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升采样率处理是某些数字式声呐的必不可少的预处理.本文给出整倍数升采样率运算的基本原理和理论结果。指出,升采样率处理的好坏不仅取决于窗函数的长度,也还和输入信号的功率谱密度有关.为实现升采样率处理,可以采用几种不同方法,文中指出用输入样本补零和窗函数卷积的方法是有效的.在数字计算机上的模拟取得了良好的结果.这种方法便于用专用数字信号处理芯片实现,并且对输入、输出采样率的选取上有很宽容的余地.
The up-sampling rate processing is an indispensable pretreatment for some digital sonars.This paper gives the basic principle and theoretical results of the integer multiple sampling rate operation. It is pointed out that the processing of up-sampling rate depends not only on the length of the window function but also on the power spectral density of the input signal.In order to realize the up-sampling rate processing, several different methods can be used. The window function convolution method is effective. The simulation on the digital computer has achieved good results. This method is easy to use special digital signal processing chip to achieve, and the input and output sampling rate of a very tolerant.