Patents by Inventor Vahid Tarokh

Vahid Tarokh 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).

  • SYSTEM AND METHOD OF DETECTION OF A MODE OF MOTION
    Publication number: 20140094940
    Abstract: A method includes processing sensor data received from one or more sensors based on the one or more signatures to produce processed data and determining a mode of motion associated with a movement of a user based on the processed data.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Inventors: Saeed S. Ghassemzadeh, Lusheng Ji, Robert Raymond Miller, II, Behtash Babadi, Vahid Tarokh
  • Systems and Methods for Downlink Power Control and Scheduling in a Wireless Network
    Publication number: 20140073369
    Abstract: Methods and systems for providing joint power control (PC) and scheduling in a wireless network are provided. In one example, a method includes generating a near-optimal power pattern for PC and scheduling in accordance with long term channel statistics. The near-optimal PC solution may be generated by first generating a set of possible power patterns in accordance with likely scheduling scenarios, then statistically narrowing the set of possible power patterns to identify the most commonly used power patterns, and finally selecting one of the most commonly used power patterns as the near-optimal power pattern. In another example, a table of optimal PC solutions are provided for performing distributed PC and scheduling in an adaptive and/or dynamic manner.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 13, 2014
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Gamini Senarath, Hang Zhang, Ho-Ting Cheng, Vahid Tarokh
  • APPARATUS AND METHOD USING MATRIX NETWORK CODING
    Publication number: 20140075270
    Abstract: Provided are a communication apparatus and method using a matrix network coding scheme. The communication apparatus includes a reception unit to receive a corrupted packet including a plurality of corrupted words, and a controller to estimate a first decoded word corresponding to the corrupted words based on the corrupted words and a generator matrix. The controller generates a second decoded word corresponding to the corrupted words based on a codebook and the estimated first decoded word. The codebook is based on the generator matrix. The controller generates a message based on a plurality of second decoded words respectively corresponding to the plurality of corrupted words.
    Type: Application
    Filed: November 19, 2013
    Publication date: March 13, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kwang Taik KIM, Chan Soo HWANG, Vahid TAROKH
  • Apparatus and method using matrix network coding
    Patent number: 8612833
    Abstract: Provided are a communication apparatus and method using a matrix network coding scheme. The communication apparatus includes a reception unit to receive a corrupted packet including a plurality of corrupted words, and a controller to estimate a first decoded word corresponding to the corrupted words based on the corrupted words and a generator matrix. The controller generates a second decoded word corresponding to the corrupted words based on a codebook and the estimated first decoded word. The codebook is based on the generator matrix. The controller generates a message based on a plurality of second decoded words respectively corresponding to the plurality of corrupted words.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: December 17, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang Taik Kim, Chan Soo Hwang, Vahid Tarokh
  • METHOD AND APPARATUS FOR DATA TRANSMISSION USING MULTIPLE TRANSMIT ANTENNAS
    Publication number: 20130243126
    Abstract: A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MSLE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.
    Type: Application
    Filed: February 25, 2013
    Publication date: September 19, 2013
    Applicant: AT&T Corp.
    Inventors: Arthur Robert Calderbank, Ayman F. Naguib, Nambirajan Seshadri, Vahid Tarokh
  • LOW COMPLEXITY MAXIMUM LIKELIHOOD DETECTION OF CONCATENATED SPACE CODES FOR WIRELESS APPLICATIONS
    Publication number: 20130089162
    Abstract: Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.
