Patent ID: 7532685
Filing Date: 2009-05-12
Classification: H04L,H04W

Abstract:
1. A method of tracking on-time errors in a wireless communication system, comprising: producing first and second metrics from accumulated signal samples of a received data frame; calculating a sum of the first and second metrics and a difference between the first and second metrics; using the calculated difference and sum values to determine an estimated on-time error for the received data frame and a corrected timing error control value to be applied to the on-time error; and evaluating, using a comparator, the accuracy of the estimated on-time error based on a signal quality metric to determine whether the corrected timing error control value is to be applied to the estimated on-time error or whether the timing adjustment for the on-time error is to be stopped, the signal quality metric being determined as a function of the sum and a channel quality parameter, the evaluating including, comparing the signal quality metric to a threshold to determine whether the corrected timing error control value is to be applied or whether the timing adjustment for the on-time error is to be stopped.