Patent ID: 7778362

Claim:
A method for orthogonal frequency division multiplexing (OFDM) transmission, the method comprising the stages of: providing a channel estimation sequence that is characterized by a low peak to average ratio over a significant range of guard to information power ratio, wherein the significant range exceeds 5 db; and transmitting by a transmitting circuitry of an OFDM device the channel estimation sequence over multiple sub-carriers, whereas the stage of providing involves utilizing a certain frequency domain sequence that comprises at least the following elements: (1+j)*(1, 1, −1, 1, −1, −1, 1, −1, 1, −1, 1, 1, −1, −1, −1, 1, 1, −1, 1, −1, 1, 1, 1, −1, 1, 1, 1, −1, −1, 1, 1, 1, 1, −1, −1, 1, −1, 1, 1, 1, −1, −1, 1, 1, −1, −1, 1, −1, 1, 1, 1, 1, 1, −1, 1, 1, −1, −1, −1, −1, −1), whereas j is the square root of minus one.