基于免疫算法的FIR数字滤波器优化设计

Design of FIR Digital Filters Based on Immune Algorithm

针对频率采样技术设计FIR滤波器的特点,推导出阻带衰减关于滤波器阶数和过渡带采样值的优化函数,并具体设计了免疫算法对其优化求解。仿真验证表明,较之以往方法,其效果较好,对基于频率采样技术的FIR滤波器优化设计具有重要意义。

This paper deduces the function of stopband attenuation on the order of filter and the sampled value of transition band, according to the features of designing FIR filters with frequency sampling technique, and optimizes it with immune algorithm. Simulation result shows that this method is better than other methods adopted before, and this is beneficial to design FIR filters based on frequency sampling technique.