WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD

摘要

A wireless communication method is provided for a transmission apparatus that transmits an OFDM (orthogonal frequency division multiplexing) signal using a communication band that comprises a plurality of subcarrier groups each including a plurality of subcarriers. The method includes 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. The number of subcarriers to be used to transmit the OFDM signal is variable, the OFDM signal may be generated using a plurality of modulation schemes including QPSK and 16QAM, and a plurality of mapping patterns are prepared for each of the plurality of modulation schemes.

主权项

1. A wireless communication method for a transmission apparatus that transmits an OFDM (orthogonal frequency division multiplexing) signal using a communication band that 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, characterized in that: a number of subcarriers to be used to transmit the OFDM signal is variable; the OFDM signal may be generated using a plurality of modulation schemes including QPSK and 16QAM; 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 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 an origin on the IQ plane.