RADIO COMMUNICATION APPARATUS AND PUNCTURING METHOD

摘要

A radio communication apparatus is provided that enables degradation of error rate performance due to puncturing to be minimized when an LDPC code is used as an error correcting code. In this apparatus, a padding bit insertion section (101) inserts padding bits in a transmission bit sequence based on a parity check matrix, and outputs the generated bit sequence to an LDPC encoding section (102). Using the parity check matrix, LDPC encoding section (102) performs LDPC encoding on the bit sequence input from padding bit insertion section (101), and obtains an LDPC codeword composed of systematic bits and parity bits. Then a puncturing section (103) eliminates padding bits from the LDPC codeword input from LDPC encoding section (102), and also punctures parity bits in the LDPC codeword in order starting from a parity bit corresponding to a variable node forwhiehthe total number of connections to padding bits via check nodes is larger.