ZFFT算法的DSP实现

DSP Implementation of ZFFT Algorithm

对信号进行频谱分析时,为了提高被测信号的频率分辨率、减少硬件系统的存储空间和计算量,采用基于复解析带通滤波器的ZFFT算法。该文讨论了ZFFT算法的原理,通过构造复解析带通滤波器——选抽滤波(一级选抽或二级选抽)——移频——FFT这样一个流程,在TI公司的TMS320DM6437上实现了ZFFT算法,从而对分析频谱进行了细化。

In order to increase the frequency resolution,minimize the storage space and computations of hardware system,this paper adopted ZFFT algorithm based on complex analytic band-pass filter.Paper discussed the principle of the ZFFT algorithm.By constructing a complex analytic band-pass filter-selected pumping and filtering（one or two）-frequency shift-FFT,ZFFT algorithm is implemented on TMS320DM6437,that the spectrum to be analyzed is detailed.