实用宽带高分辨率声表面波线性调频变换功率谱仪

A practical spectrometer based on SAW chirp z transform

声表面波(SAW)线性调频变换(CZT)技术是实时傅利叶变换处理的主要支持性技术之一。其实用化研究始于七十年代末。本文将介绍作者以射电天文望远镜为直接应用对象,所研制的SKP-1型宽带高分辨率SAW功率谱仪。其中着重介绍一种扩展CZT变换器固有50％有效工作周期的新方法。并给出谱仪实验室测量的详细性能。

SAW chirp z transform processors are widely accepted as a promising supporting technique for real time Fourier transform signal processing It has come into use since the end of 1970's. In this paper a practical SAW CZT spectrum analyzer with a broadband and a high frequency re-solution designed for use in radio astronomy is discussed. It's performances and specifications tested under laboratory conditions as well as a method to extend the duty cycle of SAW CZT processor from 50% to 100% are presented.