Moving detection technology for vehicle speed based on pseudorandom code phase modulation

Because of most traffic safety problems cause from vehicle speeding, it is urgent a new vehicle speed detector to limit the speed. A moving detection technology for vehicle speed based on pseudorandom code phase modulation was researched. Under the conidian of moving detector, the echo signals of the detected vehicles were obtained from FPGA. At the same time, the signals were analyzed by Doppler shift, the echo signals relationship between the vehicle speed and distance were obtained. Experiments show that the method to achieve the moving vehicle speed has good real-time and high precision.