Patent ID: 7233625

Claim:
A method of configuring a preamble portion of a data signal for transmission over a plurality of sub-carriers by at least two antennas of a transmitter device, said method comprising: assigning a respective pseudo-noise (PN) code to each of said at least two antennas; assigning each of said plurality of sub-carriers to a respective one of said at least two antennas; modulating each of said plurality of sub-carriers as a function of said respective pseudo-noise (PN) code that is assigned to a same one of said at least two antennas as said each of said plurality of sub-carriers such that a plurality of modulated sub-carriers are obtained that are each assigned to a respective one of said at least two antennas; delivering each of said plurality of modulated sub-carriers to its assigned transmitter; and transmitting, at substantially a same time, each said plurality of modulated sub-carriers using its assigned transmitter.