Performance predictions for coherent and incoherent processing techniques of time delay estimation
Performance predictions for coherent and incoherent processing techniques of time delay estimation
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DOI：
10.1109/tassp.1983.1164206
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
K. Scarbrough;R. Tremblay;G. Carter
中科院分区：
文献类型：
--
作者：
K. Scarbrough;R. Tremblay;G. Carter
在最近的工作中，相关器的性能估计（CPE）已被开发，它给出了一个更准确的估计性能比克拉美罗下限（CRLB）的互相关技术的时间延迟估计（TDE）。在这里考虑了最近这项工作的影响。特别地，CPE和CRLB的行为被认为是观测时间和信噪比（SNR）的函数。这种行为的影响被认为是相关的TDE相干和非相干信号处理方法。结果表明，在低信噪比，相干处理产生显着的增益在性能上超过非相干处理。仿真结果证实了这些性能预测。
In recent work, a correlator performance estimate (CPE) has been developed which gives a more accurate estimate of performance than the Cramer-Rao lower bound (CRLB) for the cross-correlation technique for time delay estimation (TDE). The impact of this recent work is considered here. In particular, the behavior of the CPE and CRLB is considered as a function of the observation time and the signal-to-noise ratio (SNR). The implications of this behavior are considered as related to coherent and incoherent signal processing methods for TDE. It is shown that, at low SNR, coherent processing yields significant gains in performance over incoherent processing. Simulation results are presented to corroborate these performance predictions.