Loopback Mode Patents (Class 375/221)
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Patent number: 11916850Abstract: In one embodiment, a method receives a downstream signal and an upstream signal in a same frequency band. The downstream signal and the upstream signal are separated into a first path and a second path. The downstream signal using the first path and the upstream signal using the second path are amplified in an analog domain. The method isolates the downstream signal and the upstream signal from one another and sends the downstream signal downstream to a subscriber device and sends the upstream signal towards a full duplex node.Type: GrantFiled: March 9, 2023Date of Patent: February 27, 2024Assignee: ARRIS Enterprises LLCInventors: David B. Bowler, Clarke V. Greene, Ayham Al-Banna
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Patent number: 11871262Abstract: Wireless devices may receive channel state information (CSI) measurement resources for a plurality of cells, including cells of a first transmission point and cells of a second transmission point. The wireless device may measure CSI for each cell, and may quantize the measured CSI jointly across the cells. The wireless device may send the jointly quantized CSI to a base station, and the jointly quantized CSI may be used in communications via the first transmission point and the second transmission point.Type: GrantFiled: February 9, 2023Date of Patent: January 9, 2024Assignee: Comcast Cable Communications, LLCInventor: Esmael Hejazi Dinan
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Patent number: 11695614Abstract: A method of compensating for IQ mismatch (IQMM) in a transceiver may include sending first and second signals from a transmit path through a loopback path, using a phase shifter to introduce a phase shift in at least one of the first and second signals, to obtain first and second signals received by a receive path, using the first and second signals received by the receive path to obtain joint estimates of transmit and receive IQMM, at least in part, by estimating the phase shift, and compensating for IQMM using the estimates of IQMM. Using the first and second signals received by the receive path to obtain estimates of the IQMM may include processing the first and second signals received by the receive path as a function of one or more frequency-dependent IQMM parameters.Type: GrantFiled: October 6, 2020Date of Patent: July 4, 2023Inventors: Elina Nayebi, Pranav Dayal, Kee-Bong Song, Siu-Chuang Ivan Lu, Sang Won Son
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Patent number: 11632259Abstract: Methods, apparatus, and processor-readable storage media for pairing multiple devices into a designated group for a communication session are provided herein. An example computer-implemented method includes processing, via at least a portion of multiple processing devices, information associated with a network in connection with one or more device pairing requests from one or more of the processing devices; implementing, via at least one the multiple processing devices, a pairing algorithm, wherein the pairing algorithm comprises searching for one or more of the processing devices, in accordance with one or more temporal values associated with the at least one processing device and at least one of the one or more device pairing requests corresponding thereto, and one or more pairing parameters; and automatically pairing, via the network and based on the pairing algorithm, the at least one processing device to one or more of the processing devices.Type: GrantFiled: February 22, 2021Date of Patent: April 18, 2023Assignee: Lynq Technologies, Inc.Inventors: Abhishek Vishwakarma, Justin Lange, John M. De Cristofaro, Thomas Mwakibinga, Shane Wicks
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Patent number: 11611897Abstract: Wireless devices may receive channel state information (CSI) measurement resources for a plurality of cells, including cells of a first transmission point and cells of a second transmission point. The wireless device may measure CSI for each cell, and may quantize the measured CSI jointly across the cells. The wireless device may send the jointly quantized CSI to a base station, and the jointly quantized CSI may be used in communications via the first transmission point and the second transmission point.Type: GrantFiled: June 24, 2022Date of Patent: March 21, 2023Assignee: Comcast Cable Communications, LLCInventor: Esmael Hejazi Dinan
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Patent number: 11611426Abstract: A multi-lane transmitting apparatus includes lanes, and each lane includes a serializer circuit to convert parallel bits to serial bits. A clock signal generator generates a first clock signal having phases. A deserializer circuit converts serial bits to parallel bits. A Built-In Self-Test (BIST) circuit includes a signal generator circuit for generating a signal having bits in a defined pattern. A comparator circuit compares a pattern of bits of an output signal with the defined pattern. A BIST lane circuit monitors a status of the lanes. A BIST central circuit receives the status and determines if a number of lanes having an unmatched status is less than a threshold value. A phase extrapolator circuit adjusts a phase of the first clock signal when the number of the lanes is less than the threshold value.Type: GrantFiled: September 9, 2021Date of Patent: March 21, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Nageswara Rao Kunchapu, Tamal Das, Akshay Karkal Kamath, Mohit Arora
