Patents by Inventor Jalal Alisobhani

Jalal Alisobhani 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).

  • Spread-spectrum GMSK/M-ary radio with oscillator frequency correction
    Patent number: 6760393
    Abstract: A communication device includes a transmitter and receiver. The transmitter includes an M-ary encoder configured to generate an M−1 number of distinctive symbols each comprising k bits. M is equal to 2k and k is a positive integer. The transmitter also includes a code generator configured to produce spread spectrum codeword sequences based on the symbols generated by the M-ary encoder and based on a first and a second Gold code polynomials. The transmitter sends a radio signal based on the spread spectrum codeword sequences. The receiver is configured to receive the radio signal. The receiver includes a first shift register configured to receive an input signal generated based on the received radio signal and a second shift register configured to receive and circularly shift a locally generated codeword sequence that is identical to the codeword sequence used to encode the symbols.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: July 6, 2004
    Assignee: Navcom Technology, Inc.
    Inventors: Jalal Alisobhani, Donald K. Leimar, Richard Kai-Tuen Woo, Mark Philip Kaplan
  • Spread-spectrum GMSK/M-ary radio
    Patent number: 6430212
    Abstract: A communication device includes a transmitter and receiver. The transmitter includes an M-ary encoder configured to generate an M−1 number of distinctive symbols each comprising k bits. M is equal to 2k and k is a positive integer. The transmitter also includes a code generator configured to produce spread spectrum codeword sequences based on the symbols generated by the M-ary encoder and based on a first and a second Gold code polynomials. The transmitter sends a radio signal based on the spread spectrum codeword sequences. The receiver is configured to receive the radio signal. The receiver includes a first shift register configured to receive an input signal generated based on the received radio signal and a second shift register configured to receive and circularly shift a locally generated codeword sequence that is identical to the codeword sequence used to encode the symbols.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: August 6, 2002
    Assignee: Navcom Technology, Inc.
    Inventors: Jalal Alisobhani, Donald K. Leimer, Richard Kai-Tuen Woo, Mark Philip Kaplan
  • Radar terrain signal suppressor
    Patent number: 4533915
    Abstract: An apparatus for the suppression of terrain generated clutter in a pulsed weather radar system. Weather induced returns typically having scintillation frequencies greater than 50 Hz may be isolated from terrain backscattered signals utilizing a digital filter technique having a sampling rate equal to the pulsed radar PRF.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: August 6, 1985
    Assignee: Sperry Corporation
    Inventors: George A. Lucchi, Jalal Alisobhani