A Digital Down Conversion of WB Radar Based On Intersection of Spectrum

摘要：

A new wideband digital down conversion (WB-DDC) method based on intersection of frequency spectrum is proposed.In this method,the input wideband signal is split into several subbands by analysis filter bank and each of these subbands with explicit meanings can be processed independently. The outputs of useful subbands are combined by synthesis filter bank to get the complex baseband signal. That means subband operation becomes possible and great flexible comparing with the traditional structure.Moreover,the new method is computationally more efficient than the traditional method. The methods of designing filter bank and the perfect reconstruction condition are analyzed. The influence of the prototype filter to reconstruction is indicated by simulation. The simulation results show that the presented method is of good performance.

关键词： Digital down conversion (DDC) Polyphase filter Analysis filter bank Synthesis filter bank

作者: Y.J.Wang M.Li L.Wang P.Zhang

作者单位: National Lab of Radar Signal Processing,Xidian University,P.R.China

会议类型: 国际会议

会议名称: 2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)

会议地点: 西安

会议语种:英文

页码: 921-925

在线出版日期: 2009-10-26（万方平台首次上网日期，不代表论文的发表时间）