Patent ID: 6496534
Filing Date: 2002-12-17
Classification: H04B

Abstract:
An improved method of canceling co-channel interference in a code division multiple access (CDMA) receiver that obtains a received signal in which signals transmitted by a plurality of stations are present, despreads the received signal, thereby obtaining estimated symbol values transmitted by each of said stations, respreads the estimated symbol values, thereby obtaining estimated interference transmitted by each of said stations, and subtracts the estimated interference from the received signal, thereby obtaining a residual signal, the improvement comprising the steps of:calculating at least one weighting factor separately and independently for each respective station among said stations; multiplying the symbol values estimated to have been transmitted by each said station by the respective at least one weighting factor calculated for said each station when said estimated symbol values are respread, to minimize said residual signal; and adjusting said weighting factors at certain intervals.