Patents by Inventor R. Tushar Moorti

R. Tushar Moorti 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).

  • Patent number: 7586881
    Abstract: A method for multiple input multiple output wireless communication begins by determining protocols of wireless communication devices within the proximal region. The method continues by determining whether the protocols of the wireless communication devices within a proximal region are of a like protocol. The method continues by determining the a number of transmit antennas. The method continues, when the protocols of the wireless communication devices within a proximal region are of the like protocol, formatting preamble of a frame of a wireless communication utilizing at least one of cyclic shifting of symbols, cyclic shifting of tones, sparse tone allocation, and sparse symbol allocation based on the number of transmit antennas.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: September 8, 2009
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, R. Tushar Moorti, Matthew J. Fischer, Christopher Young
  • Patent number: 7555053
    Abstract: A method for configuring a multiple input multiple output (MIMO) wireless communication begins by generating a plurality of preambles for a plurality of transmit antennas. Each of the plurality of preambles includes a carrier detection sequence at a legacy transmit rate, a first channel sounding at the legacy transmit rate, a signal field at the legacy transmit rate, and Z?1 channel soundings at a MIMO transmit rate, where L corresponds to a number of channel soundings. The method continues by simultaneously transmitting the plurality of preambles via the plurality of transmit antennas.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: June 30, 2009
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, R. Tushar Moorti, Christopher J. Hansen
  • Patent number: 7535972
    Abstract: A programmable transmitter generates a frame in a frame format according to one of a plurality of operating modes using a frame structure table storing a respective frame format for each of the operating modes. The transmitter includes a frame structure engine that receives a mode selection signal indicative of a select operating mode, and accesses the frame structure table to determine the frame format of the select operating mode. The frame structure engine produces a control signal to a frame generator to control the generation of a frame in the frame format of the select operating mode.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: May 19, 2009
    Assignee: Broadcom Corporation
    Inventors: Joachim S. Hammerschmidt, Bruce E. Edwards, Venkat Kodavati, R. Tushar Moorti, Ling Su, Jason A. Trachewsky, Andrew Wagner
  • Publication number: 20080310351
    Abstract: A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for each transmit antenna of the MIMO wireless communication, generating a carrier detect field, wherein, from transmit antenna to transmit antenna, the carrier detect field is cyclically shifted. The method continues by, for a first grouping of the transmit antennas of the MIMO wireless communication: generating a first guard interval following the carrier detect field; and generating at least one channel sounding field, wherein, from transmit antenna to transmit antenna in the first grouping, the at least one channel sounding field is cyclically shifted, and wherein the at least one channel sounding field follows the first guard interval.
    Type: Application
    Filed: July 15, 2008
    Publication date: December 18, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, R. Tushar Moorti, Matthew J. Fischer, Christopher Young
  • Patent number: 7423989
    Abstract: A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for each transmit antenna of the MIMO wireless communication, generating a carrier detect field, wherein, from transmit antenna to transmit antenna, the carrier detect field is cyclically shifted. The method continues by, for a first grouping of the transmit antennas of the MIMO wireless communication: generating a first guard interval following the carrier detect field; and generating at least one channel sounding field, wherein, from transmit antenna to transmit antenna in the first grouping, the at least one channel sounding field is cyclically shifted, and wherein the at least one channel sounding field follows the first guard interval.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: September 9, 2008
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, R. Tushar Moorti, Matthew J. Fischer, Christopher Young
  • Patent number: 7400643
    Abstract: A method for transmitting wide bandwidth signals in a network that includes legacy devices begins by determining channel bandwidth of a channel that supports the wide bandwidth signals in the network. The method continues by determining overlap of legacy channel bandwidth with the channel bandwidth of the channel. The method continues by providing a legacy readable preamble section within the channel where the legacy channel bandwidth overlaps the channel bandwidth of the channel.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: July 15, 2008
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, R. Tushar Moorti
  • Publication number: 20080151822
    Abstract: A method for generating a preamble of a frame for a wide-bandwidth channel wireless communication begins by generating a legacy carrier detect field. The method continues by generating a channel sounding field, wherein the channel sounding field includes a plurality of tones within the wide-bandwidth channel, wherein a first set of the plurality of tones corresponds to tones of a legacy channel sounding field. The method continues by generating a legacy signal field, wherein, in time, the legacy signal field follows the channel sounding field, which follows the legacy carrier detect field.
    Type: Application
    Filed: July 10, 2007
    Publication date: June 26, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, R. Tushar Moorti
  • Patent number: 7233773
    Abstract: A method for configuring a multiple input multiple output (MIMO) wireless communication begins by generating a first preamble for a first antenna of the MIMO communication, wherein the first preamble includes a carrier detect field, a first channel select field, a first signal field, and a second signal field. The method continues by generating a second preamble for at least one other antenna of the MIMO communication, wherein the second preamble includes the carrier detect field, a plurality of channel select fields, and the second signal field. The method continues by simultaneously transmitting the carrier detect field via the first antenna and the least one other antenna. The method continues by transmitting the first channel select field and the first signal field via the first antenna.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: June 19, 2007
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, R. Tushar Moorti, Matthew J. Fischer, Christopher Young
  • Publication number: 20050180353
    Abstract: A method for multiple input multiple output wireless communication begins by determine the protocol utilized by each of the wireless communication devices within the proximal region. The method continues by determining whether the protocols of the wireless communication devices within a proximal region are of a like protocol. The method continues by determining the a number of transmit antennas. The method continues, when the protocols of the wireless communication devices within a proximal region are of the like protocol, formatting preamble of a frame of a wireless communication utilizing at least one of cyclic shifting of symbols, cyclic shifting of tones, sparse tone allocation, and sparse symbol allocation based on the number of transmit antennas.
    Type: Application
    Filed: October 26, 2004
    Publication date: August 18, 2005
    Inventors: Christopher Hansen, Jason Trachewsky, R. Tushar Moorti, Matthew Fischer, Christopher Young