song
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Patent number: 8559376Abstract: A method and an apparatus for determining transmission power are disclosed. A gain factor of an E-DPDCH in a compressed mode is determined according to the number of E-DPDCHs used for initial transmission of data; and the transmission power of the E-DPDCH is determined according to the gain factor of the E-DPDCH in compressed mode. As the gain factor of E-DPDCH in compressed mode is determined according to the number of the E-DPDCHs for initial transmission of data, the gain factor of the E-DPDCH in compressed mode can be determined accurately, and thus the transmit power of the E-DPDCH can be determined accurately according to the gain factor of the E-DPDCH. Therefore, the waste of transmit power of the E-DPDCH is reduced, and thus the system capacity is improved.Type: GrantFiled: July 31, 2012Date of Patent: October 15, 2013Assignee: Huawei Technologies Co., Ltd.Inventors: Weixin Wang, Xueli Ma, Zongjie Wang
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Single sensor radio scene analysis for packet based radio signals using 2nd and 4th order statistics
Patent number: 8548067Abstract: We consider a problem of radio frequency (RF) signal analysis where one sensing node observes a frequency band possibly used by multiple packet based radio transmitters. Analysis of the received signal includes two steps. In the first step we use a spectrogram to perform temporal segmentation of the received nonstationary signal. This task may be formulated as a clustering problem. In the second step we compute a certain 2-D slice of the fourth order spectrum for each of the segments found in the first step. These fourth order spectrum slices are arraigned in a three-way array. One aspect of the second step is to use uniqueness properties of the low rank decomposition of the three-way array to recover spectra and associated activity sequences of individual components in the received signal. We derive a numerical algorithm for the low rank decomposition, which computes estimates of the spectra and activity sequences by optimizing certain weighted least squares criterion under application specific constraints.Type: GrantFiled: January 31, 2011Date of Patent: October 1, 2013Inventors: Goran Ivkovic, Predrag Spasojevic, Ivan Seskar -
Publication number: 20130142268Abstract: Provided are methods, apparatuses and computer program products for configuring an uplink and downlink splitting pattern for the D2D communication under the cellular network. A method comprises receiving, from a base station, mask information regarding which subframes in a frame for cellular communication may be used for device-to-device communication; and configuring, based upon the mask information, an uplink and downlink splitting pattern for the device-to-device communication, which includes one special downlink subframe, X uplink subframes immediately following the special downlink subframe, and (N?1?X) downlink subframes immediately following the X uplink subframes, wherein integer N is a subframe configuration period, and integer X is the number of uplink subframes included in the subframe configuration period. A further method comprises configuring, by a base station, an uplink and downlink splitting pattern for the device-to-device communication.Type: ApplicationFiled: August 12, 2010Publication date: June 6, 2013Applicant: Nokia CorporationInventors: Chunyan Gao, haiming Wang
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Publication number: 20130094595Abstract: The invention relates to a method in a user equipment for channel estimation, the user equipment communicating within a wireless communication system comprising at least two cells arranged in a layered structure, the at least two cells using at least partly overlapping bandwidth. The user equipment communicates with a base station of an underlaid cell of the layered structure, and the Select resource method comprises the steps of: selecting, from elements carrying CRSs among resource blocks scheduled for the user equipment in the underlaid cell, resource elements carrying cell specific reference symbols, wherein the resource blocks are within bandwidth used by the underlaid cell; and performing the channel estimation by utilizing the selected resource elements carrying cell specific selected resource reference symbols. The invention also relates elements carrying CRSs to user equipment implementing the method.Type: ApplicationFiled: June 30, 2010Publication date: April 18, 2013Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Konstantinos Dimou, Erik Dahlman, Robert Baldemair
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Patent number: 8412258Abstract: Methods and systems for adjusting a transmit power of a forward link or reverse link signal make use of variable adjustment parameters. The wireless signal is received to obtain a received signal. An observed signal-to-noise ratio (SNR) and an observed frame error rate (FER) for the received signal are determined. In an outer loop process, an adjustment increment is selected based on how much the observed FER differs from the target FER, and the target SNR is adjusted by the adjustment increment. In an inner loop process, a power adjustment command is selected based on a comparison between the observed SNR and a target SNR. The power adjustment command instructs the transmitter of the wireless signal to either increase or decrease the transmit power of the wireless signal. The power adjustment increment may also depend on the observed FER.Type: GrantFiled: May 23, 2012Date of Patent: April 2, 2013Assignee: Sprint Spectrum L.P.Inventors: Manoj Shetty, Sachin R. Vargantwar, Siddharth S. Oroskar, Kamal Doshi, Anoop K. Goyal
