TRANSMITTER, RECEIVER, AND TRANSMITTING METHOD

摘要

[PROBLEMS] To prevent degradation of transmission characteristics by arranging signal points most suitably for each error correction code. [MEANS FOR SOLVING PROBLEMS] An LDPC coding section (11-1) carries out error correction coding by using an LDPC code such that its coding rate is a specific value such as 27/40. The LDPC code is subjected to, e.g., 16 APSK modulation or 32 APSK modulation and transmitted. The signal points of the 16 and 32 APSK modulation are arranged in positions most suitable for the LDPC code of each coding rate. The invention can be applied to, e.g., a BS digital broadcast system.