Patent ID: 7027496
Filing Date: 2006-04-11
Classification: H04B,H04L,H04W

Abstract:
1. A method to estimate a signal-to-noise ratio (SNR) of a signal, compnsing: sampling the signal; correlating and filtering the sampled signal; symbol combining the correlated and filtered signal; estimating pilot channel and noise power to obtain a combined pilot power and noise variance estimate; inputting the symbol combined signal and the pilot power and noise variance estimate to an (Eb/Nt) estimator and subtracting a noise term, multiplied by a constant, from the combined signal power; and computing a ratio of the unbiased signal power to the noise power to obtain an unbiased (Eb/Nt) estimate, to determine a status of a received signal for making at least one discontinuos transmission (DTX) decision within a communication terminal as to whether a frame was a transmitted frame or an unstransmitted frame.