数字波束形成技术(DBF)在雷达中的应用

Application of digital beam forming technique in radar

数字波束形成技术是天线波束形成原理与数字信号处理技术相结合的产物,其广泛应用于阵列信号处理领域。由于电磁工作环境的恶化和大量射频干扰的存在,在极低的信干噪比(SINR)条件下进行目标检测和信息提取十分困难。对于阵列系统,往往采用自适应数字波束形成(ADBF)技术,来抑制强干扰和方向性干扰对有用信号的影响。介绍了数字波束形成器的基本原理及其DSP的实现结构。

Digital beam forming technology comes from antenna beam forming theory and digital signal processing technology. It is widely applied in array signal processing. As the working environment of electromagnetism gets deteriorative and a great deal of jammings exist,target detection and information extraction at very low SINR are difficult. For array systems, the technique of adaptive digital beam forming （ADBF） is adopted to restrain the strong interference and directional jamming. The basic theory and the DSP implementation structure of digital beam former are studied.