摘要
为了补偿级联积分梳状(CIC)滤波器固有的通带衰减,提出在CIC滤波器之前插入脉冲成形滤波器(PSF)进行预补偿的新算法,该算法不增加硬件复杂度.以多速率正交调制器为例分析了补偿后CIC滤波器的性能,给出了滤波器系统的频率响应.仿真结果表明该补偿算法实用,有效.
For pre-compensating the passband droop of cascaded integrator-comb （CIC） filter, a novel method and its implementation algorithm are proposed, which uses the pulse shaping filter （PSF） while brings no additional hardware complexity. Then, an application example is given of a multi-rate quadrature modulator with a compensated CIC filter, and the frequency response of the whole system is analyzed. Moreover, the quality of the modulated signals is evaluated by simulation. The simulation results verify the validity of the proposed compensation method and its practicability of the compensated CIC filter.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2006年第4期345-348,共4页
Transactions of Beijing Institute of Technology
基金
国家部委预研项目(02001101030501)
关键词
CIC滤波器
预补偿
正交调制
cascaded integrator-comb filter
pre-compensation
quadrature modulator
