Patents by Inventor Ba-Zhong Shen

Ba-Zhong Shen 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).

  • Publication number: 20200044773
    Abstract: A system to implement a communication line coding scheme using a non-complex bit-to-symbol mapping, a forward error correction (FEC) coding, and an additive bit scrambler after the FEC at the PHY layer is provided. The system may be a part of or implemented by an automobile component. The system may be a PHY device configured to convert data from the MAC layer into 2D-PAM3 symbols that are transmitted across a communication link at a predetermined transmission rate, such as to be compliant with a communication standard. The PHY device may select characteristics of the conversion, such as the FEC coded symbol, based on the target transmission rate. The PHY device may include a transceiver, and may convert the data from MAC layer to PHY layer and back.
    Type: Application
    Filed: October 14, 2019
    Publication date: February 6, 2020
    Inventors: Ba-Zhong SHEN, Ahmad CHINI, Chung Ming TU, Mehmet Vakif TAZEBAY
  • Patent number: 10554333
    Abstract: A system to implement a communication line coding scheme using a non-complex bit-to-symbol mapping, a forward error correction (FEC) coding, and an additive bit scrambler after the FEC at the PHY layer is provided. The system may be a part of or implemented by an automobile component. The system may be a PHY device configured to convert data from the MAC layer into 2D-PAM3 symbols that are transmitted across a communication link at a predetermined transmission rate, such as to be compliant with a communication standard. The PHY device may select characteristics of the conversion, such as the FEC coded symbol, based on the target transmission rate. The PHY device may include a transceiver, and may convert the data from MAC layer to PHY layer and back.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: February 4, 2020
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Ba-Zhong Shen, Ahmad Chini, Chung Ming Tu, Mehmet Vakif Tazebay
  • Patent number: 10447431
    Abstract: A system to implement a communication line coding scheme using a non-complex bit-to-symbol mapping, a forward error correction (FEC) coding, and an additive bit scrambler after the FEC at the PHY layer is provided. The system may be a part of or implemented by an automobile component. The system may be a PHY device configured to convert data from the MAC layer into 2D-PAM3 symbols that are transmitted across a communication link at a predetermined transmission rate, such as to be compliant with a communication standard. The PHY device may select characteristics of the conversion, such as the FEC coded symbol, based on the target transmission rate. The PHY device may include a transceiver, and may convert the data from MAC layer to PHY layer and back.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: October 15, 2019
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Ba-Zhong Shen, Ahmad Chini, Chung Ming Tu, Mehmet Vakif Tazebay
  • Patent number: 10313054
    Abstract: A communication device (alternatively, device) includes a processor configured to support communications with other communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other communication device(s) and to generate and process signals for such communications. In some examples, a device encodes information using a low density parity check (LDPC) code to generate an LDPC coded signal and transmits the LDPC coded signal to another communication device. in other examples, a device receives an LDPC coded signal from another communication device and decodes the LDPC coded signal using an LDPC matrix. The LDPC matrix includes a left hand side matrix and a right hand side matrix (e.g., having CSI (Cyclic Shifted Identity) sub-matrices on a main diagonal and another diagonal adjacently located to the main diagonal).
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: June 4, 2019
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Ba-Zhong Shen, Matthias Korb, Andrew John Blanksby, Ron Porat
  • Publication number: 20180316540
    Abstract: In some aspects, the disclosure is directed to methods and systems for receive-side distortion cancellation in orthogonal frequency division multiplexing (OFDM). Each of a plurality of OFDM receivers generates a distortion signal; modulates, amplifies, and demodulates the distortion signal; and then mixes a received signal with an inverse of the demodulated distortion signal, along with demodulated distortion signals provided by each other receiver. The resulting output signal may be de-mapped and decoded, with amplifier distortion reduced.
