FIR Filter Design based on All Phase Symmetric Frequency Sampling Method
Huang Xiaohong, Sun Jinsheng, Wang Zhaohua · 2006
All phase symmetric frequency sampling method is put forward in this paper, which can setup shift variable according to the cut-off frequency. This method exerts inverse phase-shifts on two sub-filters, constructs a compensation filter, and at last combines sub-filters with compensation filter to form the needed low-pass, band-pass filter and notch filter. The design method is simple with a specific concept, and resolves the difficult problem of controlling the cut-off frequency accurately without changing the length of the filter in the traditional window method and frequency sampling method