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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
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