Patents by Inventor Ravin Perinpanayagam

Ravin Perinpanayagam 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).

  • Satellite communication apparatus
    Patent number: 6957044
    Abstract: A satellite communication apparatus has a corrector for reducing distortion of a signal in a communication channel. The corrector is formed by a forward model representative of a pre-calculated estimate of non-linearity and group delay of the satellite transmission/reception channel from the input to the up sampler through to the output of the down sampler. The forward model may also comprise a model of magnitude response of a satellite input multiplexer filter and output multiplexer filter. Cascaded identical stages of the corrector may be provided so that distortion in the channel is successively reduced towards zero by each successive stage. An initial approximator which is substantially the inverse of the distorting function of the forward model may be provided.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: October 18, 2005
    Assignee: Tandberg Television ASA
    Inventors: Brian Herbert Beech, David G. Edwards, Ravin Perinpanayagam
  • Satellite communication apparatus
    Publication number: 20020164949
    Abstract: A satellite communication apparatus has a corrector for reducing distortion of a signal in a communication channel. The corrector is formed by a forward model representative of a pre-calculated estimate of non-linearity and group delay of the satellite transmission/reception channel from the input to the up sampler through to the output of the down sampler. The forward model may also comprise a model of magnitude response of a satellite input multiplexer filter and output multiplexer filter. Cascaded identical stages of the corrector may be provided so that distortion in the channel is successively reduced towards zero by each successive stage. An initial approximator which is substantially the inverse of the distorting function of the forward model may be provided.
    Type: Application
    Filed: March 13, 2002
    Publication date: November 7, 2002
    Inventors: Brian Herbert Beech, David G. Edwards, Ravin Perinpanayagam