Patents by Inventor Ali D. Pirooz

Ali D. Pirooz 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).

  • Ultra wideband baseband chip with intelligent array radio and method of use thereof
    Patent number: 7986736
    Abstract: An ultra wideband receiver, based on multiband orthogonal frequency division multiplexing (MB-OFDM), combines digital data from multiple channels after signal processing and before decoding. The receiver provides a master controller that synthesizes packet synchronization, frame synchronization, and sampling frequency offset information from multiple channels into signals that simultaneously control all channels of the receiver.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: July 26, 2011
    Assignee: Sigma Designs, Inc.
    Inventors: Hung C. Nguyen, Catherine A. French, Jayesh Desai, Ruoyang Lu, Ali D. Pirooz
  • 3GPP WCDMA receiver using pipelined apparatus and method for performing cell searches
    Patent number: 7580428
    Abstract: A pipelined cell search apparatus having a primary search stage, a secondary stage and a Gold code stage. The primary stage receives a primary synchronization channel (P-SCH) signal, detects a maximum peak of a slot boundary in the P-SCH signal, and generates slot timing data from the maximum peak. The secondary search stage receives a secondary synchronization channel (S-SCH) signal and the slot timing data, and detects in the S-SCH signal a maximum peak of a frame boundary. The secondary search stage generates frame timing data and a group ID of a base station transmitting the P-SCH signal and the S-SCH signal. The Gold code search stage receives a common control pilot channel (CPICH) signal, the slot timing data, the frame timing data, and the group ID and detects in the CPICH signal a maximum peak associated with a Gold code of the base station.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: August 25, 2009
    Assignee: National Semiconductor Corporation
    Inventors: Karim Nassiri-Toussi, Mohammad Reza Shikh-Bahaei, Ali D. Pirooz
  • Synchronization method for symbol boundary detection in UWB-OFDM
    Patent number: 7542516
    Abstract: A method is presented for packet detection and symbol boundary location using a two-step sign correlation procedure. When the correlation crosses a threshold, a packet detection signal is generated to initiate processing of downstream blocks, and a symbol boundary location signal is generated for use in aligning data during processing.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: June 2, 2009
    Assignee: Sigma Designs, Inc.
    Inventors: Ali D. Pirooz, Catherine A. French, Jayesh Desai, Hung C. Nguyen
  • 3GPP WCDMA receiver using pipelined apparatus and method for performing cell searches
    Patent number: 7194011
    Abstract: A pipelined cell search apparatus having a primary search stage, a secondary stage and a Gold code stage. The primary stage receives a primary synchronization channel (P-SCH) signal, detects a maximum peak of a slot boundary in the P-SCH signal, and generates slot timing data from the maximum peak. The secondary search stage receives a secondary synchronization channel (S-SCH) signal and the slot timing data, and detects in the S-SCH signal a maximum peak of a frame boundary. The secondary search stage generates frame timing data and a group ID of a base station transmitting the P-SCH signal and the S-SCH signal. The Gold code search stage receives a common control pilot channel (CPICH) signal, the slot timing data, the frame timing data, and the group ID and detects in the CPICH signal a maximum peak associated with a Gold code of the base station.
    Type: Grant
    Filed: August 31, 2002
    Date of Patent: March 20, 2007
    Assignee: National Semiconductor Corporation
    Inventors: Karim Nassiri-Toussi, Mohammad Reza Shikh-Bahaei, Ali D. Pirooz
  • Apparatus and method for secondary synchronization channel detection in a 3GPP WCDMA receiver
    Patent number: 7095811
    Abstract: A pipelined cell search apparatus comprises a secondary search stage that receives a secondary synchronization channel (S-SCH) signal.
    Type: Grant
    Filed: August 31, 2002
    Date of Patent: August 22, 2006
    Assignee: National Semiconductor Corporation
    Inventors: Mohammad Reza Shikh-Bahaei, Karim Nassiri-Toussi, Ali D. Pirooz