Patent ID: 8320566

Claim:
A method for communications transmission using orthogonal frequency division multiple access on a network comprising: a) providing a plurality of transmitting network devices with a set of available subcarriers for orthogonal frequency division multiple access; b) providing a corresponding element of a pseudorandom noise sequence for each subcarrier of the set of available subcarriers; c) allocating a subset of the set of available subcarriers to each of the transmitting network devices; d) a transmitting network device of the plurality of devices mapping a packet onto a plurality of used subcarriers of its allocated subset of available subcarriers, wherein the step of mapping the packet comprises mapping the packet onto a plurality of quadrature amplitude modulated symbols to be transmitted on the used subcarriers; e) the transmitting network device performing a predetermined transformation on a quadrature amplitude modulated symbol using the element of the pseudorandom noise sequence corresponding to the used subcarrier; f) the transmitting network device transmitting the transformed symbol to a receiving network device.