    Type: Application
    Filed: November 30, 2012
    Publication date: April 11, 2013
    Inventors: Siavash Alamouti, Patrick Poon, Vahid Tarokh
  • Directed wireless communication
    Patent number: 8412106
    Abstract: In an implementation of directed wireless communication, a multi-beam directed signal system coordinates directed wireless communication with client devices. A transmit beam-forming network routes data communication transmissions to the client devices via directed communication beams that are emanated from an antenna assembly, and a receive beam-forming network receives data communication receptions from the client devices via the directed communication beams.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: April 2, 2013
    Assignee: XR Communications, LLC
    Inventors: Marcus da Silva, William J. Crilly, Jr., James Brennan, Robert J. Conley, Siavash Alamouti, Eduardo Casas, Hujun Yin, Bobby Jose, Yang-Seok Choi, Vahid Tarokh, Praveen Mehrotra
  • COMMUNICATION METHOD OF RELAY NODE USING NON-LINEAR HYBRID NETWORK CODING AND DEVICE USING SAID METHOD
    Publication number: 20130070813
    Abstract: Provided is a relay node that performs network coding with respect to signals transmitted from a plurality of sources. The relay node may partition a plurality of constellation points into a plurality of subsets, generate a new constellation diagram based on respective characteristics among the plurality of subsets, and perform network coding based on the new constellation diagram.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 21, 2013
    Inventors: Kwang Taik KIM, Vahid TAROKH
  • Method and apparatus for data transmission using multiple transmit antennas
    Patent number: 8386898
    Abstract: A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MLSE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: February 26, 2013
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Arthur Robert Calderbank, Ayman F. Naguib, Nambirajan Seshadri, Vahid Tarokh
  • Diversity technique for wireless communications
    Patent number: 8355475
    Abstract: A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter utilizes space diversity and either time or frequency diversity.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: January 15, 2013
    Assignee: AT&T Mobility II LLC
    Inventors: Siavash Alamouti, Vahid Tarokh
  • Low complexity maximum likelihood detection of concatenated space codes for wireless applications
    Patent number: 8351545
    Abstract: Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: January 8, 2013
    Assignee: AT&T Mobility II LLC
    Inventors: Siavash Alamouti, Patrick Poon, Vahid Tarokh
  • Method and apparatus for data transmission using multiple transmit antennas
    Patent number: 8352845
    Abstract: A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MSLE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: January 8, 2013
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Arthur Robert Calderbank, Ayman F. Naguib, Nambirajan Seshadri, Vahid Tarokh
  • METHOD AND APPARATUS OF PHYSICAL LAYER NETWORK CODING
    Publication number: 20120207193
    Abstract: Provided is a physical layer network coding method and apparatus. A relay node determines reliabilities of symbols of nodes, based on a signal received from the plurality of nodes, and generates a transmission signal that maintains reliabilities of symbols that have high reliabilities and excludes components of symbols that have low reliabilities. The relay node generates the transmission signal that reduces an expected power of error, based on the received signal.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 16, 2012
    Inventors: Kwang Taik Kim, Vahid Tarokh
  • Method for performing soft decision decoding of Euclidean space Reed-Muller codes
    Patent number: 8245116
    Abstract: Soft decision decoding of a codeword of a Reed-Muller (RM) code by selecting an optimal decomposition variable i using a likelihood calculation. A code RM(r, m) is expressed as {(u, uv)|u?RM(r, m?1) and v?RM(r?1, m?1)}, where uv denotes a component-wise multiplication of u and v, and (u, uv)=(r1, r2). A receive codeword is separated into r1=u and r2=uv based on the optimal decomposition variable, and r2 is decoded according to the optimal decomposition variable, using a RM(r?1, m?1) decoder to obtain a decoded v and a first set of decoded bits. The decoded v is combined with r1 using (r1+r2v)/2, and (r1+r2v)/2 is decoded using a RM(r, m?1) decoder to obtain a decoded u and a second set of decoded bits.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: August 14, 2012
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Philip Orlik, Raymond Yim, Kieran Parsons, Vahid Tarokh, Jinyun Zhang
  • Apparatus and method for interference cancellation in multi-antenna system
