Patent ID: 8559552

Claim:
A method for performing dual carrier modulation (DCM) precoding using an orthogonal frequency division multiplexing (OFDM) transmitter, comprising: generating, by the OFDM transmitter, data sub-blocks; independently interleaving the sub-blocks; generating bit vectors by grouping bits of the interleaved sub-blocks; mapping the bit vectors into data symbols; and precoding the data symbols using a precoding matrix to generate precoded symbols, the precoding matrix being a unitary matrix and a real matrix that includes only integer elements multiplied by a real normalization factor, the precoding matrix for a 16QAM modulation scheme being selected from the group consisting of: R 1 = 1 29 ⁡ [ 5 2 2 - 5 ] ; R 2 = 1 34 ⁡ [ 5 3 3 - 5 ] ; R 3 = 1 58 ⁡ [ 7 3 3 - 7 ] ; R 4 = 1 73 ⁡ [ 8 3 3 - 8 ] ; R 5 = 1 305 ⁡ [ 16 7 7 - 16 ] ; R 6 = 1 65 ⁡ [ 7 4 4 - 7 ] ; and R 7 = 1 337 ⁡ [ 16 9 9 - 16 ] .