The Performance of the Modified GCC Technique for Differential Time Delay Estimation in the Cooperative Sensor Network
Keywords:Time delay estimation, Generalized cross-correlation, Complex analytic signal
AbstractIn this paper, a modified GCC technique (or FPT) for time delay estimation (TDE) is described. A flipped parameter (FP) can be defined for any sensor and is estimated during the observation period. Unlike classical TDE methods that evaluate the cross-correlation function, FPT requires flipped correlation evaluation based on each single sensor signal. The proposed technique gives accurate results for both coherent and non-coherent signals with symmetrical spectrum around the central frequency. The use of FPT method is especially significant for distributed sensor networks. The main features of the FPT are tested in a noisy simulation environment and the results are compared with classical methods.
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