基于软件化雷达的数字波束处理方法

Digital Beam Processing Method Based on Software Defined Radar

采用二维平面阵数字波束形成方法时,需利用共轭梯度(CG)算法的迭代求解权值。由于不同的雷达应用场景所需的导向矢量不尽相同,使用该处理算法代码量过大,可扩展性不强。针对该问题,提出了一种基于软件化雷达的数字波束处理方法。通过现场可编程门阵列(FPGA)软件修改导向矢量对不同雷达场景进行数字波束处理,对输入通道数据补相、极化、加权及布相,并选择相应功能模式输出波束数据,完成数字波束形成。

When the two-dimensional planar array digital beamforming method is used,it is necessa-ry to use the conjugate gradient(CG)algorithm to solve the weights iteratively.Due to the differ-ent guide vectors required for different radar application scenarios,the amount of code used by this processing algorithm is too large and the extendibility is not strong.To solve this problem,a digital beam processing method based on software defined radar is proposed.Through the field program-mable gate array(FPGA)software,the guide vector is modified to perform digital beam processing for different radar scenes,and the phase supplement,polarization,weighting&phase distribution of input channel data are performed,and the corresponding functional mode is selected to output the beam data,thereby digital beamforming will be completed.