    Patent number: 8238471
    Abstract: An apparatus and a method for interference cancellation in a transmitting end of a multi-antenna system are provided. A precode is generated which maximizes a diversity gain of one or more receive antennas using channel information of the receive antennas to be serviced. Transmit powers of the receive antennas are updated by taking into account a power loss and a shaping loss according to a dirty paper coding. Transmit signals are precoded by updating the precode according to the updated transmit powers. The dirty paper coding is performed on the precoded transmit signals to be transmitted to the receive antennas.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: August 7, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: In-Soo Hwang, Yung-Soo Kim, Myeon-Kyun Cho, Eun-Seok Ko, Vahid Tarokh
  • METHOD FOR PERFORMING SOFT DECISION DECODING OF EUCLIDEAN SPACE REED-MULLER CODES
    Publication number: 20120185755
    Abstract: Soft decision decoding of a codeword of a Reed-Muller (RM) code by selecting an optimal decomposition variable i using a likelihood calculation. A code RM(r, m) is expressed as {(u, uv)|u?RM(r, m?1) and v?RM(r?1, m?1)) where uv denotes a component-wise multiplication of u and v, and (u, uv)=(r1, r2). A receive codeword is separated into r1=u and r2=uv based on the optimal decomposition variable, and r2 is decoded according to the optimal decomposition variable, using a RM(r?1, m?1) decoder to obtain a decoded v and a first set of decoded bits. The decoded v is combined with r1 using (r1+r2v)/2, and (r1+r2V)/2 is decoded using a RM(r, m?1) decoder to obtain a decoded u and a second set of decoded bits.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 19, 2012
    Inventors: Philip Orlik, Raymond Yim, Kieran Parsons, Vahid Tarokh, Jinyun Zhang
  • METHOD AND APPARATUS FOR DATA TRANSMISSION USING MULTIPLE TRANSMIT ANTENNAS
    Publication number: 20120147987
    Abstract: A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MSLE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.
    Type: Application
    Filed: December 8, 2011
    Publication date: June 14, 2012
    Inventors: Arthur Robert Calderbank, Ayman F. Naguib, Nambirajan Seshadri, Vahid Tarokh
  • Complementary beamforming methods and apparatuses
    Patent number: 8195242
    Abstract: Improved methods and apparatuses are provided to address a potential “hidden beam problem” in wireless communication systems employing smart antennas. The improved methods and apparatuses utilize complementary beamforming (CBF) techniques, such as, for example, Subspace Complementary Beamforming (SCBF), Complementary Superposition Beamforming (CSBF) and/or Single Beam Complementary Beamforming (SBCBF) techniques.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: June 5, 2012
    Assignee: XR Communications, LLC
    Inventors: Vahid Tarokh, Yang-Seok Choi, Siavash Alamouti
  • Near-optimal low-complexity decoding of space-time codes for fixed wireless applications
    Patent number: 8179991
    Abstract: An improved multi-antenna receiver is realized for detecting signals transmitted by a multi-antenna transmitter by summing signals received at the plurality of receiver antennas after multiplying each by a respective constant. The summed signal is applied to a maximum likelihood detector. The respective constants, ?j, where j is an index designating a particular receiver antenna, are determined by evaluating the largest eigenvector of the matrix A, where ? is a vector containing values ?j, and A is a matrix containing elements ?ij, which is the transfer function between the ith transmitter antenna to the jth receiver antenna. The ?ij terms are determined in the receiver in conventional ways.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: May 15, 2012
    Assignee: AT&T Mobility II LLC
    Inventors: Titus Lo, Vahid Tarokh
  • APPARATUS AND METHOD USING MATRIX NETWORK CODING
    Publication number: 20110307765
    Abstract: Provided are a communication apparatus and method using a matrix network coding scheme. The communication apparatus includes a reception unit to receive a corrupted packet including a plurality of corrupted words, and a controller to estimate a first decoded word corresponding to the corrupted words based on the corrupted words and a generator matrix. The controller generates a second decoded word corresponding to the corrupted words based on a codebook and the estimated first decoded word. The codebook is based on the generator matrix. The controller generates a message based on a plurality of second decoded words respectively corresponding to the plurality of corrupted words.
    Type: Application
    Filed: February 15, 2011
    Publication date: December 15, 2011
    Inventors: Kwang Taik Kim, Chan Soo Hwang, Vahid Tarokh