Patent ID: 6760370
Filing Date: 2004-07-06
Classification: H04B,H04L

Abstract:
A method for estimating signal-to-noise (SNR) ratio of a sequence of received BPSK communication symbols rk (k=1 to N) using a low bias method comprising:a) selecting an initial estimate of signal-to-noise ratio SNR0; b) calculating an initial amplitude value A0 and noise variance value &sgr;0 based on the estimate SNR0; c) calculating a subsequent amplitude value A1 based on probability density; d) calculating a subsequent noise variance value &sgr;1 based on amplitude value A1; e) calculating a subsequent signal-to-noise ratio SNR1 based on A1 and &sgr;1; f) subtracting SNR0 from SNR1 to obtain a calculated resolution value; and g) adjusting SNR0 and repeating steps (b) through (f) until the calculated resolution value is equal to a predetermined acceptable value.