초록 ▼

A code division multiple access receiver estimates symbol values transmitted by different stations by despreading a combined received signal, weights the estimated symbol values by use of weighting factors calculated for the different stations, respreads the weighted symbol values to estimate the in

A code division multiple access receiver estimates symbol values transmitted by different stations by despreading a combined received signal, weights the estimated symbol values by use of weighting factors calculated for the different stations, respreads the weighted symbol values to estimate the interference due to each station, and subtracts the estimated interference from the received signal to produce a residual signal. The weighting factors can be calculated from the residual signal; the weighting factors are calculated so as to minimize the power of the residual signal. The weighting factors are adjusted at certain intervals, preferably at intervals determined from the rate of fading of the received signal.

대표청구항 ▼

1. 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 ea

1. 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.