Patent ID: 8028223

Claim:
A transmission device, in a system which transmits and receives a systematic code obtained by adding parity bits to information bits, comprising: a code rate monitoring portion, which monitors whether the code rate of the systematic code for transmission is a value within a specific range determined by decoding characteristic in a case where dummy bits are not inserted; a dummy bit insertion portion, which, when the code rate is a value within the specific range, inserts dummy bits into information bits and shifts the decoding characteristic, so that the code rate is a value outside a specific range determined by the decoding characteristic after shifting; a systematic code generation portion, which performs systematic encoding of information bits into which the dummy bits are inserted, and also deletes the dummy bits from the results of the systematic encoding to generate a systematic code; and a rate matching portion, which performs rate matching processing such that the size of the systematic code from which the dummy bits are deleted is equal to a size determined by the transmission rate of a physical channel.