基于DSP的取样数字式平均器的设计与实现

Design and Realization of Sampling Digital Multipoint Average of Signal with DSP

介绍了微弱信号检测的背景和应用,提出以数字式多点平均器的算法来检测微弱信号,并从理论上进行了分析和论证。这种方法的核心是用累加平均来消除随机的噪声,增强确定的有用信号,改善被检测信号的信噪比,恢复出淹没于强背景噪声中的微弱信号,从而实现微弱信号检测。设计出了以TMS320C54x为核心处理器的数据处理系统,利用DSP实现时域信号的取样积累数字式平均算法,这种系统能很方便地嵌入各种仪器中,用途十分广泛。

This paper presents the background and applications of detection of weak signal, It is put forward a digital multipoint average method of restoring signal covered with noise and the method has proved most useful in theory o The core of the method is that our making full use of accumulation average of signal, eliminating random noise, enhancing invariable useful signal, improving Signalto-Noise Rate ,acquiring weak signal which shielded by vast powerful noise ,achieving weak signal detection o This paper presents the data acquisition system which employing the processor of TMS320C54x detecting weak signal. The designing of front hardware is optimized to insure the precision of acquiring data. The system adopt DSP accomplishing the arithmetic of sampling accumulate average of signal, and the system can be easily embedded in various instruments and there are extensive applications.