    Type: Application
    Filed: April 24, 2018
    Publication date: November 1, 2018
    Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Ba-Zhong SHEN
  • Publication number: 20180041304
    Abstract: A system to implement a communication line coding scheme using a non-complex bit-to-symbol mapping, a forward error correction (FEC) coding, and an additive bit scrambler after the FEC at the PHY layer is provided. The system may be a part of or implemented by an automobile component. The system may be a PHY device configured to convert data from the MAC layer into 2D-PAM3 symbols that are transmitted across a communication link at a predetermined transmission rate, such as to be compliant with a communication standard. The PHY device may select characteristics of the conversion, such as the FEC coded symbol, based on the target transmission rate. The PHY device may include a transceiver, and may convert the data from MAC layer to PHY layer and back.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 8, 2018
    Inventors: Ba-Zhong SHEN, Ahmad CHINI, Chung Ming TU, Mehmet Vakif TAZEBAY
  • Publication number: 20180041303
    Abstract: A system to implement a communication line coding scheme using a non-complex bit-to-symbol mapping, a forward error correction (FEC) coding, and an additive bit scrambler after the FEC at the PHY layer is provided. The system may be a part of or implemented by an automobile component. The system may be a PHY device configured to convert data from the MAC layer into 2D-PAM3 symbols that are transmitted across a communication link at a predetermined transmission rate, such as to be compliant with a communication standard. The PHY device may select characteristics of the conversion, such as the FEC coded symbol, based on the target transmission rate. The PHY device may include a transceiver, and may convert the data from MAC layer to PHY layer and back.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 8, 2018
    Inventors: Ba-Zhong SHEN, Ahmad CHINI, Chung Ming TU, Mehmet Vakif TAZEBAY
  • Patent number: 9826373
    Abstract: A wireless local area network (WLAN) transmitter includes a baseband processing module and a plurality of radio frequency (RF) transmitters. The processing module selects one of a plurality of modes of operation based on a mode selection signal. The processing module determines a number of transmit streams based on the mode selection signal. The processing of the data further continues by converting encoded data into streams of symbols in accordance with the number of transmit streams and the mode selection signal. A number of the plurality of RF transmitters are enabled based on the mode selection signal to convert a corresponding one of the streams of symbols into a corresponding RF signal such that a corresponding number of RF signals is produced.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: November 21, 2017
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, Nambirajan Seshadri, Kelly Brian Cameron, Hau Thien Tran, Ba-Zhong Shen
  • Patent number: 9819444
    Abstract: A system to implement a communication line coding scheme using a non-complex bit-to-symbol mapping, a forward error correction (FEC) coding, and an additive bit scrambler after the FEC at the PHY layer is provided. The system may be a part of or implemented by an automobile component. The system may be a PHY device configured to convert data from the MAC layer into 2D-PAM3 symbols that are transmitted across a communication link at a predetermined transmission rate, such as to be compliant with a communication standard. The PHY device may select characteristics of the conversion, such as the FEC coded symbol, based on the target transmission rate. The PHY device may include a transceiver, and may convert the data from MAC layer to PHY layer and back.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: November 14, 2017
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.
    Inventors: Ba-Zhong Shen, Ahmad Chini, Chung Ming Tu, Mehmet Vakif Tazebay
  • Patent number: 9692451
    Abstract: A communication device (alternatively, device) includes a processor configured to support communications with other communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other communication device(s) and to generate and process signals for such communications. The device receives a non-binary low density parity check (NB-LDPC) coded signal. The device then decodes the NB-LDPC coded signal using a NB-LDPC matrix to generate estimates of information bits encoded therein. The NB-LDPC matrix is characterized by a base proto-matrix having elements that represent sub-matrices, and the elements are selected from a finite Galois field that includes symbols.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: June 27, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd
    Inventors: Sudarsan Vasista Srinivasan Ranganathan, Ba-Zhong Shen
  • Patent number: 9693064
    Abstract: Within a device, one or more subsets associated with one or more frames or pictures of the video signal may be adaptively selected and used for motion vector calculation (e.g., such as in accordance with inter-prediction). For example, a picture or frame of the video signal may be partitioned into a number of respective regions. Any one or more, but typically fewer than all, of the respective regions of that picture or frame may be appropriately selected, and stored, based on any one or more considerations for use in motion vector calculation (e.g., inter-prediction). A sub-sampled or down-sampled picture or frame [or alternatively, a sub-sampled or down-sampled version of one or more respective regions of a picture or frame] (e.g., the sub-sampling or down-sampling ratio which may be adaptively determined based on any one or more considerations) may be stored for use in motion vector calculation (e.g., inter-prediction).
