Patent ID: 6922434

Claim:
A method of recovering information encoded in a spread spectrum signal transmitted in a communications medium, the method comprising. receiving at least one multipath version of a composite signal including the spread spectrum signal from the communications medium; selecting a set of time-offsets; correlating the composite signal with a spreading sequence at each of the time-offsets in the set of time-offsets to produce a first set of time-offset correlations of the composite signal with the spreading sequence; estimating noise correlation among the time-offset correlations to produce noise correlation estimates; selecting a subset of the time-offsets from the set of time-offsets based on the noise correlation estimates; correlating the composite signal with a traffic spreading sequence at each of the time-offsets in the selected subset of the time-offsets to produce a plurality of traffic correlations; and combining the plurality of traffic correlations using a weighted combination to estimate information encoded in the transmitted spread spectrum signal.