Patents by Inventor Songping Wu
Songping Wu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11736227Abstract: Technologies directed to hash spreading to extend a wireless coverage are described. One method includes receiving input bits and control information that specifies a first data rate and a second modem scheme having a second signal range that is greater than a first signal range corresponding to a first modem scheme. The method generates a first sequence of bits by scrambling the input bits, the first sequence of bits having a first number of bits. The method generates a second sequence of bits by hash spreading the first sequence of bits using a set of spreading codes. The second sequence of bits has a second number of bits greater than the first number of bits. The method generates first symbols by modulating the second sequence, converts the first symbols into radio frequency (RF) signals, and sends the RF signals to the second wireless device.Type: GrantFiled: September 14, 2021Date of Patent: August 22, 2023Assignee: Amazon Technologies, Inc.Inventors: Songping Wu, Tianxiang Zhou, Qian Liu, Ming-Wei Liu
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Patent number: 11706716Abstract: Technologies directed to improving power for wireless transceivers are described. One method determines, in a first mode, a first value associated with a wireless link and a second values associated with the wireless link, the first value being indicative of a first metric and the second value being indicative of a second metric different from the first metric. The first value and the second value collectively indicate a category of channel quality for the wireless link. The method determines that the wireless device can operate in a second mode for subsequent data based on the category of channel quality, wherein in the second mode the wireless device consumes less power than in the first power mode. The method receives, in the second mode, second data over the wireless link.Type: GrantFiled: July 12, 2021Date of Patent: July 18, 2023Assignee: Amazon Technologies, Inc.Inventors: Songping Wu, Sai Prashanth Chinnapalli
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Patent number: 11329414Abstract: The present disclosure describes aspects of a conductive receptacle collar for desense mitigation. In aspects, an apparatus comprises a printed circuit board assembly (PCBA) that includes an integrated circuit with signal lines for a wired data interface. The apparatus also includes a coupling component with a receptacle for the wired data interface and an enclosure in which the PCBA is mounted. The enclosure has an opening through which the receptacle for the wired data interface is exposed. A conductive collar is disposed between an exterior surface of the receptacle and an interior surface of this opening. The conductive collar contacts the receptacle's exterior surface and the interior surface of the opening to electrically couple these respective surfaces. By so doing, the conductive collar improves grounding of the receptacle to the enclosure, which may mitigate the desense of the apparatus's wireless receivers caused by operation of the wired data interface.Type: GrantFiled: September 9, 2020Date of Patent: May 10, 2022Assignee: Google LLCInventors: Yichi Zhang, Songping Wu, Shuai Jin, Huan Liao, Zhiping Yang
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Patent number: 11284360Abstract: Technologies directed to improving power for wireless transceivers are described. One method processes, in a first power mode, a first portion of a data packet, the first portion being modulated with a FSK modulation. The method determines a first gain value for an amplifier and determines that the first data packet has a second portion that is modulated with a PSK modulation. The method determines a receive signal strength indicator (RSSI) value associated with the first portion and determines that the RSSI does not exceed a threshold value corresponding to a throughput requirement. The method switches to a second power mode, the second power mode being higher in power than the first power mode. The method determines, in the second power mode, a second gain value for the amplifier and process the second portion of the first data packet. The second gain value is determined before the processing the second portion.Type: GrantFiled: January 16, 2020Date of Patent: March 22, 2022Assignee: Amazon Technologies, Inc.Inventors: Songping Wu, Sai Prashanth Chinnapalli
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Publication number: 20220077617Abstract: The present disclosure describes aspects of a conductive receptacle collar for desense mitigation. In aspects, an apparatus comprises a printed circuit board assembly (PCBA) that includes an integrated circuit with signal lines for a wired data interface. The apparatus also includes a coupling component with a receptacle for the wired data interface and an enclosure in which the PCBA is mounted. The enclosure has an opening through which the receptacle for the wired data interface is exposed. A conductive collar is disposed between an exterior surface of the receptacle and an interior surface of this opening. The conductive collar contacts the receptacle's exterior surface and the interior surface of the opening to electrically couple these respective surfaces. By so doing, the conductive collar improves grounding of the receptacle to the enclosure, which may mitigate the desense of the apparatus's wireless receivers caused by operation of the wired data interface.Type: ApplicationFiled: September 9, 2020Publication date: March 10, 2022Applicant: Google LLCInventors: Yichi Zhang, Songping Wu, Shuai Jin, Huan Liao, Zhiping Yang
