CAJ | 학술논문

针对单快拍情况下大多数空间谱估计方法失效的问题，该文提出一种直接利用阵列接收信号重排构造伪协方差矩阵的模型。理论分析表明，该模型更加灵活且更具一般性，已有的伪协方差矩阵构造方法可以统一在该模型下。在此基础上结合波束形成的思想，进一步提出一种基于阵列接收信号加权求和的伪协方差矩阵构造方法，该方法综合考虑了信噪比及阵列自由度两方面因素的影响，可在一定程度上提升估计性能。理论分析和仿真验证说明了该方法及模型的正确性和有效性。
침대단쾌박정황하대다수공간보고계방법실효적문제，해문제출일충직접이용진렬접수신호중배구조위협방차구진적모형。이론분석표명，해모형경가령활차경구일반성，이유적위협방차구진구조방법가이통일재해모형하。재차기출상결합파속형성적사상，진일보제출일충기우진렬접수신호가권구화적위협방차구진구조방법，해방법종합고필료신조비급진렬자유도량방면인소적영향，가재일정정도상제승고계성능。이론분석화방진험증설명료해방법급모형적정학성화유효성。
Most of spatial spectrum estimation methods fail when there is only one valid snapshot. To deal with this issue, a pseudo covariance matrix construction model utilizing array receiving signal is proposed. Theoretical analysis shows that the presented model, which consists in the existing methods, is more flexible and general. Combining with beam forming idea, a method based on weighted summarizing is proposed, which considers both the affections of signal-to-noise ratio and array freedom. Estimation performance can be enhanced in some degree. Theoretical analysis and simulation results verify the correctness and effectiveness of the proposed method and model.