Patent ID: 8976643
Filing Date: 2015-03-10
Classification: H04B,H04L,H04W

Abstract:
1. A wireless communication method for a transmission apparatus that transmits an OFDM (orthogonal frequency division multiplexing) signal using a communication band, which comprises a plurality of subcarrier groups each including a plurality of subcarriers, the method comprising: specifying which subcarrier group and how many subcarriers are to be used to transmit the OFDM signal and determining a configuration of a transmission frame; generating the OFDM signal by mapping data symbols according to the determined configuration of the transmission frame; and transmitting the generated OFDM signal, wherein: a number of subcarriers included in each subcarrier group is variable; the OFDM signal is generated using a plurality of modulation schemes including QPSK (quadrature phase shift keying) and 16QAM (quadrature amplitude modulation); a plurality of mapping patterns are prepared for each of the plurality of modulation schemes, each mapping pattern indicating a combination of candidate positions of signal points on an IQ (in-phase quadrature) plane; and combinations of candidate positions of signal points based on mapping patterns other than a first mapping pattern included in the plurality of mapping patterns are generated by rotating a first combination of candidate positions of signal points based on the first mapping pattern, in a same direction, around the origin on the IQ plane.