基于俯仰维信息的天基双基地雷达正交投影STAP算法

摘要

分析了天基双基地雷达的地杂波距离模糊引起的杂波多普勒展宽特性.针对天基双基地雷达距离模糊杂波的抑制问题,提出了一种基于俯仰维信息的正交投影(OP)空时自适应处理(STAP)算法.该算法利用杂波空间导向矢量中的俯仰信息来构造正交投影矩阵,然后对投影后的空时数据进行空时自适应处理.结果表明,基于俯仰维信息的正交投影变换实现了对待检测距离单元数据的有效提取,降低了距离模糊杂波对STAP性能的影响.%The Doppler broadening characteristic caused by range ambiguous clutter was analyzed for space-based bistatic radar. To suppress the range ambiguous clutter, an Orthogonal Projection ( OP) Space-Time Adaptive Processing (STAP) algorithm was presented based on the elevation information. In the proposed algorithm, the OP matrix was construed by the elevation information in the space steering vector. Then, the projected space-time data were processed via the STAP. Simulation indicated that the data under detection was extracted from the range ambiguous data effectively by using the OP transformation based on elevation information, and the influence of range ambiguous clutter to the performance of STAP was reduced greatly.