Research On Interference Suppression Algorithm Of Millimeter-wave Automobile Anti-collision Radar

Millimeter wave automotive anti-collision radar can effectively reduce vehicle safety accidents,and the number of vehicles equipped with millimeter wave radar is increasing.Due to the same working frequency band of radars,inter radar interference will inevitably occur,which will lead to false detection and missed detection of targets,and bring great potential safety hazard to driving safety.In this paper,the problem of interference between millimeter wave automotive anti-collision radars widely existing in the current vehicle driving environment is studied.Firstly,the target echo signal model and interference signal model of millimeter wave automotive anti-collision radar are established,the influence of radar interference on target detection is analyzed,and the performance evaluation index of interference suppression algorithm of millimeter wave automotive anti-collision radar is studied.Secondly,aiming at the problems that the time domain wide-band interference detection and suppression algorithm based on threshold can not detect multiple interference and has poor detection performance for weak targets,the iterative radar wide-band interference suppression algorithm is studied and improved,and the simulation experiment is carried out.The simulation results show that the improved iterative radar wide-band interference suppression algorithm has better interference suppression effect and lower computational complexity.Thirdly,aiming at the limitation of iterative radar interference suppression algorithm in RD map,a wide-band interference suppression algorithm for RD map is proposed,and the influence of algorithm parameters on interference suppression performance is analyzed in detail.The simulation results show that the proposed wide-band interference suppression algorithm for RD map has better interference suppression effect and lower computational complexity.Finally,the radar test experiments in the actual scene are carried out to verify the wide-band interference suppression algorithm in RD map proposed in this paper,and the effectiveness of the algorithm is verified.