Patent ID: 8094547

Claim:
An orthogonal frequency division multiplexing (OFDM)-based orthogonal frequency and code hopping multiplexing (OFCHM) communication method in a digital communication system comprising a first communication station and a second communication station, the digital communication system provided for efficient multiplexing of communication channels to the first and second communication stations, and multiplexing the communication channels, wherein the multiplexing comprises the steps of: spreading at the first communication station, a data stream to be multiplexed and intended for transmission to the second communication station, based on a predetermined spreading factor; arranging the data stream on one OFDM-based subcarrier along only a time axis; and multiplexing the spread data symbols to be transmitted to the second communication stations, wherein the said spread data symbols are assigned to the single subcarrier by hopping using only orthogonal codewords in the said spreading and assigning steps.