详细研究了复噪声中正弦参数估计的统计性能，给出了模型中各参数估计的克拉美罗限；
The statistical capability of estimate of sinusoidal parameter in complex noise is researched in detail and the corresponding CRLB is given.
广义相关是解决时延估计的重要技术措施，采用极大似然加权进行时延估计时方差可达到克拉美罗界。
Generalized cross correlation is an important technical measure to solve time delay estimation problem. Time delay estimation variance can reach CRLB by using ML weighting.
另外最大似然估计的一个优点是用于不确定度计算的克拉美-罗下限值更易于获得。
In addition, it has the advantage that the Cramer-Rao lower bound can be used as an uncertainty bound on the estimation.
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