Research Of Wideband Signal Processing Method Based On Intersection Of Frequency Spectrum Techniques

The data rate with high capacity and speed of wideband signal makes its real-time processing to be limited by hardware and software. The method about intersection of frequency spectrum techniques can solve such problems effectively.In this paper, the method of wideband signal processing based on intersection of frequency spectrum techniques is studied primarily. An analysis of designing the reconstruction filterbanks is made and M-channel reconstruction filterbanks have been designed. The approach of subband pulse compression on wideband signal is researched, its basic structure and performance simulation results are given as well. The effect of the filter length on the system and the complexity for realizing it are discussed. It has been used in a practical project, the processing results of the measured datas from which proves its correctness and validity. Adaptive Sidelobe Cancellation System(ASLC) under wideband interfere surroundings is also discussed. Wideband interfere sidelobe cancellation based on spectrum partition techniques and the performance analysis are investigated. It is shown that ASLC using subband processing approach based on spectrum partition techniques can raise the correlation between main channel and accessory channel, so as to increase the cancellation gain. At the same time, it can weaken the aggravation of disparity of two paths characteristics about amplitude and phase to cancellation gain, improving the performance of the system.