TRANSMISSION CONTROL FRAME GENERATION DEVICE, TRANSMISSION CONTROL FRAME PROCESSING DEVICE, TRANSMISSION CONTROL FRAME GENERATION METHOD, AND TRANSMISSION CONTROL FRAME PROCESSING METHOD

摘要

There is provided a transmission control frame generation device capable of reducing the data amount of feedback information while maintaining the quality of the feedback information. In this device, an average quality level calculation unit (182) calculates a reference line state level between sub-carriers from the line state levels corresponding to the sub-carriers. A DPCM (Differential Pulse Code Modulation) unit (184) encodes a difference value between a first line state level of a sub-carrier and a second line state level of another sub-carrier and an encoded difference value is obtained. A feedback frame generation unit (185) generates a frame indicating the reference line state level and the encoded difference value. A number-of-bits control unit (183) controls encoding of the difference value according to the relative size with respect to one of the reference line state levels: the first line state level or the second line state level.