Patent ID: 8588315

Claim:
A decoding method in a system supporting an Orthogonal Frequency Division Multiplexing (OFDM)/Orthogonal Frequency Division Multiple Access (OFDMA) scheme, the decoding method comprising: receiving phase-modulated signal through a plurality of tiles, wherein a payload corresponding to the phase-modulated signal is mapped to a vector index sequence including a plurality of vector indices, wherein each vector index of the plurality of vector indices is mapped to a basis vector set among a plurality of basis vector sets, wherein each of the plurality of basis vector sets includes a plurality of subcarrier modulated values, wherein a first mapping rule is determined between the input payload and the vector index sequence, wherein a second mapping rule is determined between the plurality of vector indices and the plurality of basis vector sets; performing subcarrier demodulation on the received phase-modulated signal and generating correlation metrics, wherein the correlation metrics are obtained by using the received phase-modulated signal and the plurality of basis vector sets associated with the second mapping rule; generating decoding metrics for respective potential payload values, wherein each element of the decoding metrics is obtained by summing up a number of elements of the correlation metrics, wherein the number of elements of the correlation metrics are selected based on the first mapping rule; and determining the payload using a largest metric of the decoding metrics and at least one of an average metric and a second largest metric of the decoding metrics.