Implementation of the RELAX algorithm
Zheng-She Liu, Jian Li · IEEE Transactions on Aerospace and Electronic Systems · 1998
This correspondence presents a zoom-FFT based RELAX algorithm for estimating sinusoidal parameters in the presence of unknown colored noise. The amount of computations required by this algorithm is much less than the original zero-padding FFT based RELAX. Yet the estimation performance of the new algorithm is only slightly degraded as compared with the original one.