Transmitting apparatus and interleaving method thereof

摘要

A transmitting apparatus is provided. The transmitting apparatus includes: an encoder configured to generate a low density parity check (LDPC) codeword by LDPC encoding based on a parity check matrix; an interleaver configured to interleave the LDPC codeword; and a modulator configured to map the interleaved LDPC codeword onto a modulation symbol, wherein the modulator is further configured to map a bit included in a predetermined bit group from among a plurality of bit groups constituting the LDPC codeword onto a predetermined bit of the modulation symbol.

主权项

1. An interleaving method of a transmitting apparatus, comprising:
encoding input bits to generate parity bits using a Low Density Parity Check (LDPC) code according to a code rate of 5/15 and a code length of 16200; interleaving an LDPC codeword comprising the input bits and the parity bits; and mapping the interleaved LDPC codeword onto constellation points for QPSK, wherein the interleaving comprises:
splitting the LDPC codeword into a plurality of bit groups; andinterleaving the plurality of bit groups, wherein the interleaving the plurality of bit groups comprises interleaving the plurality of bit groups using a following equation:
Yj=Xπ(j)for
(0≦j