基于FPGA的激光雷达恒虚警率控制技术研究

STUDY OF CONSTANT FALSE ALARM RATE CONTROLLING TECHNIQUE BASED ON FPGA IN LIDAR

研究了激光雷达中的雪崩光电二极管恒虚警率控制技术,提出了一种基于FPGA的恒虚警率控制电路,通过噪声检测能够有效地根据背景辐射进行自适应调整,保持恒定的虚警率,并使雪崩二极管处于最佳工作偏压.实验结果表明其良好地实现了恒虚警率控制.

The constant false alarm rate （CFAR） controlling technique of avalanche photo diode （ APD ） applied in Lidar was studied, and a CFAR controlling circuit based on FPGA was described. Our results show that it is capable of self-adjusting according to the background radiation by means of noise detection, and it can also maintain constant FAR and make the APD in the optimum state of bias voltage. Experimental results indicate that this circuit can well realize CFAR controlling.