【摘要】 高速FIR滤波器的4路多相实现结构工作的采样速率是单路串行实现结构的4倍,针对4路多相信号半带抽取滤波器直接实现结构计算复杂度大这一问题,提出了一种4路多相信号半带抽取滤波器的优化实现结构。推导得到4路多相信号FIR滤波器优化实现结构;在此基础上,分析不同输出组合的计算复杂度,给出4路多相信号半带抽取滤波器的优化实现结构。对于4路多相信号半带抽取滤波器,仿真结果表明,提出的优化实现结构的计算复杂度约为直接实现结构的75%,验证了其优越性。更多还原

【Abstract】 Compared with the serial FIR filter,the sampling frequency of the implementation structure of the 4-channel polyphase decomposition of high-speed FIR filter is increased by a factor of 4.Aiming at the problem that the implementation structure of the direct4-channel polyphase halfband decimation filter has enormous computational complexity,an optimized implementation structure of 4-channel polyphase halfband decimation filter is proposed.Firstly,the optimized implementation structure of the 4-channel polyphase FIR filter obtained.And then based on this,the optimized implementation structure of 4-channel polyphase halfband decimation filter is derived.Finally,the computer simulation shows the superiority of the proposed implementation structure for the 4-channel polyphase decomposition filter,which is verified by the fact that the computational complexity of the proposed implementation structure is 75% of the structure before optimization.更多还原