An Improved Transform Domain Narrowband Interference Suppression Technique in CDMA System

摘要

Tbe narrowband interference (NBI) suppression in code division multiple access (CDMA) system using the transform domain method is discussed in this paper. Detection of the interference frequency is a key issue in this method, of which the accuracy and reliability should be guaranteed. A new algorithm based on moving averaging is proposed in this study. Theoretical analysis and simulation results have demonstrated that the proposed algorithm has much lower mean square error (MSE) of NBI center frequency estimation and much better bit error rate (BER) compared with the traditional algorithms.