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: June 27, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd
    Inventors: Ba-Zhong Shen, Wade K. Wan, Brian Heng, Zhijie Yang
  • Patent number: 9660668
    Abstract: A local area network (LAN) backbone is implemented within an environment such as a self-contained environment (e.g., an automobile, an aircraft, a train, a ship, and/or any other environment). The LAN backbone is affected by AWGN, NBI, and/or impulse noise (noise). The LAN backbone supports communications based on an Ethernet communication protocol (e.g., a 1000Base-T1 based system that includes at least one single twisted pair). A device receives a first LDPC coded signal via the LAN backbone and decodes it to recover an input signal of a control system. The device also uses soft information generated during the decoding to compensate for the noise affecting the LAN backbone and then processes the input signal to generate a control signal for the control system. The device then and encodes the control signal to generate a second LDPC coded signal and transmits the second LDPC coded signal via the LAN backbone.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: May 23, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd
    Inventors: Ba-Zhong Shen, Mehmet Vakif Tazebay, William Gene Bliss, Ahmad Chini, Mehdi Tavassoli Kilani
  • Patent number: 9577787
    Abstract: A communication technique for energy efficient Ethernet (EEE) employs a systematic block forward error correcting code (FEC). The technique aligns a low power idle (LPI) refresh signal with the FEC frame. The refresh signal includes a known reference sequence, FEC systematic symbols, and FEC parity symbols. The technique may apply shortened FEC encoding and decoding on the partial data symbols and the parity symbols.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: February 21, 2017
    Assignee: BROADCOM CORPORATION
    Inventors: Chung Ming Tu, James Graba, Peiqing Wang, Ahmad Chini, Yencheng Chen, Ba-Zhong Shen, Mehmet Vakif Tazebay
  • Patent number: 9553743
    Abstract: A communication device (alternatively, device) includes a processor configured to support communications with other communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other communication device(s) and to generate and process signals for such communications. For example, the device's processor receives one or more signals from a communication channel. The processor then processes the one or more signals to generate 2D DFE soft slicer outputs and to decode the one or more signals based on the 2D DFE soft slicer outputs to generate estimates of information encoded within the one or more signals. The processor may process the 2D DFE soft slicer outputs to generate 2D DFE hard decisions and then generates other estimates of the information encoded based on the 2D DFE hard decisions.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: January 24, 2017
    Assignee: BROADCOM CORPORATION
    Inventors: Ba-Zhong Shen, Mehmet Vakif Tazebay, Chung Ming Tu
  • Patent number: 9503303
    Abstract: The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: November 22, 2016
    Assignee: BROADCOM CORPORATION
    Inventors: Tak K. Lee, Ba-Zhong Shen, Kelly Brian Cameron, Hau Thien Tran
  • Patent number: 9432143
    Abstract: A communication device is configured to communicate coded information to other communication device(s). The communication device uses NCPs to indicate locations of codewords within signal(s) transmitted to the other communication device(s). The communication device is configured to encode NCP(s) using an FEC code to generate coded NCP(s) and also to encode the NCP(s) using a cyclic redundancy check (CRC) code to generate NCP CRC bits. The communication device is also configured to encode the NCP CRC bits using the FEC code to generate coded NCP CRC bits. The communication device is then configured to generate OFDM or OFDMA symbol(s) include the coded NCP(s) and the coded NCP CRC bits to indicate beginnings of codeword(s) within at least one of the OFDM symbol(s) and/or additional OFDM symbol(s). The communication device is also configured to transmit the OFDM or OFDMA symbols to another communication device via a communication interface of the communication device.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: August 30, 2016
