一般阵列误差情况下信号二维方向角和多普勒频率的联合估计

Joint Estimation of 2D Angle and Doppler Frequency for Signals with General Array Error

针对平面阵列 ,推导出基于一般阵列误差模型的信号时空DOA矩阵 ,采用总体最小二乘法 (TLS)估计出多个信号的方位角、俯仰角和多普勒频率 ,解决了大多数估计算法的性能因阵列误差而严重下降和“频率兼并”问题。此算法对噪声不敏感 ,不需进行谱峰搜索。仿真结果表明了此算法的有效性。

We proposed a method of estimating 2D angle and Doppler frequency of signal with the general array error model. The space-time DOA matrix of signals was deduced. The azimuths, elevations and Doppler frequencies of signals with unknown array manifold due to uncertainties of array elements were calculated by total least squares (TLS). The method can resolve the problems such as the performance of estimate algorithm is greatly decreased due to the general array error, and the 2D angle of multiple signals with the same Doppler frequency can not be estimated. The Gaussian noise in sources is efficiently suppressed. The estimations of azimuths, elevations and Doppler frequencies are automatically paired without spectral search. Simulations are presented to show the capabilities of this method.