Patent ID: 7769094

Claim:
A method in an Orthogonal Frequency Division Multiplexing (OFDM) radio receiver for reducing the impact of interference from an intermittent interfering signal received during reception of an OFDM symbol, wherein the OFDM symbol includes a guard interval (GI) portion, a middle portion, and a last portion identical to the GI portion, said method comprising: determining which portion of the OFDM symbol is contemporaneous with the interfering signal; and time-shifting a fast Fourier transform (FFT) window in the receiver to minimize or eliminate FFT processing of samples of the OFDM symbol that are contemporaneous with the interfering signal, thereby minimizing the impact of the interfering signal, wherein the OFDM receiver receives an OFDM signal comprising a plurality of consecutive OFDM symbols, and receives a plurality of intermittent interfering signals which are not time-synchronized with the OFDM symbols, wherein the method further comprises: analyzing each OFDM symbol to determine which portion of each OFDM symbol, if any, is contemporaneous with the interfering signal; and time-shifting the FFT window in the receiver on a per-symbol basis, as needed, to minimize or eliminate FFT processing of samples of each OFDM symbol that are contemporaneous with the interfering signal.