Patent ID: 8576936
Filing Date: 2013-11-05
Classification: H04L

Abstract:
1. A method of communicating wirelessly comprising: creating a plurality of sub-carrier data signals by quadrature amplitude modulating data onto a plurality of sub-carrier frequencies spaced apart by a sub-carrier frequency spacing interval; converting the plurality of sub-carrier data signals to the frequency domain to create a plurality of frequency bin signals; in the frequency domain, adding pilot symbols at equidistant time points within the plurality of sub-carrier data signals so that each pilot symbol pattern exclusively comprises during a given time period converting the weighted frequency bin signals back to the time domain; frequency shifting the sub-carrier data signals by one half of the sub-carrier frequency spacing interval; modulating the sub-carrier data signals onto a radio frequency carrier wave for wireless transmission; receiving the sub-carrier data signals wirelessly; frequency shifting the received sub-carrier data signals by one half of the sub-carrier frequency spacing interval in a direction opposite the direction in which the sub-carrier data signals were previously shifted; and determining a phase difference of the channel response of adjacent sub-carriers using in combination said pilot bits in said first and second sub-carrier; phase equalizing the received sub-carrier data signals based on said phase difference.