CAJ | 학술논문

提出一种机载雷达杂波抑制的级联降维空时自适应算法，即，先对全空时两维接收数据进行预滤波处理，将杂波局域化，降低杂波自由度；然后对预处理输出的信号的相关矩阵进行子阵划分，求解低维权向量，进一步降低运算量和采样要求。理论分析和实验仿真结果表明，所提算法具有良好的收敛性能和杂波抑制能力，并且对于阵元随机幅相误差和杂波起伏具有很好的容差能力。基于实测数据的实验验证了算法的有效性和稳健性。
제출일충궤재뢰체잡파억제적급련강유공시자괄응산법，즉，선대전공시량유접수수거진행예려파처리，장잡파국역화，강저잡파자유도；연후대예처리수출적신호적상관구진진행자진화분，구해저유권향량，진일보강저운산량화채양요구。이론분석화실험방진결과표명，소제산법구유량호적수렴성능화잡파억제능력，병차대우진원수궤폭상오차화잡파기복구유흔호적용차능력。기우실측수거적실험험증료산법적유효성화은건성。
A two-stage dimension-reduced space-time adaptive processing (STAP)based on correlation matrix is proposed for clutter suppression and moving target detection.Firstly,to reduce the degrees of freedom of the clutter,the full dimensional space-time received data is pre-filtered.Secondly,the corre-lation matrix of output data after preprocessing is divided into submatrices,and further reduction of both the computational complexity and the training requirement is achieved by optimizing two low-dimensional weight vectors .Theoretical analysis and computer simulation results illustrate that the proposed method can obtain fast convergence and better clutter suppression performance.The method shows good robust performance with a small computational cost when there are clutter fluctuation and random amplitude and phase errors in array elements.Experiment results by using measured data demonstrate effectiveness and robustness of the proposed method.