Lubnau D G
Appl Opt. 1977 Jan 1;16(1):184-6. doi: 10.1364/AO.16.000184.
The equation for the maximum likelihood estimate of target angle is derived for a conical scan tracking system when the target produces speckle and Gaussian noise is present. Operation with a direct detection receiver is assumed with the average photon flux large enough so that the discrete nature of photoelectric events may be ignored. For large average SNRs, the estimate is shown to be unbiased and the variance of the estimate limited by both the average SNR and the number of degrees of freedom of the detected field.
针对目标产生散斑且存在高斯噪声的圆锥扫描跟踪系统，推导了目标角度最大似然估计的方程。假设采用直接检测接收机进行操作，且平均光子通量足够大，从而可以忽略光电事件的离散特性。对于大平均信噪比，该估计被证明是无偏的，并且估计的方差受平均信噪比和检测场自由度数量的限制。
