COCHANNNEL INTERFERENCE MITIGATION IN THE TIME-SCALE DOMAIN - THE CIMTS ALGORITHM

In many communication systems, the problem of co-channel interference is encountered when along with the signal of interest (SOI), one or mo re interfering signals are present in a common receiver. The SOI and t he interference(s) are correlated, possess similar characteristics and power, and share the same region of support both in time and frequenc y domains, In this paper, we present the co-channel interference mitig ation in the time-scale domain (CIMTS) algorithm which estimates the S OT and the interfering signal from their superposition in the presence of additive noise, This method is inspired by the reconstruction of t he interference from the null space of the SOI in the time-scale domai n, Once the null space of the SOI is determined, the interfering signa l is reconstructed via a set of linear operations, Therefore, the SOI is estimated by a simple subtraction of the estimated interference fro m the observations.