Patent ID: 6501788
Filing Date: 2002-12-31
Classification: H04B,H04J

Abstract:
In a spread spectrum communications system, a method of recovering a symbol transmitted in a communications medium according to a first spreading sequence of a set of spreading sequences that may be used to transmit symbols in the system, the method comprising the steps of:receiving a communications signal from the communications medium; resolving the received communications signal into a plurality of signal components, a respective one of which is associated with a respective propagation path; correlating the resolved plurality of signal components with the set of spreading sequences to generate a respective set of correlations for a respective one of the resolved signal components, a respective one of the sets of correlations including a respective correlation of a resolved signal component with the first spreading sequence; canceling an interference component associated with a second spreading sequence of the set of spreading sequences from the correlations of the plurality of resolved signal components with the first spreading sequence based on the correlations of the plurality of resolved signal components with the second spreading sequence to generate a set of interference-cancelled correlations of the resolved signal components with the first spreading sequence; and estimating the transmitted symbol from the set of interference-cancelled correlations.