Patent ID: 8064528
Filing Date: 2011-11-22
Classification: H04B,H04J,H04L

Abstract:
1. A method comprising: forming, by a wireless communication device, two or more blocks of symbols by inserting training symbols within each of two or more blocks of information-bearing symbols; applying, by the wireless communication device, a hopping code to each of the two or more blocks of symbols to insert a null subcarrier at a different position within each of the two or more blocks of symbols; and outputting, by the wireless communication device, a wireless transmission signal in accordance with the two or more blocks of symbols, wherein the hopping code is applied to insert the null subcarriers at different positions in the two or more blocks of symbols such that a second wireless communication device is operable to receive a wireless signal from the outputted wireless transmission signal and to estimate a carrier frequency offset of the received wireless signal based on the positions of the null subcarriers.