LOW BIAS METHOD FOR ESTIMATING SMALL SIGNAL-TO-NOISE RATIO

摘要

A method (100) is described for estimating signal-to-nose ration (SNR) using a method with low bias that is effective for both positive SNRs and small to negative SNRs. The method is based on an iterative solution for the maximum likelihood estimate of the amplitude from which the SNR can be computed. The method is applicable for various modulated systems, including BPSK, QPSK, and MPSK.