Direction of Arrival Estimation for Coherent Signal in Impulsive Noise

In this paper, we present a novel direction of arrival (DOA) estimation method for coherent signals under impulse noise environment, which is modelled by the symmetric α stable (SαS) distribution. The main idea of our work is utilizing a novel pre-processing technique to eliminate the impulse of the noise, so that the common de-coherent techniques based on the second-order-statistics could be adopted. The main idea of our method is to set up a proper threshold value for the array data, so that the most part of the impulse can be cut out. By researching on the distribution feature and amplitude property of the SαS noise, the threshold is given out. By modifying the amplitude of the array received data based on the threshold value, the impulsive noise with huge amplitude can be weaken effectively. Simulation results illustrate that our method is effective and has good performance.