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Patent number: 11082270Abstract: Technologies directed to improving signal quality in received wireless signals in the phase domain of shift keying demodulation are described. One method receives digital data, the digital data including a systematic error as a linear function of residual carrier frequency offset and phase noise (PN). The method extracts first phase data from the digital data, determines, in a phase domain, an estimate of the systematic error using historical phase error data of additional digital data received prior to the digital data, and generate second phase data by subtracting the estimate from the first phase data. The method determines a set of symbols from the second phase data and generates a bit sequence of a data packet from the set of symbols.Type: GrantFiled: January 16, 2020Date of Patent: August 3, 2021Assignee: Amazon Technologies, Inc.Inventors: Songping Wu, Sai Prashanth Chinnapalli
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Patent number: 11071064Abstract: Technologies directed to improving power for wireless transceivers are described. One method receives, in a low power mode, a data packet over a wireless link and determines a RSSI value and a receive signal quality indicator (RSQI) value. The method stores a record with the RSSI and RSQI values in memory. The method determines an average RSSI value and an average RSQI value from historical RSSI and RSQI values, respectively, stored in records. The method categorizes received data in a first channel quality indicator (CQI) category using the average RSSI value and the average RSQI value and configures the wireless device to operate in another power mode, responsive to the data being in the first CQI. The method processes a subsequent data packet while in the other power mode. In some cases, the other power mode is less than a maximum power mode specified by a wireless standard.Type: GrantFiled: January 16, 2020Date of Patent: July 20, 2021Assignee: Amazon Technologies, Inc.Inventors: Songping Wu, Sai Prashanth Chinnapalli
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Publication number: 20200350733Abstract: An electrical connector can include a tongue, a shell, multiple pins, and a shield. The shell can enclose the tongue, and can define an aperture for receiving a plug. The multiple pins can extend along the tongue. The multiple pins can extend beyond the shell a first distance from a back portion of the shell. The back portion of the shell can be opposite from the aperture. The shield can extend from a back portion of the shell. The shield can include a first arm extending away from the back portion of the shell a second distance and a second arm extending from the first arm. The second distance can be greater than the first distance.Type: ApplicationFiled: May 1, 2019Publication date: November 5, 2020Inventors: Zhiping Yang, Songping Wu, Jordan Kestler, Huan Liao
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Patent number: 10560140Abstract: A MIMO wireless transceiver includes: antennas, components forming transmit and receive chains coupled to the antennas, a signal combiner, and a predistortion calibration circuit. The transmit chain components include: pre-distorter circuits and power amplifiers (PA)s, The pre-distorter circuits each couple to a transmit chain for pre-distorting an associated signal thereon. The PAs are input coupled to a corresponding transmit chain and output coupled to a corresponding antenna. The signal combiner combines the amplified signals from all of the PAs into a combined output signal.Type: GrantFiled: November 29, 2017Date of Patent: February 11, 2020Assignee: QUANTENNA COMMUNICATIONS, INC.Inventors: Songping Wu, Hossein Dehghan, Abhishek Kumar Agrawal
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Patent number: 10212019Abstract: A communication device determines an estimate of a communication channel, and determines, based on the estimate of the communication channel, a plurality of pairs of modulation schemes and encoding schemes to be used for a packet, including: i) determining, for a first set of adjacent orthogonal frequency division multiplexing (OFDM) subcarriers, a first pair of a modulation scheme and an encoding scheme; and ii) determining, for a second set of adjacent OFDM subcarriers, a second pair of a modulation scheme and an encoding scheme, the second pair being different than the first pair. The communication device generates the packet for transmission, wherein i) all data modulated on the first set of adjacent OFDM subcarriers is modulated and encoded using the first pair, and ii) all data modulated on the second set of adjacent OFDM subcarriers is modulated and encoded using the second pair.Type: GrantFiled: August 27, 2018Date of Patent: February 19, 2019Assignee: Marvell International Ltd.Inventors: Hongyuan Zhang, Hui-Ling Lou, Songping Wu
