Interacting multiple model for adaptive narrowband interference rejection in spread spectrum systems

This paper presents an adaptive code-aided technique for the suppression of narrowband interference (NBI) in direct-sequence code-division multiple access (DS-CDMA) systems. This technique uses a multiuser detector based on the interacting multiple model (BOA) algorithm. This detector is based on the concept that the effective model of the received signal at a time instance can be approximated by one of the models in the IMM algorithm. Simulations are used to compare the performance of the proposed technique with that of the recursive least squares (RLS) version of the minimum mean-square error (MMSE) for multiuser detection.