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Patent number: 8391374Abstract: A method and apparatus to selectively disregard co-channel transmissions on a medium uses an automatic gain control/clear channel assessment (AGC/CCA) circuit to gather signal power information, which is used to establish receiver sensitivity thresholds. Raw and cyclical power measurements of a received signal are processed by the AGC/CCA circuit to determine whether a current received signal process should be halted, and a new signal acquisition sequence begun.Type: GrantFiled: March 11, 2009Date of Patent: March 5, 2013Assignee: QUALCOMM IncorporatedInventors: Paul J. Husted, William J. McFarland
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Patent number: 8331462Abstract: A method and apparatus to selectively disregard co-channel transmissions on a medium uses an automatic gain control/clear channel assessment (AGC/CCA) circuit to gather signal power information, which is used to establish receiver sensitivity thresholds. Raw and cyclical power measurements of a received signal are processed by the AGC/CCA circuit to determine whether a current received signal process should be halted, and a new signal acquisition sequence begun.Type: GrantFiled: July 26, 2007Date of Patent: December 11, 2012Assignee: Qualcomm Atheros, Inc.Inventors: Paul J. Husted, William J. McFarland
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Patent number: 8233440Abstract: A method and an apparatus for determining transmission power are disclosed. A gain factor of an E-DPDCH in a compressed mode is determined according to the number of E-DPDCH used for initial transmission of data; and the transmission power of the E-DPDCH is determined according to the gain factor of the E-DPDCH in compressed mode. As the gain factor of E-DPDCH in compressed mode is determined according to the number of E-DPDCH for initial transmission of data, the gain factor of the E-DPDCH in compressed mode can be determined accurately, and thus the transmit power of the E-DPDCH can be determined accurately according to the gain factor of the E-DPDCH. Therefore, the waste of transmit power of the E-DPDCH is reduced, and thus the system capacity is improved.Type: GrantFiled: September 30, 2011Date of Patent: July 31, 2012Assignee: Huawei Technologies Co., Ltd.Inventors: Weixin Wang, Xueli Ma, Zongjie Wang
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Patent number: 8233439Abstract: A method and an apparatus for determining transmit power are disclosed. The method includes: determining an E-DPDCH gain factor in compressed mode according to the number of E-DPDCH required for initial transmission of data; and determining transmit power of E-DPDCH according to the E-DPDCH gain factor in compressed mode. The E-DPDCH gain factor in compressed mode is determined according to the number of E-DPDCH required for initial transmission of data, and therefore, the E-DPDCH gain factor in compressed mode is determined accurately, the transmit power of E-DPDCH is determined accurately according to the E-DPDCH gain factor, the waste of transmit power of E-DPDCH is reduced, and therefore the system capacity is improved.Type: GrantFiled: April 20, 2011Date of Patent: July 31, 2012Assignee: Huawei Technologies Co., Ltd.Inventors: Weixin Wang, Xueli Ma, Zongjie Wang
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Patent number: 8213979Abstract: Methods and systems for adjusting a transmit power of a forward link or reverse link signal make use of variable adjustment parameters. The wireless signal is received to obtain a received signal. An observed signal-to-noise ratio (SNR) and an observed frame error rate (FER) for the received signal are determined. In an outer loop process, an adjustment increment is selected based on how much the observed FER differs from the target FER, and the target SNR is adjusted by the adjustment increment. In an inner loop process, a power adjustment command is selected based on a comparison between the observed SNR and a target SNR. The power adjustment command instructs the transmitter of the wireless signal to either increase or decrease the transmit power of the wireless signal. The power adjustment increment may also depend on the observed FER.Type: GrantFiled: August 15, 2007Date of Patent: July 3, 2012Assignee: Sprint Spectrum L.P.Inventors: Manoj Shetty, Sachin R. Vargantwar, Siddarth S. Oroskar, Kamal Doshi, Anoop K. Goyal
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Patent number: 8160192Abstract: A clock and data recovery (CDR) system and method for recovering timing information and data from a serial data stream. The CDR system includes a sampling circuit that produces a recovered clock/data signal and an interleaving feedback network that provides feedback to the sampling circuit. The feedback network includes a logic circuit that produces control signals based on the recovered clock/data signal, a first multiplexer that selects from four phases of a global clock signal based on a control signal, a first delay-locked loop having a first set of delay cells coupled to a second multiplexer that produces a delayed signal based on the selected global clock signal, and a second delay-locked loop having a second set of delay cells that produces a set of phase-shifted feedback signals that are applied to the sampling circuit to phase-align the sampling circuit with the transitions in the received serial data stream.Type: GrantFiled: September 25, 2007Date of Patent: April 17, 2012Assignee: Silicon Image, Inc.Inventors: Dongyun Lee, Sungjoon Kim
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Patent number: 8156266Abstract: A method for determining transfer rate comprising selecting a first transfer rate of a plurality of transfer rates, transmitting a message at the first transfer rate over a Consumer Electronics Control (CEC) line of a High Definition Multimedia Interface (HDMI) network, determining whether an acknowledgment to the message having been transmitted at the first transfer rate is received, storing, in the event the acknowledgment to the message having been transmitted at the first transfer rate is received, the first transfer rate and storing, in the event no acknowledgment is received, a default transfer rate of the plurality of transfer rates.Type: GrantFiled: September 23, 2010Date of Patent: April 10, 2012Assignees: Sony Corporation, Sony Electronics Inc.Inventors: Davender Agnihotri, Lee Pedlow
