Patent ID: 8102933

Claim:
A method of processing at least one sequence of data symbols to be transmitted over a wireless channel including N sub-carriers having different frequencies, comprising: defining, in the at least one sequence of data symbols, a plurality of blocks of data symbols, each of said blocks of data symbols including one data symbol corresponding to each of the N sub-carriers, processing each of said blocks of data symbols such that the correspondence between at least two of the data symbols in the block and their respective sub-carriers are changed, to create a processed block in which each data symbol corresponds to one of said sub-carriers; for each processed block of data symbols, generating a corresponding conjugated block of data symbols which includes N symbols that are the complex conjugate of a corresponding data symbol in the processed block of symbols; processing pairs of said processed blocks of symbols for transmission on a first antenna on the N sub-carriers in a temporal first order; and processing pairs of said conjugated blocks of symbols for transmission on a second antenna on the N sub-carriers in the reverse temporal order.