Overcomplete time delay estimation using multi-Gaussian fitting method

In overcomplete time delay estimation or blind source separation, we always need to find the cluster centers which corresponds to the mixing matrix. In order to estimate the cluster centers accurately, we proposed multi-Gaussian curve fitting (MGCF) method, which is very useful in cluster center estimation and other curvefitting circumstances. As a concrete example, we use MGCF to accurately estimate the cluster center of an underdetermined mixing models, which are then used to estimate the relative time delays. Simulations show that MGCF is accurate and robust.