A high precision spectrum rectifying technique

摘要

Spectrum-analysis technology has been widely used in engineering. Round discrete spectrum or FFT spectrum of a signal can be obtained rapidly by the FFT method. In practical applications, these FFT spectrums always need to be rectified in order to obtain a better spectrum. A high precision spectrum rectifying technique, a deconvolution-based spectrum rectifying technique, is developed in this paper. The sampled signal is firstly multiplied by an adaptive window function, the zooming spectrum of discrete windowed signal is then calculated, and finally the spectrum of window function is eliminated from the zooming spectrum by deconvolution so that the rectified spectrum of the analyzed signal can be obtained. Experiments show that this rectifying technique is very effective.