基于同态滤波的窄带信号高分辨率时延估计方法研究

he time-delay estimation is an animate research branch in the signal processing field. Correlation alogrithom is one of the most common methods, but its resolution is limited by the signal bandwith. To solve this problem, homomorphic filtering is introduced into time-delay estimation. Two kinds of high resolution time-delay estimation algrithom fitting for narrowband signal are discussed, which are generalized cepstrum correlation and cepstrum correlation.The basic theory and realization approach are represented, and the capbilities are compared with that of the correlation alogrithom. The research result shows that the time-delay resolution of generalized cepstrum correlation and cepstrum correlation are higher than correlation alogrithom, and generalized cepstrum correlation pefomances better than cepstrum correlation in time-delay resolution and anti-noise capability.