Multicarrier transmission apparatus and method

A multicarrier transmission apparatus for transmitting data using a bit distribution ratio, comprising:

• a measurement result calculating unit comprising an SNR calculation unit and a minimum bit distribution ratio calculating unit;
• the SNR calculation unit for calculating a Signal to Noise Ratio (SNR) of periodic noise on a communication line,
• the minimum bit distribution ratio calculating unit for comparing a plurality of calculation results of the SNR calculated by the SNR calculation unit with each other to thereby detect a minimum SNR value for a plurality of frequencies and calculating, on the basis of the minimum SNR value for the plurality of frequencies detected by the measurement result calculating unit, a minimum measurement result including minimum SNR values of all of the plurality of frequencies, and for calculating, on the basis of the minimum measurement result calculated by the minimum bit distribution ratio calculating unit, a minimum bit distribution ratio to be assigned to each cater for data transmission;
• and
• a transmitting unit for transmitting said data using the minimum bit distribution ratio calculated by the minimum bit distribution ratio calculating unit.

A multicarrier transmission method for use with a multicarrier transmission apparatus for transmitting data using a bit distribution ratio, wherein the multicarrier transmission apparatus includes a bit distribution ratio calculating unit and a transmitting unit wherein the bit distribution ratio calculating unit includes a SNR calculation unit and a minimum bit distribution ratio calculating unit, comprising the steps to be performed by the multicarrier transmission apparatus, the steps including:

• an SNR calculating step of calculating a Signal to Noise Ratio (SNR) of periodic noise on a communication line, the SNR being determined by the SNR calculation unit;
• a minimum bit distribution ratio calculating step of calculating the bit distribution ratio to be assigned to each cater for data transmission according to a calculation result of the SNR calculated by the SNR calculation step, the bit distribution ratio being determined by the minimum bit distribution ratio calculating unit;
• the minimum bit distribution ratio calculating step of comparing a plurality of bit distribution ratios calculated by the bit distribution ratio calculating step with each other to thereby detect a minimum bit value for each carrier, and calculating, on the basis of the minimum bit value of each cater detected by the minimum bit distribution ratio calculating step, a minimum bit distribution ratio including minimum bit values of all carriers, the minimum bit distribution ratio being determined by the minimum bit distribution ratio calculating unit;
• and
• a transmitting step of transmitting said data using the minimum bit distribution ratio calculated by the minimum bit distribution ratio calculating step, the data being transmitted by the transmitting unit.

A multicarrier transmission method for use with a multicarrier transmission apparatus for transmitting data using a bit distribution ratio, wherein the multicarrier transmission apparatus includes a measurement result calculating unit and a transmitting unit wherein the measurement result calculating unit includes a SNR calculation unit and a minimum bit distribution ratio calculating unit, comprising the steps to be performed by the multicarrier transmission apparatus, the steps including:

• an SNR calculating step of calculating a Signal to Noise Ratio (SNR) of periodic noise occurring on a communication line, the SNR being determined by the SNR calculation unit;
• a minimum bit distribution ratio calculating step of comparing a plurality of calculation results of the SNR calculated by the SNR calculating step with each other to thereby detect a minimum SNR value for the plurality of frequencies and calculating, on the basis of the minimum SNR value of each cater detected by the minimum bit distribution ratio calculating step, a minimum measurement result including the minimum SNR value of the plurality of frequencies, the bit distribution ratio being determined by the minimum bit distribution ratio calculating unit;
• the minimum bit distribution ratio calculating step of calculating, on the basis of the minimum measurement result calculated by the measurement result calculating step, a minimum bit distribution ratio to be assigned to each carrier for data transmission, the minimum bit distribution ratio being determined by the minimum bit distribution ratio calculating unit;
• and
• a transmitting step for transmitting said data using the minimum bit distribution ratio calculated by the minimum bit distribution ratio calculating step, the data being transmitted by the transmitting unit.