基于H^∞滤波的阵列互耦及通道幅相误差联合自校正算法

A Joint Array Self-Calibration Algorithm Based on H^∞ Filter in the Presence of Gain/Phase Errors and Mutual Coupling

针对非理想均匀阵列中存在的模型误差（通道幅相不一致及阵元间互耦）提出一种联合自校正算法。该算法利用鲁棒控制理论中的H^∞滤波方法,在阵列模型误差较大时为对初始值要求严格的交替迭代寻优技术提供稳健的DOA估计,在校正阵列模型误差的同时得到更精确的DOA估计值。理论分析和仿真结果均表明该算法增大了自校正技术对阵列模型误差的校正范围,具有良好的工程应用前景。

A joint nonideal uniform array＇ s self-calibration algorithm that can calibrate the array model errors （gain and phase uncertainties and sensor mutual coupling） is proposed. Based on the H^∞ filtering technique, which was introduced in robust control theory,the more robust estimation of DOA （ Direction of Arrival） can be achieved in this algorithm. Combined with the alternate iterative optimal technique,which has strict limit to initial value, this algorithm can precisely calibrate array larger model errors and get exact estimation of DOA simultaneously. The theoretical analysis and simulation results not only confirm this algorithm extends the self-calibration technique＇ s limits of array larger model errors, but also show its good potential in applications.