Narrow-band interference rejection in OFDM-CDMA transmission system

Abstract

In this paper, we present a new method called "differential threshold exciser (DTE)" to suppress narrow-band interference in OFDM-CDMA transmission system. Also, another threshold exciser, "over-through threshold exciser (OTTE)", is discussed. The two methods use different transform characteristics of the interference and information signal to suppress the narrow-band interference no matter the interference is stationary or nonstationary. The DTE algorithm has nearly the same performance as the OTTE algorithm with less computation complexity.