Research Of Automotive Millimeter-wave Radar Ranging System Based On FPGA

As the economy develops steadily in recent years, car ownership keeps rising, which causes serious traffic safety problems. With the needs for traffic safety, anti-collision radar technology comes up into public in time. The anti-collision radar system, which based on the frequency modulated continuous wave (FMCW) technique, can improve the driver’s alertness, so as to reduce the traffic accidents. It’s not hard to see the great social significance and bright market prospects of the technique. In view of the insufficiency in the existing system, this paper, based on the traditional FMCW radar system analysis and research, with the core of multifunctional programmable integrated chip (MAX 11043), puts forward an optimization scheme for the radar system.Firstly, this paper introduces the triangular wave system FMCW radar ranging principle, and the property and basic structure of radar. The paper then explains the traditional structure of anti-collision radar system and proposes an optimization scheme. In order to correct the series of defects like Poor stability, low precision, high false alarm rate, large volume, high power consumption, this paper also proposes an optimization scheme with 4-Channel,16-Bit, Simultaneous-Sampling ADCs, in which traditional hardware modules are replaced by chip MAX11043. Based on this scheme, anti-collision system hardware circuit is designed, which includes the high-pass filter circuit, modulation signal preprocessing module circuit, power supply module, and the connection between MAX 11043 and hardware. Part of simulation diagram is also presented. Thirdly a program, which includes MAX11043 driver module, triangle modulation wave generator module, gain amplifier module, digital filter module、the call of FFT IP core modules etc., is designed and debugged. Simulation diagram is given at the same time. Compared with traditional anti-collision system, this scheme has a lot of advantages such as higher reliability, higher precision, higher integration, and lower power consumption. The stimulation result also shows this scheme is available in the automotive anti-collision radar system based on FPGA.