×

DS/CDMA receiver using moving-averaged pilot signals for weighting and phase rotation of orthogonal data symbol vectors

  • US 5,548,613 A
  • Filed: 12/29/1994
  • Issued: 08/20/1996
  • Est. Priority Date: 12/30/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A direct sequence spread spectrum receiver comprising:

  • first correlator means multiplying in-phase and quadrature spread data signals and in-phase and quadrature spread pilot signals with orthogonal despreading sequences at a chip rate to produce in-phase and quadrature orthogonal despread data signals and in-phase and quadrature despread pilot signals;

    data integrator means integrating the in-phase and quadrature despread data signals at a symbol rate to produce in-phase and quadrature data symbols;

    pilot integrator means integrating the in-phase and quadrature despread pilot signals at said symbol rate to produce in-phase and quadrature pilot symbols;

    first and second moving average means successively summing a predetermined number of the in-phase and quadrature pilot symbols to produce first and second moving average values, respectively;

    first and second multiplier means multiplying the in-phase and quadrature data symbols of the data integrator means with the first and second moving average values, respectively; and

    means summing output signals of the first and second multiplier means.

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