Cascade Division of Multi-type Filters in efficient Implementation of DDC
Based on the theories and techniques of Digital Down Conversion (DDC) in software radio receiver, this paper puts forward a new method to realize DDC by using cascade division of Multi-types filter. CIC (Cascaded Integrator-Comb) filter, two HB(Half-Band) filters and plastic FIR filter are involved in the realization of the decimation of DDC. The . requirements of multipliers and adders and the order of filters are reduced effectively. Meanwhile, the feasibility and validity of using the interpolated second-order polynomial (ISOP) filter in order to reduce the passband droop caused by CIC filtering with little degradation in aliasing attenuation sand are analyzed and validated in this paper, and the performance requirement of DDC is accomplished efficiently. Finally, the superiority of this technique is demonstrated by comparing it with the conventional method of FIR filtering.
cascaded integrator-comb filter half-band filter interpolated second-order polynomial filter digital down onversion
Hao Wu Xiaochen Zhu
School of Electronic Engineering University of Electronic Science and Technology of China Chengdu, China
国际会议
重庆
英文
1179-1182
2011-08-20（万方平台首次上网日期，不代表论文的发表时间）