METHOD AND APPARATUS FOR CANCELLING CO-CHANNEL INTERFERENCE IN A RECEIVING SYSTEM USING SPATIO-TEMPORAL WHITENING

摘要

Methods and apparatus for canceling co-channel interference in a receiving system using spatio-temporal whitening. In some embodiments, a spatio-temporal interference canceling method, and apparatus for carrying out the method are provided which effectively cancel co-channel interference despite fre-quency offset between the desired signal and the interferer in a TDMA type sys-tem. Real and imaginary component values of the total received signal are used for virtual diversity branches, and a vector-valued auto regressive model (402, 1302) is used to characterize the interference. In other embodiments, spatio-temporal interference whitening (1603, 1703) is used to improve timing estimates used for synchronization. The two uses of spatio-temporal whitening can be com-bined in one receiver. The invention is typically implemented in one or more pro-grammed digital signal processors or application specific integrated circuits (ASICS), embodied in a receiving system.