CAJ | 학술논문

针对相干干扰环境下的常规Capon波束形成容易受期望信号导向矢量和其他阵列响应失配影响，提出了一种基于空间平滑的的最差性能最优稳健波束形成算法。该方法以均匀线阵为基础，采用空间平滑技术对相干的阵列接受信号进行预处理，再采用改进的稳健波束形成算法处理各种失配，有效地解决波束形成器的性能急剧下降的问题，使输出信干噪比得到很大的提高，同时减小了主峰偏移，且具有较低的旁瓣电平。最后仿真分析验证了所提算法的正确性和有效性，通过对各种各样失配进行相应的约束，使得稳健性得到进一步的提高。
침대상간간우배경하적상규Capon파속형성용역수기망신호도향시량화기타진렬향응실배영향，제출료일충기우공간평활적적최차성능최우은건파속형성산법。해방법이균균선진위기출，채용공간평활기술대상간적진렬접수신호진행예처리，재채용개진적은건파속형성산법처리각충실배，유효지해결파속형성기적성능급극하강적문제，사수출신간조비득도흔대적제고，동시감소료주봉편이，차구유교저적방판전평。최후방진분석험증료소제산법적정학성화유효성，통과대각충각양실배진행상응적약속，사득은건성득도진일보적제고。
Since standard Capon beamforming is susceptible to the steering vector mismatches of the signal of inter-est and other array response mismatches in a coherent signal environment, a beamforming algorithm using worse-case performance optimization based on the spatial-smoothing technique is addressed. The new method is based on uniform linear array, the received coherent array signals are preprocessed by adopting forward spatial smoothing technique. Then, improved robust beamforming algorithm is used to deal with all kinds of mismatches. The sharp decline of the beamforming performance is resolved effectively and the signal to interference plus noise ratio is evi-dently improved. This algorithm can diminish the deviation of mainlobe and suppress the high sidelode to a large de-gree. At last, the simulation result demonstrates the new method is right and available. By dealing with all kinds of mismatches, the robustness can be further upgraded.