Patent Document ID: 8223862
Application ID: 12588585
Patent Flag: 1

Claim One:
1. An OFDM inter-carrier interference cancellation method operable within a receiver of an OFDM communication system, the method comprising the steps of: receiving a signal, the signal comprising a cyclic prefix, pilot subcarriers, and modulated subcarriers representing an OFDM symbol, the OFDM symbol containing a stream of transmitted data bits; removing the cyclic prefix from the received signal; applying the received signal to a Fast Fourier Transform (FFT) in order to recover the modulated values of all of the subcarriers; providing a channel estimation based on the pilot subcarriers; providing an estimate of Doppler frequency and sampling time period; computing an Eigenvalue Decomposition (EVD) based on the estimate of the Doppler frequency and the sampling time period; equalizing the channel based on said channel estimation and the EVD computation, the channel equalization removing any detected inter-carrier interference (ICI), leaving the OFDM symbol free of ICI; demodulating the ICI-free OFDM symbol; removing the pilot subcarriers; and decoding the resulting signal to obtain the transmitted data bits.