Patent ID: 8867675
Filing Date: 2014-10-21
Classification: H04L

Abstract:
1. A method for estimating a carrier frequency offset (CFO) between a transmitting device and a receiving device, the method comprising: receiving, at the receiving device, a data unit from the transmitting device, wherein the data unit includes a periodic sequence; generating, at the receiving device, an initial phase shift value of a phase shift between adjacent periods of the periodic sequence; performing, at the receiving device, a plurality of cross-correlations using at least one period of the periodic sequence to generate a plurality of cross-correlation results, wherein each cross-correlation is performed using one of a plurality of possible actual phase shift values; and selecting, at the receiving device and based on the plurality of cross-correlation results, an actual phase shift value from the plurality of possible actual phase shift values; and generating, at the receiving device, an estimate of the CFO based at least in part on one of i) the initial phase shift value or ii) the actual phase shift value.