Adaptive time-varying cancellation of LFM interferences in spread-spectrum systems
Gang Ou · Systems engineering and electronics · 2004
Linear frequency modulation (LFM) interferences may be a kind of preferred wideband interferences in spread-spectrum. This paper has presented an adaptive time-varying LFM interferences cancellation algorithm based on parameters estimation from discrete-time observations. The performance of LFM interferences suppression has been analyzed by simulation. It is showed that this algorithm is a practicable and efficient LFM interferences suppression algorithm. On the one hand the algorithm can conquer the shortcoming of complex adaptive interferences suppression filters whose interferences rejection ability will degrade as the sweep rate of LFM signals increases, on the other hand it has small computational complexity in contrast to the adaptive time-varying cancellation algorithms based on time-frequency analysis.;