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Patent number: 11539556Abstract: A transceiver architecture supports high-speed communication over a signal lane that extends between a high-performance integrated circuit (IC) and one or more relatively low-performance ICs employing less sophisticated transmitters and receivers. The architecture compensates for performance asymmetry between ICs communicating over a bidirectional lane by instantiating relatively complex transmit and receive equalization circuitry on the higher-performance side of the lane. Both the transmit and receive equalization filter coefficients in the higher-performance IC may be adaptively updated based upon the signal response at the receiver of the higher-performance IC.Type: GrantFiled: August 12, 2021Date of Patent: December 27, 2022Assignee: Rambus Inc.Inventors: Jared L. Zerbe, Fariborz Assaderaghi, Brian S. Leibowitz, Hae-Chang Lee, Jihong Ren, Qi Lin
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Patent number: 11342994Abstract: A multimode combiner or coupler (MMC) may combine the inputs into a larger core multimode fiber. The multimode combiner may be combined with a re-transmitting laser for detecting and re-transmitting signals. Thus, the multi-mode combiner may detect and combine input signals, and then retransmit the detected, combined signal. The detection can be implemented with multiple single mode fibers to small single mode detectors or a multi-mode coupler with a larger multi-mode detectors. In embodiments of the MMC, a bi-directional optical splitter/combiner includes a transmitter for re-transmitting an RF signal received at a receiver, a first wave division multiplexer (WDM) combiner combining the output of the first transmitter in an upstream direction to a downstream signal in a downstream direction, and a second WDM combiner combining split downstream signals in the downstream direction with upstream signals received via at least two optical fiber inputs.Type: GrantFiled: April 6, 2021Date of Patent: May 24, 2022Assignee: ARRIS Enterprises LLCInventors: Venkatesh G. Mutalik, Marcel F. Schemmann, Dean Stoneback, John Chrostowski
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Patent number: 11038748Abstract: A multi-lane communication interface is provided for use in a link, such as SpaceFibre used on-board spacecraft. The interface has logic, when operating at a near end in cooperation with a far-end multi-lane communication interface, to: establish symbol synchronisation with the far-end over one or more lanes; send and receive data words to and from the far-end while maintaining the symbol synchronisation (A); detect a change in lane status; and upon detection of the change in lane status and while maintaining the symbol synchronisation: stop sending (B) data words; send (B) near-end lane-status control words to the far end instead of data words, until it is determined that the near end is ready to send data words, then resume sending (C) data words; and send (C) near-end lane-alignment signals to the far end, until a data word is received from the far end.Type: GrantFiled: January 27, 2017Date of Patent: June 15, 2021Assignee: STAR-DUNDEE LIMITEDInventor: Albert Ferrer Florit
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Patent number: 11018840Abstract: Embodiments of the present disclosure relate to multi-band FDD transceivers. An example transceiver includes a LO, configured to generate a LO signal to be shared between a receiver and a transmitter of the transceiver. Both the receiver and the transmitter use quadrature signal processing and are configured to multi-band operation. Sharing a single LO to perform frequency conversion of different frequency bands of received and transmitted signals advantageously allows reducing the number of LOs used in a multi-band FDD transceiver.Type: GrantFiled: February 11, 2019Date of Patent: May 25, 2021Assignee: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANYInventors: Antonio Montalvo, Michael Cobb, Qi Guo, Hao Jing
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Patent number: 10931384Abstract: A closed loop transmitter (Tx) calibration system is disclosed. The closed loop Tx calibration system comprises a transmitter circuit configured to generate a Tx output signal at a Tx output frequency based on a Tx local oscillator (LO) signal. The closed loop Tx calibration system further comprises a loop back (LPBK) receiver circuit coupled to the transmitter circuit and configured to downconvert the Tx output signal at the Tx output frequency to form an LPBK baseband signal at an LPBK intermediate frequency (IF), based on an LPBK LO signal. In some embodiments, the LPBK IF frequency is different from zero. In some embodiments, the closed loop Tx calibration system further comprises an LO generation circuit configured to generate the Tx LO signal and the LPBK LO signal from a single phase locked loop (PLL) source, based on utilizing a digital to time converter (DTC) circuit.Type: GrantFiled: December 26, 2019Date of Patent: February 23, 2021Assignee: Intel CorporationInventors: Eli Borokhovich, Assaf Ben-Bassat, Shahar Gross, Nahum Kimiagarov
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Patent number: 10924310Abstract: Methods and systems of performing feed forward equalization (FFE) on data streams are described. A circuitry may generate staggered data streams from data streams of an input signal. The staggered data streams may include data in staggered unit intervals. The circuitry may include a plurality of segments. A segment may define a specific unit interval to carve the staggered data streams into one unit interval pulses positioned at the specific unit interval. The specific unit interval to carve the staggered data streams may indicate an assignment of the segment as one of a FFE pre tap, a FFE main tap, and a FFE post tap. The plurality of segments may be assigned to different FFE taps based on different clock signal selection defining different unit intervals to perform the carving. The plurality of segments may output respective one unit interval pulses to reproduce the input signal.Type: GrantFiled: February 15, 2019Date of Patent: February 16, 2021Assignee: International Business Machines CorporationInventors: Zeynep Toprak-Deniz, John F. Bulzacchelli, Herschel A. Ainspan, Jonathan E. Proesel, Mounir Meghelli
