Wireless transmission apparatus and modulation scheme selection method
View Patent ↗A wireless transmission apparatus that can accurately select an optimal modulation scheme on a per block basis in a multi-carrier communication system in which block division of subcarriers and adaptive modulation are performed. In this wireless transmission apparatus, a propagation path characteristics acquisition section acquires the average SNR and SNR variance for each block, which are estimated by a wireless reception apparatus, using received signals inputted from a reception RF section and outputs these to an assignment section. The assignment section selects a modulation scheme for each block based on the average SNR and SNR variance of each block inputted from the propagation path characteristics acquisition section and modulation sections modulate multi-carrier signals included in each block, with the modulation scheme for each block selected by the assignment section.
1. A wireless reception apparatus comprising:
a reception section that receives signals from a transmission apparatus, the signals being mapped into a plurality of subcarriers in a frequency domain;
a calculating section that calculates a first value indicating an average of a plurality of channel quality values in the frequency domain and a second value indicating a variance value of the plurality of channel quality values in the frequency domain, the plurality of channel quality values corresponding to the plurality of subcarriers in the frequency domain; and
a reporting section that reports the first value and the second value to the transmission apparatus.
2. A wireless reception method comprising:
receiving signals from a transmission apparatus, the signals being mapped into a plurality of subcarriers in a frequency domain;
calculating a first value indicating an average of a plurality of channel quality values in the frequency domain and a second value indicating a variance value of the plurality of channel quality values in the frequency domain, the plurality of channel quality values corresponding to the plurality of subcarriers in the frequency domain; and
reporting the first value and the second value to the transmission apparatus.