增益幅度不同时信号二维方向角和多普勒频率的盲估计

 在各阵元增益幅度不一致的条件下,提出了一种起伏目标的二维方向角和多普勒频率盲估计的新方法。此方法在各阵元增益幅度不一致的条件下,仍可获得很好的估计性能,并能应用于各个信号的频率相同的场合。且具有对噪声不敏感,不需进行谱峰搜索,适用范围广等特点。仿真结果表明了此算法的有效性。

BLIND ESTIMATION OF 2D ANGLE AND DOPPLER FREQUENCY FOR SIGNALS WITH SENSOR GAIN UNCERTAINTIES

A new blind estimate of 2D angle and Doppler frequency for fluctuating target signals was proposed with sensor gain uncertainties. The model of fluctuating target signals incident was on an L shaped uniform linear array, and the space time DOA matrix of signals was deduced. The azimuths, elevations and Doppler frequencies of the fluctuating target signals with unknown array manifold due to uncertainties of array elements were calculated. When the gain of array elements is not accordant, the performance of this method also is better. This method can completely resolve the 2D angle estimate of multiple narrow band signals even with the same Doppler frequency each other. The Gaussian noises in signal sources are efficiently suppressed. This method is computationally efficient with a comparatively high resolution, and the estimations of azimuths, elevations and Doppler frequencies are automatically paired without spectral search. Simulations were presented to show the capabilities of this method.