Patent ID: 6865218
Filing Date: 2005-03-08
Classification: H04B

Abstract:
1. A method of reducing multipath interference in a received composite signal comprising a plurality of multipath signals, the method comprising: correlating the received composite signal with a PN code sequence at a time offset corresponding to a first one of the plurality of propagation paths to recover a signal of interest from a first multipath signal; multiplying the signal of interest by a first channel coefficient determined for the first one of the plurality of propagation paths to adjust a gain and phase of the signal of interest; correlating the received composite signal with the PN code sequence at a time offset corresponding to a delay difference between the first multipath signal and a second multipath signal to generate a multipath interference estimate; multiplying the multipath interference estimate by the first channel coefficient and by a second channel coefficient determined for the second one of the plurality of propagation paths to adjust a gain and phase of the multipath interference estimate; and subtracting the multipath interference estimate from the signal of interest to reduce multipath interference.