Patent ID: 7623439

Claim:
A method for transmitting orthogonal frequency division multiplexing (OFDM) signals comprising: generating a first OFDM packet for transmission including a guard interval portion and a symbol data portion each comprised of a plurality of samples; cyclically advancing the first OFDM packet by shifting the samples in a first direction an amount less than a sample duration of the guard interval portion to generate a shifted version of the first OFDM packet for transmission in which at least a non-zero number of the samples from the symbol data portion of the first OFDM packet are shifted into the guard interval portion of the shifted version and a same non-zero number of samples from the guard interval portion of the first OFDM packet are shifted out of the guard interval portion of the shifted version; and substantially simultaneously transmitting the first OFDM packet and the shifted version of the OFDM packet.