×

Method and apparatus for receiving and decoding communication signals in a CDMA receiver using partial de-correlation

  • US 5,414,699 A
  • Filed: 09/27/1993
  • Issued: 05/09/1995
  • Est. Priority Date: 09/27/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a Code Division Multiple Access (CDMA) receiver which utilizes adaptive equalization for minimizing errors between a Direct Sequence Spread Spectrum (DS-SS) signal and a reference signal;

  • a method for optimizing convergence rate and minimizing errors in decoding a received signal comprising the steps of;

    a) receiving a DS-SS communication signal including at least one near signal, noise, and a desired DS-SS signal, wherein said desired DS-SS signal comprises binary bits coded with a spreading chip sequence;

    b) sampling during a bit interval said received DS-SS communication signal at a chip rate to produce received samples, said received samples being correlated with each other;

    c) partially de-correlating the received samples by employing a partial orthogonal transformation algorithm;

    d) providing a first subspace having a de-correlated segment associated with the desired DS-SS signal and the at least one near signal;

    e) providing a second subspace having a correlated segment associated with noise;

    f) adaptively and individually equalizing the first subspace to optimize convergence rate and minimize errors; and

    g) adaptively and collectively equalizing the second subspace.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×