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Patent number: 10063402Abstract: A communication device determines an estimate of a communication channel, and determines, based on the estimate of the communication channel, a plurality of bit rates to be used for a data unit, including: determining a first bit rate for a first set of one or more orthogonal frequency division multiplexing (OFDM) subcarriers, and determining a second bit rate for a second set of one or more OFDM subcarriers, the second bit rate being different than the first bit rate. The communication device generates the data unit for transmission, wherein i) all data modulated on the first set of one or more OFDM subcarriers corresponds to the first bit rate and ii) all data modulated on the second set of one or more OFDM subcarriers corresponds to the second bit rate.Type: GrantFiled: March 6, 2017Date of Patent: August 28, 2018Assignee: Marvell International Ltd.Inventors: Hongyuan Zhang, Hui-Ling Lou, Songping Wu
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Patent number: 10002101Abstract: Methods and apparatus for equalization of a high speed serial bus. A well-tuned passive equalization circuit for use with high frequency differential signals suffer from e.g., impedance mismatches, impedance discontinuities (e.g., connectors, etc.). In one embodiment, a shunting circuit is inserted between the differential terminals of a Universal Serial Bus (USB) cable, connector, etc. The shunting circuit is configured to “open” at low frequencies to enable Full Speed (FS) enumeration, while also providing sufficiently high impedance at high frequencies to enable High Speed (HS) operation. In one such implementation, the shunting circuit includes a tuned resistor, capacitor, inductor, and switch element arranged in series.Type: GrantFiled: March 6, 2015Date of Patent: June 19, 2018Assignee: APPLE INC.Inventors: Songping Wu, Zhiping Yang, Kirill Kalinichev, Greg Nayman, Georgi Beloev
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Patent number: 9991941Abstract: A plurality of received signals are received at a first communication device, the plurality of received signals corresponding to at least one training signal having been transmitted by a second communication device a plurality of times via a plurality of antennas by the second communication device applying a respective antenna weight vector from a plurality of different antenna weight vectors each time the at least one training signal is transmitted. The first communication device generates a transmitter antenna weight vector based on a mathematical combination of at least i) the plurality of received signals, ii) the antenna weight vectors applied by the second communication device when transmitting the at least one training signal the plurality of times, and iii) the at least one training signal. The first communication device transmits the transmitter antenna weight vector to the second communication device.Type: GrantFiled: August 4, 2014Date of Patent: June 5, 2018Assignee: Marvell International Ltd.Inventors: Songping Wu, Manyuan Shen, Quan Zhou, Hongyuan Zhang, Hui-Ling Lou
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Patent number: 9690425Abstract: System and methods are provided for tracking baseline signals for touch detection. The system includes: a comparison network configured to determine whether an input baseline signal is within a tracking range; a filter network configured to generate an output baseline signal for touch detection based at least in part on the input baseline signal according to one or more filter parameters; and a signal processing component configured to update the one or more filter parameters based at least in part on the determination of whether the input baseline signal is within the tracking range.Type: GrantFiled: February 23, 2015Date of Patent: June 27, 2017Assignee: MARVEL WORLD TRADE LTD.Inventors: Kanke Gao, Bike Xie, Songping Wu
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Patent number: 9590832Abstract: Methods an apparatus for performing sub-carrier adaptation in multi-carrier communication systems. In one embodiment, a method includes receiving, via a reverse communication channel, a first data unit via multiple subcarriers. The method further includes determining an estimate of a forward communication channel based on the received first data unit. The method further includes determining different bit rates for the multiple subcarriers based on the estimate of the forward channel. The method further includes transmitting a second data unit via the multiple subcarriers, where bits in the second data unit are allocated across the multiple subcarriers based on the determined bit rates for the multiple subcarriers.Type: GrantFiled: September 2, 2009Date of Patent: March 7, 2017Assignee: Marvell International Ltd.Inventors: Hongyuan Zhang, Hui-Ling Lou, Songping Wu
