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现有冲击噪声背景下的波达方向(DOA)估计方法都是基于分数低阶统计量提出的,其求解比传统的二阶矩方法复杂.为此,根据冲击噪声的幅值特性,通过对阵列接收数据进行去冲击预处理,提出了一种冲击噪声背景下的DOA估计新方法.该方法首先估计出阵列接收数据中信号成分的幅值上限,然后对阵列接收数据进行去冲击处理,从而利用传统的二阶矩方法来实现DOA估计.理论分析和仿真实验结果表明,所提方法无需求解分数低阶统计量,计算简便,估计精度高,且在强冲击噪声环境下仍然具有良好的估计性能.
The DOA estimation method based on the existing impulsive noises is based on the fractional-order low-order statistics, which is more complicated than the traditional second-order moment method. Therefore, according to the impulsive noise amplitude characteristics, Array receiving data, a new method of DOA estimation in the background of impulsive noise is proposed. This method first estimates the upper limit of the amplitude of the signal components in the received data and then de-strikes the received data to The traditional second-moment method is used to realize the DOA estimation.The theoretical analysis and simulation results show that the proposed method does not need to solve the low-order statistic of fractional scores, and the calculation is simple, the estimation accuracy is high and it still has a good estimation under strong impact noise environment performance.