Please download the dossier by clicking on the dossier button x
×

Intermodulation compensation in multi-channel amplifiers

  • US 6,233,436 B1
  • Filed: 06/09/1999
  • Issued: 05/15/2001
  • Est. Priority Date: 12/16/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for reducing intermodulation distortion during a radiotelephone communication, comprising:

  • a plurality of generators each comprising a voice coder for digitizing, compressing and error correction coding a voice signal, said voice coder also providing voice activity signal indicative of the presence or absence of speech;

    modulation means for impressing the coded, digital voice signal on a radio frequency carrier for transmission;

    a waveform generator for computing at least one intermodulation compensation waveforms that are a function of the active speech modulated signals; and

    a switching means operated by said voice activity indicating signal for selecting either the speech modulated radio signal from said modulation means when speech is present and for selecting an intermodulation compensation waveform from said waveform generator during speech pauses.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×