A Study on Interference Mitigation Method between Automotive Radars
With the development of automatic driving technology,millimeter wave radar has become a key sensor of automatic driv-ing.Due to the increase of the number of vehicular radars,mutual interference between radars is inevitable.Interference may lead to a decrease in radar detection performance,resulting in missed detections and false alarms.In order to solve the problems caused by interference,an interference suppression method combining empirical mode decomposition and Kalman filter in time-frequency domain is adopted in this paper.Firstly,the time domain interference signal is converted to the time-frequency domain through short-time Fourier transform,and then empirical mode decomposition is conducted on the time-frequency domain signal.The inter-ference part in the interference dominated intrinsic mode function is set to zero,and the interference zeroed intrinsic mode is added to the target signal dominated intrinsic mode.Finally,the signal is reconstructed using Kalman filtering.The experimental results show that the proposed method can not only reduce the noise in the frequency domain,but also improve the signal-to-noise ratio of the target and increase the probability of target detection.
万方数据
维普