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Patent number: 10924987Abstract: Methods for performing error recovery during a ranging procedure may include negotiation one or more ranging parameters, including a set of secure training sequences and receipt of a first ranging frame that may include a first dialog token and may have an appended first secure training sequence. The first ranging frame may be decoded based on the first dialog token but not correlated based on the first secure training sequence. A first acknowledgment that may include an appended second secure training sequence may be transmitted. The second secure training sequence may be associated with a prior dialog token. A second ranging frame that may include a second dialog token and may have an appended third secure training sequence may be received. The second ranging frame may be decoded based on the third dialog token and correlated based on the third secure training sequence.Type: GrantFiled: September 9, 2019Date of Patent: February 16, 2021Assignee: Apple Inc.Inventors: Su Khiong Yong, Christiaan A. Hartman, Jarkko L. Kneckt, Mingguang Xu, Mithat C. Dogan, Yong Liu
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Patent number: 10917807Abstract: Wireless devices may receive channel state information (CSI) measurement resources for a plurality of cells, including cells of a first transmission point and cells of a second transmission point. The wireless device may measure CSI for each cell, and may quantize the measured CSI jointly across the cells. The wireless device may send the jointly quantized CSI to a base station, and the jointly quantized CSI may be used in communications via the first transmission point and the second transmission point.Type: GrantFiled: April 20, 2020Date of Patent: February 9, 2021Assignee: Comcast Cable Communications, LLCInventor: Esmael Hejazi Dinan
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Patent number: 10903866Abstract: A system for generating a self-receive signal includes: a signal generator; a first signal processor; a second signal processor; and an antenna. The system also includes a first passive coupling device: defining a first input port electromagnetically coupled to the signal generator; defining a first transmitted port; defining a first coupled port electromagnetically coupled to the first signal processor; and characterized by a first phase balance between the first transmitted port and the first coupled port. The system further includes a second passive coupling device: defining a second input port electromagnetically coupled to the antenna; defining a second transmitted port electromagnetically coupled to the first transmitted port; defining a second coupled port electromagnetically coupled to the second signal processor; and characterized by a second phase balance between the second transmitted port and the second coupled port substantially similar to the first phase balance.Type: GrantFiled: December 18, 2019Date of Patent: January 26, 2021Assignee: ZaiNar, Inc.Inventors: Philip Kratz, Mainak Chowdhury
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Patent number: 10841337Abstract: Systems and methods for reversibly remediating security risks, which monitor a network or system for security risks, and upon detection of one or more of risks, apply a remedial action applicable to at least partially remedy or mitigate the one or more detected risk. The network or system is monitored for a change to the detected risk(s), and upon detection of a change to the detected risk(s), the applied remediation action is automatically reversed.Type: GrantFiled: November 17, 2017Date of Patent: November 17, 2020Assignee: SECUREWORKS CORP.Inventors: Ross Rowland Kinder, William Urbanski, Ryan James Leavengood, Timothy Vidas, Jon Ramsey
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Patent number: 10833742Abstract: Facilitating a determination of channel state information for advanced networks (e.g., 4G, 5G, and beyond) is provided herein. Operations of a system can comprise configuring a mobile device with a demodulation reference signal. The operations can also comprise transmitting a channel state information reference signal to the mobile device, wherein the channel state information reference signal configures a number of channel state information reference signal ports. Operations of another system can comprise determining a number of resources for a group of transmission ranks and determining a link quality metric for transmission ranks of the group of transmission ranks. The operations can also comprise selecting a transmission rank and a precoding matrix indicator and transmitting the precoding matrix indicator to a network device.Type: GrantFiled: April 12, 2019Date of Patent: November 10, 2020Assignee: AT&T Intellectual Property I, L.P.Inventor: SaiRamesh Nammi
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Patent number: 10804904Abstract: A multi-lane transmitter and method of detecting a sync loss are provided. The method includes generating a high-speed clock signal and a sync reset signal synchronized to the high-speed clock signal. A sync loss pulse is generated based on the high-speed clock signal, and the sync loss pulse is provided to each of plural serializer circuits. Each serializer circuit generates a sampled sync loss signal by sampling the sync loss pulse in accordance with a parallel clock signal, and a Boolean value is assigned to the sampled sync loss signal and output. A logic block detects a sync loss when the sampled sync loss signal of any serializer circuit is out of sync from the sync loss pulse based on the Boolean value.Type: GrantFiled: December 23, 2019Date of Patent: October 13, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Tamal Das, Nageswara Rao Kunchapu, Umamaheswara Reddy Katta
