Narrowband interference suppression based on the frequency domain adaptive algorithm

The technologies of narrowband interference suppressions using a frequency domain filter have been introduced widely in the direct sequence spread spectrum system. But the spectrum of direct sequence is supposed as the White spectrum, where thresholds of energy ruling are a constant. According to the characteristic of the direct sequence spectrum, adaptive energy threshold was used to decide the thresholds of energy ruling dynamically. The results of narrowband interference suppressions simulations basing on the adaptive energy threshold algorithm proves that the performance of the adaptive frequency domain filter behaves better.