Patent ID: 7352833
Filing Date: 2008-04-01
Classification: H04B,H04L

Abstract:
1. A spread spectrum receiver, comprising: an antenna for receiving a spread spectrum signal; a lattice filter coupled to the antenna, wherein the lattice filter is configured to remove magnitude distortion from the spread spectrum signal to produce a lattice filter output; an autocorrelation filter coupled to receive the lattice filter output, wherein the autocorrelation filter is configured to remove phase distortion from the lattice filter output; a correlation stage included in the autocorrelation filter to receive the lattice filter output and perform a set of time-shifted correlations on the lattice filter output; an array of correlators included in the correlation stage, each of the correlators coupled to receive delayed versions of the lattice filter output and generate a respective correlation output; and an integration stage coupled to the correlation stage to integrate each output of the correlation stage, wherein the integrating of each output of the correlation stage over the period of time generates a running impulse response characterizing the phase distortion of the spread spectrum signal.