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Patent number: 10763935Abstract: Facilitating generic feedback to enable reciprocity and over the air calibration for advanced networks (e.g., 4G, 5G, and beyond) is provided herein. Operations of a system can comprise selecting information to include in a channel state information feedback report based on a feedback instance. The operations can also comprise generating the channel state information feedback report as a function of channel statistics of channels. Further, the operations can comprise transmitting the channel state information feedback report to a network device of a communications network.Type: GrantFiled: August 9, 2018Date of Patent: September 1, 2020Assignee: AT&T Intellectual Property I, L.P.Inventors: Salam Akoum, Xiaoyi Wang, Arunabha Ghosh, Aditya Chopra
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Patent number: 10673665Abstract: Disclosed is a method for a station (STA) device transmitting data in a wireless local area network (WLAN) system. The method for transmitting data, according to one embodiment of the present invention, comprises the steps of: FEC encoding transmission data; constellation mapping the transmission data; inserting a pilot tone in the transmission data; performing Inverse Discrete Fourier Transform (IDFT) on the transmission data; and upconverting the transmission data and transmitting a transmission signal, wherein, if an Orthogonal Frequency Division Multiple Access (OFDMA) scheme is applied to the transmission signal, the transmission signal comprises at least one tone unit which is the unit of subcarrier allocation of the OFDMA scheme.Type: GrantFiled: August 4, 2015Date of Patent: June 2, 2020Assignee: LG ELECTRONICS INC.Inventors: Eunsung Park, Wookbong Lee, Jinsoo Choi, Hangyu Cho
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Patent number: 10667164Abstract: A wireless device receives messages indicating CSI measurement resources related to transmission points. For example, the CSI measurement resources may be for cells belonging to at least two base stations or belonging to at least two sectors of a base station. The wireless device measures CSI employing at least CSI measurement resources of the cells. The wireless device quantizes the measured CSI jointly across cells and encodes and transmits the jointly quantized CSI. The wireless device receives a resource assignment for data packet(s). The wireless device receives signals carrying the data packets from multiple cells.Type: GrantFiled: May 23, 2019Date of Patent: May 26, 2020Assignee: Comcast Cable Communications, LLCInventor: Esmael Hejazi Dinan
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Patent number: 10515240Abstract: An RFID echo cancellation assembly includes: a circulator defining a transmission path from a transmit module to an antenna module, and a reception path from the antenna module to a receive module; a combiner on the reception path between the circulator and the receive module; a variable reflector for applying a cancellation signal to the combiner; a controller for setting an operational parameter at the variable reflector according to an attribute of a transmitted signal from the transmit module; and a coupler defining a segment of the transmission path between the transmit module and the circulator, and a cancellation path between the variable reflector and the combiner. The coupler couples a portion of the transmitted signal to the variable reflector, whereupon the variable reflector generates the cancellation signal based on the operational parameter, for transmission to the combiner via the cancellation signal path.Type: GrantFiled: October 23, 2018Date of Patent: December 24, 2019Assignee: Zebra Technologies CorporationInventors: Mark W. Duron, Michael J. Koch, Amit Asthana
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Patent number: 10516439Abstract: In one example a controller comprises logic, at least partially including hardware logic, configured to implement a first iteration of an interference test on a communication interconnect comprising a victim lane and a first aggressor lane by generating a first set of pseudo-random patterns on the victim lane and the aggressor lane using a first seed and implement a second iteration of an interference test by advancing the seed on the first aggressor lane. Other examples may be described.Type: GrantFiled: August 1, 2017Date of Patent: December 24, 2019Assignee: Intel CorporationInventors: Alexey Kostinsky, Tomer Levy, Paul S. Cheses, Danny Naiger, Theodore Z. Schoenborn, Christopher P. Mozak, Nagi Aboulenein, James M. Shehadi
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Patent number: 10484106Abstract: An array of antenna elements are located in relation with a plurality of pre-characterized reference detectors. At baseband frequencies, a transmit radiation pattern of the array of antenna elements is sensed with the plurality of pre-characterized reference detectors, at a plurality of phase and gain settings, to detect mismatch among two or more elements of the array of antenna elements. Phase and gain settings for the array of antenna elements are updated to correct the mismatch.Type: GrantFiled: May 5, 2016Date of Patent: November 19, 2019Assignee: International Business Machines CorporationInventors: Alberto Valdes Garcia, Bodhisatwa Sadhu, Yahya Mesgarpour Tousi
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Patent number: 10476576Abstract: A method for transmitting feedback configuration information by a terminal configured to perform communication through a channel in a wireless communication system is provided. The method includes configuring channel component information for separating each of a plurality of channel elements of the channel according to components of the plurality of channel elements; configuring grouping information for grouping the plurality of channel elements; configuring order sorting information for sorting an order of the plurality of channel elements; configuring probability distribution approximation information for probability distribution approximating the plurality of channel elements; and transmitting the configured channel component information, grouping information, order sorting information, and probability distribution approximation information.Type: GrantFiled: June 27, 2018Date of Patent: November 12, 2019Assignees: Samsung Electronics Co., Ltd, Industry-Academic Cooperation Foundation, Yonsei UniversityInventors: Hoon-Dong Noh, Sooyong Choi, Youngrok Jang, Young-Woo Kwak, Youn-Sun Kim, Dongheon Lee, Seongbae Han
