微弱信号在数字信号处理器上的检测与实现

Detection and realization of weak signal on DSP

本文首先介绍了微弱信号的检测理论,包括自相关检测和互相关检测。虽然模拟电路对于信号处理的实现比较简单,但是对于容易被噪声掩盖的微弱的有用信号的检测并不是十分理想,而对于数字电路来说,设计和实现方式上相对于模拟电路的实现比较复杂,但是对于提取微弱信号效果较为明显,容易在噪声干扰下检测出微弱信号。针对模拟电路处理微弱信号存在的问题,本文提出了采用数字电路进行微弱信号处理的过程以及在DSP上的软件、硬件的数字实现过程。

The article firstly introduces the theoretics of detection based on weak signal, including self- interrelated detection and interrelated detection. Although it is easy to realize digital signal processing system, weak signal is detected by this system difficultly. Contrast to digital circuit, it is complex to re- alize the process, but it has advantage for weak signal. Based on the shortcomings of simulative circuit in processing weak signal, a new digital signal processing system base on DSP is designed, including realization of software and hardware process.