Patent ID: 7394858

Claim:
A transmitter comprising: a parser to parse a block of bits representing an orthogonal frequency division multiplexed symbol into groups of a variable number of coded bits; subcarrier modulators to individually modulate the groups on orthogonal frequency division multiplexed subcarriers in accordance with spatial-frequency subcarrier modulation assignments to generate symbol-modulated subcarriers; and IFFT circuitry to generate time domain waveforms from the symbol-modulated subcarriers for subsequent RF transmission over a plurality of spatial channels, wherein the spatial-frequency subcarrier modulation assignments are provided by a receiving station to the transmitter to transmit the orthogonal frequency division multiplexed symbol, and wherein the receiving station comprises a subcarrier modulation assignment generator to determine the spatial-frequency subcarrier modulation assignments based on channel characteristics of the spatial channels prior to transmission to the transmitter.