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Patent number: 10447335Abstract: A front end module having transmit loopback functionality may be operated by conducting a loopback signal from an output of a power amplifier to a receive port on a transmit loopback path and conducting a radio frequency receive signal from an antenna port to the receive port on a receive path. The transmit loopback path includes a first switch coupled between the output of the power amplifier and the receive port. The receive path includes a second switch coupled between the antenna port, where the receive port and is without the first switch.Type: GrantFiled: March 8, 2018Date of Patent: October 15, 2019Assignee: Skyworks Solutions, Inc.Inventors: Joseph Anton Pusl, III, Craig Joseph Christmas
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Patent number: 10447336Abstract: A front end module with transmit loopback functionality has a transmit loopback path that is configured to conduct a loopback signal from an output of a power amplifier to a receive port, and a receive path that is configured to conduct a radio frequency receive signal from an antenna port to the receive port. The transmit loopback path includes a first switch coupled between the output of the power amplifier and the receive port. The receive path includes a second switch coupled between the antenna port and the receive port, where the receive path is without the first switch.Type: GrantFiled: March 8, 2018Date of Patent: October 15, 2019Assignee: Skyworks Solutions, Inc.Inventors: Joseph Anton Pusl, III, Craig Joseph Christmas
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Patent number: 10411923Abstract: A high-speed signaling system with adaptive transmit pre-emphasis. A transmit circuit has a plurality of output drivers to output a first signal onto a signal path. A receive circuit is coupled to receive the first signal via the signal path and configured to generate an indication of whether the first signal exceeds a threshold level. A first threshold control circuit is coupled to receive the indication from the receive circuit and configured to adjust the threshold level according to whether the first signal exceeds the threshold level. A drive strength control circuit is coupled to receive the indication from the receive circuit and configured to adjust a drive strength of at least one output driver of the plurality of output drivers according to whether the first signal exceeds the threshold level.Type: GrantFiled: June 7, 2017Date of Patent: September 10, 2019Assignee: Rambus Inc.Inventors: Vladimir M. Stojanovic, Andrew C. Ho, Anthony Bessios, Fred F. Chen, Elad Alon, Mark A. Horowitz
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Patent number: 10390352Abstract: Disclosed is a method and apparatus for transmitting channel state information (CSI) by a user equipment in a mobile communication system. The method includes receiving a CSI-reference signal (CSI-RS) for measuring a state of a downlink channel and a CSI feedback-related configuration from a base station (BS); determining a channel quality indication (CQI) for at least one transmission point and control information for determining a CQI for multiple transmission points, based on the received CSI-RS and CSI feedback-related configuration; and transmitting the determined CQI for the at least one transmission point and control information to the BS.Type: GrantFiled: October 5, 2012Date of Patent: August 20, 2019Assignee: Samsung Electronics Co., LtdInventors: Youn-Sun Kim, Ki-Il Kim, Ju-Ho Lee, Hyo-Jin Lee, Joon-Young Cho, Seung-Hoon Choi
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Patent number: 10225021Abstract: A high data rate, high sensitivity, low power optical link using low-bandwidth components and low-bandwidth E/O drivers and receivers and method of building same. The method is based on the idea of making the optical part of the link look like a bandwidth limited lossy electrical channel, so that the powerful equalization methods used in the wireline electrical links can be applied to recover the transmitted data in a situation with low bandwidth and/or high loss and strong inter-symbol interference. Linear and non-linear optical channel components, E/O drivers and receivers can benefit from the apparatus and the methods of the invention.Type: GrantFiled: March 9, 2018Date of Patent: March 5, 2019Assignee: Elenion Technologies, LLCInventors: Alexander Rylyakov, Richard Younce, Ran Ding, Peter D. Magill, Hao Li, Michael J. Hochberg
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Patent number: 10164761Abstract: Methods and systems are provided for using error related feedback during signal processing. During handling of an input signal, each of a plurality of sub-carriers in the input signal is processed, and error-related information for each one of the plurality of sub-carriers is determined based on the processing. Aggregate error-related information is generated based on error-related information of each of one of the plurality of sub-carriers, and subsequent processing of at least one of the sub-carriers is adjusted based on the aggregate error-related information. The error-related information may comprise phase error-related information. Adjustments to subsequent processing of one or more of the sub-carriers may be determined based on processing-related information corresponding to different stages during processing of each of the plurality of sub-carriers.Type: GrantFiled: October 6, 2017Date of Patent: December 25, 2018Assignee: MAXLINEAR, INCInventors: Curtis Ling, Timothy Gallagher
