基于DSP的快速频谱细化分析的方法

Fast Spectrum Refinement Analysis Method based on DSP

在低通采样的频谱分析仪中,DSP需要进行大数据量的频谱分析,存在工作时间过长、运算复杂的问题。使用FFT分解的方法,充分利用DSP的内部存储器资源,将大量数据的FFT运算分析分解成为多次小量数据的FFT和DFT分析,得到了设置频率范围内的频谱分析数据,减少了频谱分析的数据量和运算量,缩短了DSP处理时间,提高了频谱分析仪的工作效率。

In the spectrum analyzer with low pass sampling,DSP needs to analyze the spectrum of large amount of data,which has the problems of long working time and complicated operation. In this article,FFT decomposition method is used to make full use of the internal memory resources of DSP,and FFT operation analysis of large amount of data is decomposed into FFT and DFT analysis of a small amount of data. The spectrum analysis data in the frequency range is obtained,which reduces the amount of data and calculation,shortens the DSP processing time and improves the work efficiency of the spectrum analyzer.