中文摘要：

在设计许多阵列信号处理算法以及评估其性能优劣时,都需要考虑到噪声的相关性结构.为了考察随机阵列误差对噪声相关性结构以及后续算法性能的影响,建立了在方向性噪声场中和球面各向同性噪声场中,存在随机阵元位置误差和阵元姿态误差时,声矢量阵阵列输入噪声的时空相关性结构.在此基础上,考察了这两种随机阵列误差对声矢量阵MVDR波束形成器阵增益的影响.研究结果表明,随机阵列误差会在不同程度上改变原来的噪声相关系数,由这些相关系数组成的噪声协方差矩阵的畸变度连同导向向量的失配程度决定了阵增益损失的大小.

英文摘要：

Correlation structure of noise is required for the design of most array-processing algorithms and the evaluation of their performance.In order to study the influence of random array errors on correlation structure of noise and performance of subsequent algorithms,spatial-temporal correlation of the input noise under the influence of position errors and attitude errors,when an acoustic vector-sensor array is working in a directional noise field or spherically-isotopic noise field,was proposed.Following that,the effect on an array gain of MVDR beam-forming caused by the previously mentioned random array errors was explored.The results of the research show that the correlation coefficient of noise will be changed by random array errors to a different extent.Also,the distortion degree of the noise covariance matrix constituted by a changed correlation coefficient together with the mismatch level of the steering-vector will determine the loss of the array gain.