Patent ID: 8792325

Claim:
A system comprising: a mapping device configured to group encoded bits of a plurality of orthogonal frequency division multiplexing symbols into respective first groups, for each of the first groups of the encoded bits, map adjacent bits onto non-adjacent subcarriers of a plurality of subcarriers and in an alternating manner onto respective bits of a signal constellation such that every other one of the adjacent bits are mapped to first bits on the signal constellation, and bits other than the every other one of the adjacent bits are mapped to second bits on the signal constellation, wherein each of the first groups of the encoded bits has a corresponding complex number corresponding to a location on the signal constellation, group predetermined numbers of the first groups of the encoded bits into second groups, wherein each of the second groups corresponds to one of the plurality of orthogonal frequency division multiplexing symbols, and map each of the second groups to one of the plurality of subcarriers such that each of the plurality of subcarriers is modulated based on one of the complex numbers for each of the plurality of orthogonal frequency division multiplexing symbols; a processor configured to generate a digital signal based on the second groups; and a transmitter configured to transmit the digital signal.