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Patent number: 10148417Abstract: A method and system for duty-cycled high speed clock and data recovery with forward error correction are provided. The system operates on a first digital signal comprising a first plurality of samples and a second digital signal comprising a second plurality of samples. The second plurality of samples may be a subset of the first plurality of samples, for example, if the first and second pluralities of samples are generated by one analog-to-digital converter. A clock and data recovery module is operable to produce a timing indication according the second digital signal. The second plurality of samples is sampled intermittently. The discontinuity between bursts of samples in the second signal corresponds to a duty cycle. A forward error correction module is operable to produce a digital error-corrected signal according to the first digital signal and the timing indication.Type: GrantFiled: June 17, 2016Date of Patent: December 4, 2018Assignee: Maxlinear, Inc.Inventors: Curtis Ling, Sheng Ye
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Patent number: 10135641Abstract: A serializer-deserializer (SerDes) integrated circuit (IC) chip includes a first SerDes receiver circuit having a first input for coupling to a first SerDes link, and a first output. A second SerDes receiver circuit has a second input for coupling to a second SerDes link. The second SerDes receiver circuit includes a second output. Crosstalk filter circuitry is disposed between the first SerDes receiver circuit and the second SerDes receiver circuit.Type: GrantFiled: January 4, 2017Date of Patent: November 20, 2018Assignee: Aquantia Corp.Inventor: Hossein Sedarat
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Patent number: 10085165Abstract: A wireless device receives messages indicating CSI measurement resources of cells belonging to at least two base stations or belonging to at least two sectors of a base station. The wireless device measures CSI employing at least CSI measurement resources of the cells. The wireless device quantizes the measured CSI jointly across cells and encodes and transmits the jointly quantized CSI. The wireless device receives a resource assignment for data packet(s). The wireless device receives signals carrying the data packets from multiple cells.Type: GrantFiled: July 11, 2015Date of Patent: September 25, 2018Assignee: Comcast Cable Communications, LLCInventor: Esmael Hejazi Dinan
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Patent number: 10020836Abstract: Methods and systems for reducing and eliminating the effects of reference signal leakage in multi-module radio-frequency systems, particularly for radio-frequency integrated-circuit devices. Isolation is provided by frequency shifting, by binary phase-shift keying of reference signals to furnish different reference signals with unique signatures to enable separation and discrimination, and by backwards sending of reference signals from receiver to transmitter to avoid contamination of receiver signals by leakage of transmitter reference signals. In addition to improving calibration, methods of the present invention also provide noise reduction in certain multiple-module radio frequency systems.Type: GrantFiled: March 30, 2017Date of Patent: July 10, 2018Assignee: VAYYAR IMAGING LTD.Inventors: Naftali Chayat, Jonathan Rosenfeld
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Patent number: 10009126Abstract: Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) with multiple RF signal transmitters and RF signal receivers capable of concurrent operations. Multiple successions of test data packets from a tester to respective RF signal receivers of the DUT and multiple successions of responsive DUT data packets from respective RF signal transmitters of the DUT to the tester are conveyed such that multiple RF signal transmissions, multiple RF signal receptions, or RF signal transmission and reception are performed at least partially concurrently.Type: GrantFiled: December 11, 2015Date of Patent: June 26, 2018Assignee: LitePoint CorporationInventors: Christian Volf Olgaard, Ruizu Wang, Zhiyong Huang
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Patent number: 9954594Abstract: A method of channel estimation enhancement is provided. In a wireless communications system, a transmitting device transmits a long preamble frame comprising a first training field, a signal field, and a second training field. The signal field has a beam-change indicator bit indicates whether there is beam change between the first training field and the second training field. A receiving device receives the long preamble frame, performs a first channel estimation based on the first training field, and performs a second channel estimation based on the second training field. If the beam-change indicator bit indicates negative beam change, then the receiving device performs channel estimation enhancement by combining the first channel estimation and the second channel estimation. As a result, channel estimation performance is improved.Type: GrantFiled: March 7, 2016Date of Patent: April 24, 2018Assignee: MEDIATEK Singapore Pte. Ltd.Inventors: Jianhan Liu, Thomas Edward Pare, Jr., Chao-Chun Wang, James June-Ming Wang, YungPing Hsu
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Patent number: 9887796Abstract: The present disclosure discloses a method for configuring a node, device and system. The method includes that: a sending node encapsulates configuration information in a wavelength label information frame, wherein the configuration information is configured to configure a downstream node; and the sending node loads the wavelength label information frame to an optical signal, and sends the wavelength label information frame and the optical signal.Type: GrantFiled: May 20, 2014Date of Patent: February 6, 2018Assignee: ZTE CorporationInventors: Feng Hua, Huitao Wang, Bailin Shen
