Pulse interference mitigation techniques for QPSK and QAM using Viterbi decoding

A severe spectrum shortage for wireless communication systems poses the spectrum overlapping and the interference problem with a significant performance degradation. To avoid this problem, it is essential to employ the techniques for interference mitigation. The goal of this paper is to investigate the performance of some interference mitigation techniques in the systems using Viterbi decoding, i.e., 1-norm metric, received power based limiting, puncturing and metric based limiting. These methods are compared from the view point of bit error rate (BER) obtained by computer simulations. Simulation results show the superiority of metric based limiting, which yields better BER performance.