Patent ID: 8094739

Claim:
A modulation parameter selecting method related to a modulation method and a coding rate, in a system which allows, with respect to data allocated over a plurality of channels by performing data transmission using the plurality of channels from a first communication apparatus to a second communication apparatus, that the coding rate is same and only the modulation method is different in the plurality of channels to which the data has been allocated, comprising: a first step of selecting and temporarily determining one coding rate from predetermined selectable coding rates; a second step of selecting a modulation method that satisfies required quality and has a predetermined transmission rate in each of the channels, under the temporarily determined coding rate; a third step of calculating a transmission rate from the coding rate temporarily determined at the first step and the modulation method in each of the channels selected at the second step; and a fourth step of repeating from the first step to the third step with respect to other selectable coding rates to determine the coding rate that has the predetermined transmission rate and the modulation method in each of the channels, wherein before the second step, a fifth step of ordering each of the channels based on reception quality, and a sixth step of ordering selectable modulation methods by modulation multi-value number, and wherein the modulation method is selected at the second step in accordance with an order of the channels determined at the fifth step and an order of the modulation methods determined at the sixth step.