Patent ID: 6801565
Filing Date: 2004-10-05
Classification: H04B

Abstract:
A method of recovering information encoded in a spread spectrum signal transmitted in a communications medium, the method comprising the steps of:receiving a composite signal including a spread spectrum signal from the communications medium; correlating the received composite signal with a spreading sequence to generate time-offset correlations; combining a first group of the correlations to produce a first combined value; combining a second group of the correlations to produce a second combined value; and combining the first and second combined values in a manner that compensates for correlated impairment in the composite signal to generate an estimate of information in the transmitted spread spectrum signal, wherein said step of combining the first and second combined values comprises the step of combining the first and second values based on an estimated impairment correlation and on a composite channel response that reflects said step of combining the first group correlations and said step of combining the second group of correlations.