    Assignee: Broadcom Corporation
    Inventors: Niki Roberta Pantelias, Ba-Zhong Shen, Tak Kwan Lee, Avraham Kliger, Richard Stephen Prodan
  • Patent number: 9432700
    Abstract: Adaptive loop filtering in accordance with video coding. An adaptive loop filter (ALF) and/or other in-loop filters (e.g., sample adaptive offset (SAO) filter, etc.) may be implemented within various video coding architectures (e.g., encoding and/or decoding architectures) to perform both offset and scaling processing, only scaling processing, and/or only offset processing. Operation of such an ALF may be selective in accordance with any of multiple respective operational modes at any given time and may be adaptive based upon various consideration(s) (e.g., desired complexity level, processing type, local and/or remote operational conditions, etc.). For example, an ALF may be applied to a decoded picture before it is stored in a picture buffer (or digital teacher buffer (DPB)). An ALF can provide for coding noise reduction of a decoded picture, and the filtering operations performed thereby may be selective (e.g., on a slice by slice basis, block by block basis, etc.).
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: August 30, 2016
    Assignee: BROADCOM CORPORATION
    Inventors: Peisong Chen, Ba-Zhong Shen, Wade K. Wan
  • Publication number: 20160211941
    Abstract: A communication device (alternatively, device) includes a processor configured to support communications with other communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other communication device(s) and to generate and process signals for such communications. In some examples, a device encodes information using a low density parity check (LDPC) code to generate an LDPC coded signal and transmits the LDPC coded signal to another communication device. in other examples, a device receives an LDPC coded signal from another communication device and decodes the LDPC coded signal using an LDPC matrix. The LDPC matrix includes a left hand side matrix and a right hand side matrix (e.g., having CSI (Cyclic Shifted Identity) sub-matrices on a main diagonal and another diagonal adjacently located to the main diagonal).
    Type: Application
    Filed: December 28, 2015
    Publication date: July 21, 2016
    Applicant: BROADCOM CORPORATION
    Inventors: Ba-Zhong Shen, Matthias Korb, Andrew John Blanksby, Ron Porat
  • Publication number: 20160204900
    Abstract: A communication technique for energy efficient Ethernet (EEE) employs a systematic block forward error correcting code (FEC). The technique aligns a low power idle (LPI) refresh signal with the FEC frame. The refresh signal includes a known reference sequence, FEC systematic symbols, and FEC parity symbols. The technique may apply shortened FEC encoding and decoding on the partial data symbols and the parity symbols.
    Type: Application
    Filed: February 20, 2015
    Publication date: July 14, 2016
    Inventors: Chung Ming Tu, James Graba, Peiqing Wang, Ahmad Chini, Yencheng Chen, Ba-Zhong Shen, Mehmet Vakif Tazebay
  • Patent number: 9379848
    Abstract: A communication device (device) includes a processor configured to generate an initial ranging LDPC coded signal based on a first LDPC code and then transmits the initial ranging LDPC coded signal to another device (e.g., via a communication interface) for use by the other device for coarse power and timing adjustment. Then, the processor processes a received transmit opportunity signal to identify a transmit opportunity time period. The processor then generates a fine ranging LDPC coded signal based on a second LDPC code and transmits the fine ranging LDPC coded signal to the other device during the transmit opportunity time period for use by the other device for fine power and timing adjustment. In some instances, the processor may be configured to generate one or more wideband probe signals for transmission to the other device in conjunction with or instead of the fine ranging LDPC coded signals.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: June 28, 2016
    Assignee: BROADCOM CORPORATION
    Inventors: Avraham Kliger, Ba-Zhong Shen