软件无线电技术在通用雷达信号处理机中的应用

The Application of Software Defined Radio on General Radar Signal Processor

软件无线电概念最早是基于通信需求提出来的,而且也首先在通信领域得到应用,但软件无线电这种设计思想、新思路也完全适用于其他领域,如雷达、声纳等。本文介绍了软件无线电(SDR)的基本原理及其关键技术,针对全相参雷达的特点,提出采用雷达信号中频采样技术的实现方法,不仅使电路元器件显著减少,提高了系统的可靠性和信噪比,而且降低了相位噪声和杂散,满足了系统对雷达接收机的要求。利用软件无线电技术及其相关产品,搭建通用雷达信号处理机,最后对系统性能进行了分析和评估。

The concept of Software Defined Radio is firstly developed based on communication requirement and also used in the communication field. However, the new design idea is fully the same with other fields, for example, radar, sonar and so on. In this paper the basic principles and key techniques of SDR are introduced. In allusion to the peculiarity of co-herent radar, we present a method that radar signal is sampled in intermediate frequency. It not only provides better reliability and rate of signal and noise, but also improves phase noise and spurious. SDR technique and correlative products are used to construct a general radar signal processor. Finally, the system performance is analysed.