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Patent number: 9787462Abstract: Methods and systems are provided for using decision feedback phase error correction during signal processing. When an input signal comprises a plurality of sub-carriers, each of the plurality of sub-carriers may be processed separately, for each one of the plurality sub-carriers error related information may be determined separately, based on the processing of that sub-carrier. Subsequent processing of at least one of the plurality of sub-carriers may then be adjusted based on determined error related information corresponding to one or more sub-carriers. In this regard, the subsequent processing of the at least one sub-carrier may be adjusted based on determined error related information for that sub-carrier, based on determined error related information for at least one other sub-carrier, or based on determined error related information corresponding to all of the sub-carriers. The error related information may comprise phase error related information.Type: GrantFiled: October 13, 2015Date of Patent: October 10, 2017Inventors: Curtis Ling, Timothy Gallagher
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Patent number: 9768987Abstract: Systems and methods are provided for dynamic calibration of pre-distortion modification in transmitters. The pre-distortion modification may be applied during processing of an input signal for transmission, and feedback data, relating to the transmitter and/or processing performed after application of the pre-distortion modification in the transmitter, may be obtained. Adjustments to the pre-distortion modification may be determined based on the feedback data, and the adjustments to the pre-distortion modification may be applied in loop-back manner, thus enabling adjustment of pre-distortion modification dynamically based on real-time and current data. The pre-distortion modification may comprise modifying one or more signal characteristics, such as phase, frequency, and/or amplitude. Determining and/or applying the adjustments to the pre-distortion modification may be done periodically, based on one or more particular events, or conditionally.Type: GrantFiled: January 13, 2015Date of Patent: September 19, 2017Assignee: MAXLINEAR, INC.Inventors: Sridhar Ramesh, Timothy Gallagher, Ali Shahed hagh ghadam
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Patent number: 9749025Abstract: A method and a radio apparatus for signal transmission in a Wireless Local Area Network (WLAN) system are discussed. The method according to an embodiment includes generating first and second very high throughput (VHT) fields including first and second control information, respectively; and transmitting a physical layer protocol data unit (PPDU) including the first and second VHT fields to at least one target station. The first VHT field includes an indicator indicating whether the PPDU is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme.Type: GrantFiled: June 24, 2016Date of Patent: August 29, 2017Assignee: LG ELECTRONICS INC.Inventors: Dae Won Lee, Dong Wook Roh, Byeong Woo Kang, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim
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Patent number: 9735811Abstract: A method and apparatus for compensating for nonlinearities in a non-linear device for manipulating a signal is described. Shortly before an initial discrete power increase is applied to the device, a first pre-distortion function is generated on the basis of a first set of DPD parameters and applied to the signal before it reaches the device. A predetermined time period after the initial power increase, the first pre-distortion function stops being applied to the signal, and a second pre-distortion function is generated on the basis of a second set of DPD parameters and applied to the signal. Shortly before a subsequent discrete power increase is applied to the device, the first pre-distortion function is generated on the basis of the first set of DPD parameters and applied to the signal.Type: GrantFiled: November 22, 2010Date of Patent: August 15, 2017Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Spendim Dalipi, Stefan Hamrin, Tobias Johansson
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Patent number: 9584167Abstract: A wireless communication system including: a first communication device including: a processor configured to: compensate a distortion to a input signal based on a determined distortion compensation coefficient set, a amplifier configured to amplify the input signal to which the distortion is compensated, and a first antenna configured to: transmit the amplified signal to a second communication device, and receive a first feedback signal from the second communication device, the first feedback signal relating to an error that is detected in a received signal by the second communication device, the received signal corresponding to the transmitted signal, wherein a plurality of distortion compensation coefficient included in the determined distortion compensation coefficient set are adjusted based on the first feedback signal relating to the error that is detected in the received signal by the second communication device.Type: GrantFiled: June 19, 2015Date of Patent: February 28, 2017Assignee: FUJITSU LIMITEDInventors: Kazuyoshi Kakinuma, Takanori Iwamatsu
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Patent number: 9571154Abstract: Systems and methods are provided for removing interference from received signals. An interference control signal may be generated in a transceiver during transmission and reception of signals. The interference control signal may be generated based on a first interference control input corresponding to an input signal used in generating the transmitted signals, and a second interference control input corresponding to a model of a leakage of the transmitted signals onto the received signals. The model may be based on a first approximation of a transfer function for the leakage. The interference control signal may be combined with an intermediate signal generated during processing of the received signals, to generate a corresponding combined signal, and the combined signal may be applied during processing of the received signals.Type: GrantFiled: December 1, 2015Date of Patent: February 14, 2017Assignee: ENTROPIC COMMUNICATIONS, LLCInventors: Branislav Petrovic, Shachar Kons, Michail Tsatsanis
