Patents by Inventor Juan G. Gonzalez

Juan G. Gonzalez 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: 7395493
    Abstract: The present invention provides systems and methods for adaptively decoding transmitted frames efficiently in non-Gaussian, non-stationary environments. One such system comprises a decoder adapted to decode a received transmission frame using a decoding scheme, a channel assessment unit for sensing channel characteristics, and a tuning unit for adjusting the decoding scheme based, at least in part, on channel characteristics sensed by the channel assessment unit.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: July 1, 2008
    Assignee: Lucent Technologies Inc.
    Inventors: Walid Ahmed, Juan G. Gonzalez, Salim Manji, Jose Luis Paredes
  • Patent number: 7386779
    Abstract: The present invention provides systems and methods for correcting errors in a received frame. The present invention introduces diversity into an error detection and correction system at the receiver side by decoding a received frame using a plurality of decoding schemes. Each of these schemes are optimized for a different set of underlying assumptions. The schemes may be optimized to account for various types of noise including, not limited to, Gaussian noise and impulsive noise. The plurality of decoded frames are then validated using an outer decoder to choose a valid frame from candidate decoded frames. By including a plurality of decoders using a plurality of decoding schemes, the error detection and correction system may accurately detect and correct errors in a constantly changing environment having constantly changing noise patterns.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: June 10, 2008
    Assignee: Lucent Technologies
    Inventors: Walid Ahmed, Juan G. Gonzalez, Salim Manji, Jose Luis Paredes
  • Patent number: 7120210
    Abstract: A clipped metric function is utilized to mitigate the adverse effects of impulsive noise (e.g., lightening, motor vehicle ignition noise) on communications signals. The clipped metric function may be used alone or in conjunction with conventional signal clipping. In one embodiment, a clipped Euclidean metric function is determined as a function of the input signal. The input signal is processed in accordance with the clipped Euclidean metric function, to provide a clipped metric signal. The clipped metric signal is processed in accordance with application dependent requirements. The clipped metric function provides improved performance over conventional signal clipping. For example, utilization of a clipped metric function provides improved performance in situations in which the impulsive noise does not increase the amplitude of the input signal to a level that would be clipped by signal clipping.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: October 10, 2006
    Assignee: Lucent Technologies Inc.
    Inventors: Juan G Gonzalez, Salim Manji, Jose L Paredes
  • Patent number: 6961397
    Abstract: A symbol synchronizer comprises a distance metric computation module for computing a metric from received samples using a distance metric function within a symbol sampling period and based on a timing signal for each of the possible symbols in a constellation, a control signal computation module for selecting a smallest and a second smallest metrics, producing a difference by subtracting the smallest metric from the second smallest metric, and deriving a control signal from the difference, and a voltage-control clock for producing the timing signal based on the control signal.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: November 1, 2005
    Assignee: Lucent Technologies Inc.
    Inventors: Walid Ahmed, Juan G. Gonzalez, Salim Manji, Jose Luis Paredes
  • Publication number: 20030223512
    Abstract: The present invention provides systems and methods for adaptively decoding transmitted frames efficiently in non-Gaussian, non-stationary environments. One such system comprises a decoder adapted to decode a received transmission frame using a decoding scheme, a channel assessment unit for sensing channel characteristics, and a tuning unit for adjusting the decoding scheme based, at least in part, on channel characteristics sensed by the channel assessment unit.
    Type: Application
    Filed: June 4, 2002
    Publication date: December 4, 2003
    Inventors: Walid Ahmed, Juan G. Gonzalez, Salim Manji, Jose Luis Paredes
  • Publication number: 20030226086
    Abstract: The present invention provides systems and methods for correcting errors in a received frame. The present invention introduces diversity into an error detection and correction system at the receiver side by decoding a received frame using a plurality of decoding schemes. Each of these schemes are optimized for a different set of underlying assumptions. The schemes may be optimized to account for various types of noise including, not limited to, Gaussian noise and impulsive noise. The plurality of decoded frames are then validated using an outer decoder to choose a valid frame from candidate decoded frames. By including a plurality of decoders using a plurality of decoding schemes, the error detection and correction system may accurately detect and correct errors in a constantly changing environment having constantly changing noise patterns.
    Type: Application
    Filed: May 31, 2002
    Publication date: December 4, 2003
    Inventors: Walid Ahmed, Juan G. Gonzalez, Salim Manji, Jose Luis Paredes
  • Publication number: 20030012316
    Abstract: A symbol synchronizer comprises a distance metric computation module for computing a metric from received samples using a distance metric function within a symbol sampling period and based on a timing signal for each of the possible symbols in a constellation, a control signal computation module for selecting a smallest and a second smallest metrics, producing a difference by subtracting the smallest metric from the second smallest metric, and deriving a control signal from the difference, and a voltage-control clock for producing the timing signal based on the control signal.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 16, 2003
    Inventors: Walid Ahmed, Juan G. Gonzalez, Salim Manji, Jose Luis Paredes
  • Publication number: 20020181624
    Abstract: In the method of making a channel estimate, at least first and second confidence levels that a transmitted data symbol has respective first and second values are determined based on a received data symbol corresponding to the transmitted data symbol. A channel estimate is then determined based on the first and second confidence levels.
    Type: Application
    Filed: April 19, 2001
    Publication date: December 5, 2002
    Inventors: Juan G. Gonzalez, Salim Manji