Optimization of degree-profile matching interleavers for LDPC-coded modulation

Author

Yang, Hyun-Koo ; Yang, Kyeongcheol

Author_Institution

Dept. of Electron. & Electr. Eng., Pohang Inst. of Sci. & Technol.

Volume

10

Issue

12

fYear

2006

fDate

12/1/2006 12:00:00 AM

Firstpage

843

Lastpage

845

Abstract

In this paper we introduce the concept of degree-profile matching interleavers (DPM-interleavers) and propose an LDPC-coded modulation scheme with a DPM-interleaver for 2^m-PAM. One advantage of our scheme over conventional LDPC-coded modulation schemes is to support various modulation orders in a single coder/decoder by properly choosing DPM-interleavers according to each modulation order. Given the degree distribution for a good binary LDPC code, we present the optimized degree-profiles for DPM-interleavers by density evolution in the cases of 4-PAM and 8-PAM, respectively. Simulation results show that our proposed scheme provides compatible performance with those of conventional LDPC-coded modulation schemes

Keywords

interleaved codes; modulation coding; parity check codes; pulse amplitude modulation; LDPC-coded modulation; PAM; degree-profile matching interleavers; AWGN; Additive white noise; Block codes; Codecs; Decoding; Error correction codes; Microwave integrated circuits; Modulation coding; OFDM; Parity check codes;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2006.060958

Filename

4027622