| Millimeter wave vehicle radar can effectively prevent traffic accidents and play an important role in traffic safety.It has great practical significance and broad application prospects to carry out research on vehicle radar.77GHz radar based on array signal processing has the advantages of far distance,high angle resolution and high angle measurement precision.In this paper,the 77GHz vehicle millimeter wave radar array signal processing scheme is designed and verified.The main work includes:1.Based on the 77GHz millimeter wave vehicle radar,the radar parameters are designed for signal processing requirements.The selection and reason of the signal processing chip are explained,and the classical DOA estimation algorithm MUSIC algorithm is introduced as the main algorithm of array signal processing.2.In order to realize the function and performance of radar in this paper,system clock,MC_ME module,AFE module,CTE module,WGM module and SPT module are studied in detail.3.The realization and measurement of 77GHz millimeter wave radar array signal processing are completed.First,the modules of the core chip MPC5775K are configured and debugged.Then,the C algorithm is implemented and optimized for signal processing algorithm.Finally,the measured data of radar is analyzed,and the effectiveness of the signal processing algorithm is proved in this paper.4.According to the principle of noise subspace structure spectrum function based on MUSIC algorithm,the effect of noise to the MUSIC algorithm are studied respectively in different noise conditions such as different SNR,different noise type,inconsistent noise,are discussed and tested in simulation.The solutions are corresponding to the noise condition,and the simulation results verify the validity of the solutions. |
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