Patents by Inventor Ayman A. Mostafa

Ayman A. Mostafa 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).

  • Systems and methods for interference cancellation in a radio receiver system
    Patent number: 7496164
    Abstract: A system and method for interference cancellation is provided to cancel/greatly reduce the interference of a wireless network. The interferers are separated from a desired signal using independent component analysis by hypothesizing the transmitting sequence. An optional whitening filter is used after the signal separation to improve the signal conditioning. The separated signal is processed by a second pass channel estimation to improve the signal channel estimation and is fed to a Maximum Likelihood Sequence Estimation (MLSE) algorithm, such as a Viterbi algorithm, for signal detection.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: February 24, 2009
    Assignee: AT&T Mobility II LLC
    Inventor: Ayman A. Mostafa
  • Monitoring system for TV, cable and VCR
    Patent number: 5495282
    Abstract: In a system for monitoring use of a video monitoring system, RF signals are injected into a cable converter and a VCR in order to detect channels selected by the cable converter and VCR. Installation of probes is not required for channel detection. Channel identification signals are also injected into the VCR and cable converter for recording by the VCR on videotape. Respective channel identification signals are provided to the cable converter and VCR with time multiplexing. The state of the "TV/VCR" switch of the VCR is determined by injecting a code signal into the VCR and determining whether that signal is present in an RF video signal output by the VCR. The system includes a switch for interconnecting the cable converter, VCR and TV and also for coupling injection signals to respective inputs of the cable converter and VCR. The system also includes an injection signal receiver that detects signals injected into and passed through the VCR and cable converter for the purpose of channel detection.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: February 27, 1996
    Assignee: The Arbitron Company
    Inventors: Ayman A. Mostafa, Wendell D. Lynch, James M. Jensen
  • Systems and methods for interference cancellation in a radio receiver system
    Patent number: RE43791
    Abstract: A system and method for interference cancellation is provided to cancel/greatly reduce the interference of a wireless network. The interferers are separated from a desired signal using independent component analysis by hypothesizing the transmitting sequence. An optional whitening filter is used after the signal separation to improve the signal conditioning. The separated signal is processed by a second pass channel estimation to improve the signal channel estimation and is fed to a Maximum Likelihood Sequence Estimation (MLSE) algorithm, such as a Viterbi algorithm, for signal detection.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: November 6, 2012
    Assignee: AT&T Mobility II LLC
    Inventor: Ayman A. Mostafa