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Patent number: 8126042Abstract: Embodiments related to FEXT estimation and signaling in vectored systems are described and depicted herein.Type: GrantFiled: August 6, 2008Date of Patent: February 28, 2012Assignee: Lantiq Deutschland GmbHInventors: Heinrich Schenk, Vladimir Oksman
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Patent number: 8098743Abstract: In a pilot signal transmission method for raising the SIR measurement accuracy for transmission power control during high-speed transmission and thus reducing the block error rate and improving the throughput, a first SIR value measured by first pilot signals and second SIR value measured by second pilot signals are first compared, and the presence or absence of second pilot signals then determined in slot units based on the comparison results. When the second pilot signals exist, the second pilot signals are used in addition to the first pilot signals in the SIR measurement for high-speed closed-loop transmission power control. When the second pilot signals do not exist, only the first pilot signals are used in the SIR measurement for high-speed closed-loop transmission power control.Type: GrantFiled: August 4, 2005Date of Patent: January 17, 2012Assignee: NEC CorporationInventors: Nahoko Kuroda, Jinsock Lee, Kojiro Hamabe, Akihisa Ushirokawa
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Patent number: 8094761Abstract: A quantization method of transmission of channel quality information (CQI) includes measuring two measurements SINRs and calculating a difference (i.e., Delta SINR) between the two measurements of the SINRs; determining a CQIbase (base channel quality information) based on one of the two measurements SINRs and a known quantization table for the CQIbase, and simultaneously receiving cell-specific or UE-specific parameters transmitted from a base station and configuring a quantization table defining a mapping method of CQIdelta (delta channel quality information) and the Delta SINR and determining the CQIdelta based on the obtained Delta SINR and the configured quantization table; and transmitting the resulting CQIdelta and CQIbase.Type: GrantFiled: September 29, 2008Date of Patent: January 10, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jianzhong Zhang, Juho Lee, Farooq Khan, Zhouyue Pi
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Patent number: 8054905Abstract: In a method for determining channel quality information in a high speed packet access communication system with closed loop transmit diversity, power and variance related to a common pilot channel (CPICH) are determined for a rake receiver to obtain a closed loop transmit gain adjustment and to determine the CPICH signal-to-noise ratio. Thereafter, a high speed downlink shared channel (HS-DSCH) signal-to-noise ratio is determined from the CPICH signal-to-noise ratio and is mapped to derive channel quality information.Type: GrantFiled: July 26, 2006Date of Patent: November 8, 2011Assignee: NEC CorporationInventors: Mikhail Shnaider, Quang Nguyen
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Patent number: 8018914Abstract: A demodulation section 13 receives a TDMA-TDD based phase-modulated burst signal of mobile communications and demodulates the burst signal by a synchronous detection system (or a quasi-synchronous detection system). The demodulation section 13 includes a frequency deviation compensation section and a carrier recovery section each having a loop filter 14 with three or more stages of time constants. The time constants are switched by a selector switch 15 based on a control signal from a demodulation control section 16. This achieves quick pull-in and jitter after convergence is minimized, thereby allowing highly efficient performance of frequency deviation compensation, etc. that is required for synchronous detection (or quasi-synchronous detection) without increasing the size of circuit.Type: GrantFiled: May 17, 2004Date of Patent: September 13, 2011Assignee: Mitsubishi Electric CorporationInventor: Taisei Suemitsu
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Patent number: 7965157Abstract: Briefly, in accordance with one embodiment of the invention, a resonator such as an electromechanical resonator may be coupled with a cancellation network to reduce and/or cancel an anti-resonance effect in the resonator, which may be due to, for example, a static capacitance inherent in the resonator. Cancellation of an anti resonance effect from the resonator response may allow a resonance effect of the resonator to be a predominant effect to allow the resonator to be utilized as a bandpass filter having a relatively higher Q, for example in a bandpass sigma-delta modulator that may be utilized in a digital RF receiver.Type: GrantFiled: July 20, 2005Date of Patent: June 21, 2011Assignee: National University of SingaporeInventors: Yong Ping Xu, Rui Yu
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Method and arrangement for reducing the mutual interference of network subscribers in radio networks
Patent number: 7945210Abstract: The object of the invention, which relates to a method and an arrangement for reducing the mutual interference of network subscribers in radio networks, is to provide a solution by means of which data collisions are reduced and thus the data throughput rate of a radio cell is increased. According to the invention, this object is achieved in terms of the method in that the cell size of a radio cell is adjusted by reducing the receiver sensitivity of one or more devices belonging to the radio cell if the device receives interference which disrupts its communication from another device belonging to a different radio cell.Type: GrantFiled: December 13, 2005Date of Patent: May 17, 2011Assignee: NXP B.V.Inventor: Volker Aue