Patent ID: 8274941

Claim:
A subcarrier scrambling method for use in a transmitter with multiple subcarriers, the transmitter being configured to allocate pilot symbols and data symbols for each of a plurality of resource units (RUs), the method comprising: applying, for each of the plurality of RUs, a first intra RU sequence to the pilot symbols, to thereby generate a plurality of scrambled pilot symbols; applying, for each of the plurality of RUs, a second intra RU sequence to the data symbols, to thereby generate a plurality of scrambled data symbols; and combining the plurality of scrambled pilot symbols and the plurality of scrambled data symbols to form the plurality of RUs; wherein the transmitter is configured to serve a cell including one or more segments, the method further comprising: generating a first random sequence based on a number of segments in the cell; and generating the first intra RU sequence based on the first random sequence and a cell identification number of the cell.