A New Lapped Transform Domain Narrow-band Interference Excision Technique
LI Chong-ni;HU Guang-rui (Department of Electrical Engineering ,Shanghai 200030 China)
A novel communication receiver which uses lapped transform (LT) incorporating modified median filter (MMF) algorithm is designed for narrow-band interference excision. The LT domain MMF algorithm takes full advantages of the direct sequence spread spectrum signal ,as well as the characteristics of LT , performing the transform domain filtering twice the first filtering locates the position of interference and mitigates most of them.the Second filtering is performed in a small neighborhood of the located inter- ference. so LT domain MMF algorithm can completely mitigate the interference without distorting the distorting the desired signal ,Simulation results demonstrate the improved BER performance and increased robustness of our receiver.
【CateGory Index】： TN914.42