A quantitative comparison of generalized correlator window functions in presence of strong spectral peak for spatially separated sources

Simulation results are presented to compare the effectiveness of various windowing functions for the generalized correlator when a strong spectral peak or sinusoid is present. In this case, the time delay of the desired source and of the interfering sinusoid are allowed to be different. The results show that all windows except HBII and SCOT deteriorate markedly. These two windows remain robust to the ambiguity problems presented by the sinusoid, independent of whether the spectral peak is included in the signal spectrum or in the noise spectrum. Also, window HBII performs better than SCOT in terms of probability of correct detection, variance of time delay, and SNR threshold.