Abstract:

It is well known that the conventional bearing estimation method of MUSIC class shows a poor performance at low SNRs. In order to solve this problem, the paper proposes a modified SSMUSIC method by exploiting the waveform information of transmitted signals in multi-input multi-output (MIMO) system and the characteristic of array configuration. Compared with the conventional SSMUSIC, the proposed method achieves much better performance at low SNRs by applying matched filtering to the received data and performing a spatial smooth for the sample covariance matrix to reduce the standard deviation of the noise subspace. Simulation results show that under the experimental conditions, the proposed method has a lower resolution threshold and smaller RMSE than those of the SSMUSIC method.