Cain Stephen, Richmond Richard, Armstrong Ernest
Department of Electrical Engineering, the Air Force Institute of Technology, 2950 Hobson Way, Building 640 Wright-Patterson Air Force Base, Ohio 45433-7765, USA.
Appl Opt. 2006 Aug 20;45(24):6154-62. doi: 10.1364/ao.45.006154.
A Cramer-Rao lower bound on the range accuracy obtainable by a Flash light detection and ranging (LADAR) system receiving a return from a single surface in the instantaneous field of view of each detector is developed and verified with experimental data. The bound is compared to the performance of a new algorithm and that of a matched filter receiver by using both simulated and measured LADAR data. The simulated data are used to show that the estimator is nearly unbiased and efficient for systems that match the negative paraboloid model used in its derivation. It is found that the achievable range accuracy for the LADAR system and for the target geometry used to collect the measured data is of the order of 2.5 in. while the bound predicts a range accuracy limit of approximately 0.6 in.
推导了一种用于闪光灯探测与测距（LADAR）系统的克拉美-罗下界，该系统在每个探测器的瞬时视场内接收来自单个表面的回波，并通过实验数据进行了验证。通过使用模拟和实测的LADAR数据，将该下界与一种新算法以及匹配滤波器接收器的性能进行了比较。模拟数据用于表明，对于与推导中使用的负抛物面模型相匹配的系统，该估计器几乎是无偏且有效的。结果发现，对于LADAR系统以及用于收集实测数据的目标几何形状，可实现的距离精度约为2.5英寸，而该下界预测的距离精度极限约为0.6英寸。