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Patent number: 9489008Abstract: A method and system for error logging that is independent of the clock frequency ratio in an I/O subsystem. In one embodiment of the invention, the I/O subsystem has an error logging mechanism with a fixed queue depth of two and is independent of the clock frequencies in the I/O subsystem. The I/O subsystem has two queue entries for storing or logging the uncorrectable errors. In one embodiment of the invention, the I/O subsystem has two queue entries for storing or logging the 128-bit TLP Header and the First Error Pointer (FEP) of the uncorrectable errors detected in the I/O subsystem.Type: GrantFiled: December 22, 2011Date of Patent: November 8, 2016Assignee: Intel CorporationInventors: Ming Yi Lim, Su Wei Lim, Poh Thiam Teoh
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Patent number: 9369191Abstract: Aspects described herein relate to selecting a rank for wireless communications using multiple transmit antenna layers. A first effective throughput achievable using a first rank and based at least in part on a first block error rate (BLER) associated with the first rank can be estimated along with a second effective throughput achievable using a second rank and based at least in part on a second BLER associated with the second rank. The first rank or second rank is selected to be used for transmitting communications over multiple transmit antenna layers based at least in part on comparing the first effective throughput to the second effective throughput, and the selection can be indicated to a transmitting entity from which the communications over the multiple transmit antenna layers are received.Type: GrantFiled: December 11, 2014Date of Patent: June 14, 2016Assignee: QUALCOMM IncorporatedInventors: Heechoon Lee, Feng Han, Sanaz Barghi, Sharad Deepak Sambhwani
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Patent number: 9331765Abstract: A method, system and device are provided for using an indexed list of linearly independent, predetermined vectors Vref={vref1,. . . , vrefM} and channel knowledge H, G from each transmitter to compute and feedback equivalent channel matrix information Hi,jeq to its affiliated transmitter based on the assigned/determined rank of the receiver. With this information, each transmitter selects Li receivers and constructs a transmitted signal by applying a selected precoding matrix to the mixed rank data, thereby eliminating interference to the rest of the receivers in the network.Type: GrantFiled: February 1, 2011Date of Patent: May 3, 2016Assignee: BlackBerry LimitedInventors: Amin Mobasher, Yongkang Jia
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Patent number: 9319896Abstract: A method of channel estimation enhancement is provided. In a wireless communications system, a transmitting device transmits a long preamble frame comprising a first training field, a signal field, and a second training field. The signal field has a beam-change indicator bit indicates whether there is beam change between the first training field and the second training field. A receiving device receives the long preamble frame, performs a first channel estimation based on the first training field, and performs a second channel estimation based on the second training field. If the beam-change indicator bit indicates negative beam change, then the receiving device performs channel estimation enhancement by combining the first channel estimation and the second channel estimation. As a result, channel estimation performance is improved.Type: GrantFiled: May 2, 2013Date of Patent: April 19, 2016Assignee: MEDIATEK Singapore Ple. Ltd.Inventors: Jianhan Liu, Thomas Edward Pare, Chao-Chun Wang, James June-Ming Wang, YungPing Hsu
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Patent number: 9276763Abstract: The communication apparatus intermittently carries out receiving operation during a predetermined reception period. The apparatus includes a wireless communication section for carrying out wireless communication, which includes a carrier sensor for sensing a carrier at the beginning of the communication, and a carrier sense switching section for using carrier sense levels different between packet transmission and reception to switch the carrier sense level of the carrier sensor according to the packet. Thus, the apparatus can use and flexibly adjust the optimum carrier sense level for the intermittent receiving operation within the reception period.Type: GrantFiled: May 29, 2009Date of Patent: March 1, 2016Assignee: OKI ELECTRIC INDUSTRY CO., LTD.Inventor: Yuki Kubo
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Patent number: 9232530Abstract: It is described a method for managing a radio transmission between a base station and a user equipment, wherein a communication channel is used for the radio transmission, wherein the communication channel includes a plurality of channel resources and is based on a MIMO transmission scheme. The method includes dividing the plurality of channel resources into a set of channel resource regions, assigning a MIMO rank to each channel resource region, wherein the MIMO rank is indicative for a number of channel resources to be used for a radio transmission within a corresponding channel resource region, selecting a channel resource region for the radio transmission between the base station and the user equipment, and managing the radio transmission between the base station and the user equipment based on the selected channel resource region and the corresponding assigned MIMO rank.Type: GrantFiled: December 20, 2011Date of Patent: January 5, 2016Assignee: Nokia Solutions and Networks OyInventors: Yuanye Wang, Klaus Ingemann Pedersen