A New Method for DOA Estimation in the Presence of Non-uniform Noise

This paper investigates the problem of estimating the direction of arrival in non-uniform sensor noise. To this aim, The covariance matrix of the noise is estimated, and its effect is attenuated to obtain an improved covariance matrix of the observations. So, the problem can be solved using common subspace based methods for DOA estimation under uniform white noise assumption like the MUSIC algorithm. Simulation results confirm that the proposed method outperforms other existing subspace based methods when RMSE is utilized as the accuracy metric.