摘要
根据"猫眼"目标和漫反射目标的回波能量公式及高斯概率分布,推导了APD用于"猫眼"目标探测的虚警概率和探测概率公式,以此为基础,通过数值分析的方法研究了"猫眼"目标离焦量、探测距离对APD信噪比的影响;仿真了阈噪比对APD虚警概率的影响曲线,选定了合适的阈噪比。在选定阈噪比的基础上,分析了不同探测阈值下APD的探测性能,同时研究了离焦量、激光发散角对探测概率的影响。结果表明:APD的信噪比和探测概率随离焦量和探测距离的增大而减小,压缩激光发散角可提高APD探测概率,对不同距离上的目标进行探测时选择不同的探测阈值可有效提高APD探测性能。
Based on the reflected wave power formula of ＂ cat eye＂ target and diffused targets and Gaussian probability distribution, the detection probability and false alarm probability of the detection system using APD were educed. Then the influence of factors such as focal shift and detection distance for the signal to noise ratio （SNR） of APD was analyzed. The graph of false alarm probability and TNR was simulated, and appropriate TNR was selected. The detection performance of APD based on different detection thresholds was analyzed, and the impact of focal shift and laser disperse angle on the detection probability was studied. The results demonstrate that the SNR and detection probability will attenuate as focal shift and detection distance increased~ the APD detection probability will be increased by reducing the divergent angle. The detection performance of APD will be enhanced by selecting different detection threshold when detecting ＂cat eye＂ target on different distances.
出处
《半导体光电》
CAS
CSCD
北大核心
2011年第6期869-873,共5页
Semiconductor Optoelectronics
