Patent ID: 7447268

Claim:
An apparatus comprising: a first phase shifter to provide subcarrier dependent phase shifts to modulation symbols to generate first phase shifted modulation symbols, wherein said modulation symbols correspond to subcarriers of an orthogonal frequency division multiplexing (OFDM) signal; a first inverse discrete Fourier transform unit to convert said first phase shifted modulation symbols from a frequency domain representation to a time domain representation for transmission into a wireless channel; a second phase shifter to provide subcarrier dependent phase shifts to said modulation symbols to generate second phase shifted modulation symbols, wherein said second phase shifter provides different subcarrier dependent phase shifts to said modulation symbols than said first phase shifter; and a second inverse discrete Fourier transform unit to convert said second phase shifted modulation symbols from a frequency domain representation to a time domain representation; wherein said subcarrier dependent phase shifts of said first and second phase shifters are selected to convert a wireless channel displaying flat multipath fading into a wireless channel displaying frequency selective multipath fading; wherein said first inverse discrete Fourier transform unit is associated with a first antenna path and said second inverse discrete Fourier transform unit is associated with a second antenna path.