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Processing for improved performance and reduced pilot

  • US 6,483,868 B2
  • Filed: 11/13/2001
  • Issued: 11/19/2002
  • Est. Priority Date: 05/14/1998
  • Status: Expired due to Term
First Claim
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1. A receiver for use in a communication station of a CDMA system wherein a plurality of communication stations communicate with each other over a CDMA air interface using a plurality of channels and a pilot signal for carrier-offset recovery during reception, the receiver comprising:

  • an adaptive matched filter for receiving demodulated CDMA communication signals producing a filtered signal by using a weighting signal;

    a rake receiver for receiving the demodulated CDMA communication signals and a pseudo-noise signal generated for a selected channel and producing a filter weighting signal;

    means for defining the filter weighting signal with a correction signal, said correction signal to produce the weighting signal used by said adaptive matched filter;

    a channel despreader for said selected channel coupled to said adaptive matched filter output for despreading said filtered signal using the pseudo-noise signal generated for said selected channel to produce a despread channel signal of said selected channel;

    a pilot channel despreader for a pilot channel coupled to said adaptive matched filter output for despreading said filtered signal using a pseudo-noise signal generator for said pilot channel to produce a despread pilot signal of said pilot channel;

    a hard decision processor in association with a complex conjugate processor for receiving the despread channel signal of said selected channel and producing said correction signal; and

    a phase-locked loop utilizing at least said despread pilot signal for producing a phase correction signal which is applied to produce phase-corrected channel signals.

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