非理想噪声环境和测量条件下的阵列失效阵元高效压缩感知方法研究

To amend the drawback of existing failed array diagnosis algorithm including consideration of only Gaussian noise background, ignorance of array error and high requirement on measurements, this project aims to develop a highly efficient compressed sensing method for failed sensor diagnosis in the non-ideal noise environment and measurement conditions by solving problems of sparse reconstruction under non-Gaussian noise background and nonlinear sparse reconstruction. Main research contents include: 1, compressed sensing method for failed array diagnosis under non-ideal noise environment; 2, compressed sensing method for failed array diagnosis in the presence of array position error, channel inconsistent, error frequency, excitation errors and array mutual coupling; 3, efficient compressed sensing method for failed array diagnosis based on field measurement power; 4, measurement parameters setting and optimization method. By fulfilling the project, array pattern disturbance model will be established. Influence mechanism of measurement parameters on the effect of performance of array failure diagnosis method will be explored. New theory and new method on sparse reconstruction under non-Gaussian noise background and nonlinear sparse reconstruction will be proposed. Overall, the project will promote further development of compressed sensing and failed array diagnosis.

本项目针对当前失效阵元诊断方法只适用于高斯噪声背景下的理想阵列故障诊断，且对测量样本数量要求较大、测量过程复杂等缺陷，拟通过解决冲击、混合噪声抑制与稀疏激励重构联合实现、阵列误差对天线方向图扰动的定量分析及互耦矩阵估计、非线性稀疏重构、测量点参数对稀疏激励重构的影响机理研究等科学问题，发展非理想噪声环境和测量条件下的失效阵元高效压缩感知方法。主要研究内容包括：一、非理想噪声环境下的失效阵元压缩感知方法；二、阵列位置误差、通道不一致性、频率误差、激励误差及阵元互耦等非理想测量条件下的失效阵元压缩感知方法；第三、基于测量场功率的失效阵元高效压缩感知方法；四、测量点参数设置及优化方法。通过上述内容的研究，发展非理想噪声环境和测量条件下失效阵元的高效压缩感知的新理论和新方法，推动压缩感知和失效阵元诊断研究的进一步发展。

本项目针对当前失效阵元诊断方法只适用于高斯噪声背景下的理想阵列故障诊断，且对测量样本数量要求较大、测量过程复杂等缺陷，拟通过解决冲击、混合噪声抑制与稀疏激励重构联合实现、阵列误差对天线方向图扰动的定量分析及互耦矩阵估计、非线性稀疏重构、测量点参数对稀疏激励重构的影响机理研究等科学问题，发展非理想噪声环境和测量条件下的失效阵元高效压缩感知方法。主要研究内容包括：一、非理想噪声环境下的失效阵元压缩感知方法；二、阵列位置误差、通道不一致性、频率误差、激励误差及阵元互耦等非理想测量条件下的失效阵元压缩感知方法；第三、基于测量场功率的失效阵元高效压缩感知方法；四、测量点参数设置及优化方法。通过上述内容的研究，发展非理想噪声环境和测量条件下失效阵元的高效压缩感知的新理论和新方法，推动压缩感知和失效阵元诊断研究的进一步发展。