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Patent number: 9584255Abstract: A first network device including a medium access control module and a physical layer module. The medium access control module is configured to generate a frame to include a first header, a second header and a payload. The first header indicates a start of the frame for a second network device. The second header indicates a length of the payload for the second network device. The payload comprises a third header and data. Other than the payload, a format of the frame complies with IEEE 802.15.4. The physical layer module is configured to: receive the frame; repetition code the third header or repetition code the data; generate a signal including (i) the first header, (ii) the second header, and (iii) the repetition coded third header or the repetition coded data; modulate the signal; and transmit the modulated signal to the second network device.Type: GrantFiled: December 1, 2014Date of Patent: February 28, 2017Assignee: Marvell International Ltd.Inventor: Songping Wu
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Patent number: 9525759Abstract: In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, wherein the first format includes a short training field (STF) spread with a first spread code, a physical layer (PHY) data unit that conforms to a second format and is for transmitting PHY control information is generated. Generating the PHY data unit includes generating a first portion of the PHY data unit to indicate the PHY data unit conforms to the second format, wherein the first portion of the PHY data unit includes an STF spread with a second spread code different than the first spread code. A second portion of the PHY data unit is generated according to the second format, wherein the second portion of the PHY data unit omits header fields specified by the first format.Type: GrantFiled: July 7, 2014Date of Patent: December 20, 2016Assignee: Marvell World Trade Ltd.Inventors: Hongyuan Zhang, Songping Wu, Hui-Ling Lou, Rohit U. Nabar
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Patent number: 9450848Abstract: A first network device including modulation, transmit, front end, and phase modules. The modulation module amplitude or frequency modulates a data signal to generate a modulated signal. The transmit module transmits an output signal based on the modulated signal. The front end module obtains a phase of a point in a first cluster of index ratios. Each of the index ratios corresponds to a respective phase of a respective symbol period of the output signal. Each of the index ratios is based on a maximum amplitude, a minimum amplitude or a mean of amplitudes of the output signal over the symbol periods. The amplitudes for each of the means includes a corresponding one of the maximum amplitudes and a corresponding one of the minimum amplitudes. The phase module adjusts a phase of the output signal based on the phase of the point in the first cluster of index ratios.Type: GrantFiled: August 12, 2015Date of Patent: September 20, 2016Assignee: Marvell International Ltd.Inventor: Songping Wu
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Publication number: 20160267044Abstract: Methods and apparatus for equalization of a high speed serial bus. Various aspects of the present disclosure are directed to a well-tuned passive equalization circuit for use with high frequency differential signals that suffer from e.g., impedance mismatches, impedance discontinuities (e.g., connectors, etc.). In one embodiment, a shunting circuit is inserted between the differential terminals of a Universal Serial Bus (USB) cable, connector, etc. The shunting circuit is configured to “open” at low frequencies to enable Full Speed (FS) enumeration, while also providing sufficiently high impedance at high frequencies to enable High Speed (HS) operation. In one such implementation, the shunting circuit includes a tuned resistor, capacitor, inductor, and switch element arranged in series.Type: ApplicationFiled: March 6, 2015Publication date: September 15, 2016Inventors: Songping WU, Zhiping YANG, Kirill KALINICHEV, Greg NAYMAN, Georgi Beloev
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Patent number: 9420594Abstract: Methods and apparatus are provided for adaptively selecting a communications mode in high frequency systems. A first dual-mode device having capabilities of using two or more high frequency communications modes, such as OFDM and SC modulation, may transmit a signal to a second dual-mode device with the same capabilities. The second dual-mode device may compute a channel characteristic associated with a high frequency communications channel and select an optimal high frequency communications mode. The second dual-mode device may transmit information indicative of the channel characteristic or the selected communications mode to the first dual-mode device. The first dual-mode device may select and operate using the optimal high frequency communications mode based on the information received from the second dual-mode device. The first and second dual-mode devices may communicate using the selected high frequency communications mode.Type: GrantFiled: November 21, 2014Date of Patent: August 16, 2016Assignee: Marvell International Ltd.Inventors: Rohit U. Nabar, Hongyuan Zhang, Arul Durai Murugan Palanivelu, Hui-Ling Lou, Songping Wu