| 高效实现DDC的多类滤波器级联技术 |
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| 引用本文： | 杨媛媛,吕幼新.高效实现DDC的多类滤波器级联技术[J].电子信息对抗技术,2011,26(4):72-76. |
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| 作者姓名： | 杨媛媛 吕幼新 |
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| 作者单位： | 电子科技大学电子工程学院,成都,611731 |
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| 摘 要： | 对软件无线电接收机中数字下变频理论进行深入分析,提出了一种基于多类滤波器级联技术的DDC实现方案。采用疏状滤波器、半带滤波器和整形FIR滤波器级联实现数字下变频的抽取滤波,有效减少了乘法器和加法器需求及滤波器阶数,高效实现了数字下变频,达到了系统的设计要求。最后将该技术与传统的FIR滤波方法进行对比,进一步说明其可行性和优越性。
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| 关 键 词： | 数字下变频 积分疏状滤波器 半带滤波器 ISOP滤波器 抽取 |
Cascade Technique of Multi-Type Filters About Realization of DDC |
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| Authors: | YANG Yuan-yuan LV You-xin |
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| Affiliation: | YANG Yuan-yuan,LV You-xin(School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China) |
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| Abstract: | The theory of digital down conversion in software radio receiver is analyzed,and a scheme of realizing DDC based on cascade technique of multi-type filters is put forward.CIC(Cascaded Integrator-Comb) filters,HB(Half-Band) filters and plastic FIR filters are used to realize the decimation of DDC(Digital Down Conversion),the order of filters and the requirement of multiplicators and adders are reduced effectively.The performance demanding of DDC is accomplished efficiently.Finally,the feasibility and superio... |
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| Keywords: | digital down conversion(DDC) cascaded integrator-comb filter half-band filter interpolated second-order polynomial filter decimation |
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