Threshold Determination of LDPC Codes for Turbo Equalization Based on EXIT Chart

Author

Hua, Xu ; Cheng-qi, Xu ; Su-cheng, Kang

Author_Institution

Coll. of Commun. & Inf. Eng., Nanjing Univ. of Posts & Telecommun.

Volume

2

fYear

2006

fDate

25-28 June 2006

Firstpage

698

Lastpage

701

Abstract

Optimization of LDPC codes based on (EXIT) chart for MIMO channel was recently proposed by Brink. We extended Brink´s idea to the performance analysis and threshold determination of LDPC codes for MMSE turbo equalization. The receiver was partitioned into two blocks. A new scheme to obtain EXIT curve of block I was given. Furthermore a new algorithm was proposed based on the EXIT curve fitting, which can obtain the ensemble threshold automatically. Decoding trajectory of (3,6) regular LDPC codes for MMSE turbo equalization was also analyzed in this paper. Threshold of (3,6) regular LDPC codes obtained by proposed algorithm is only 0.03 dB away to Narayanan´s result over the same ISI channel

Keywords

MIMO communication; decoding; equalisers; intersymbol interference; least mean squares methods; parity check codes; turbo codes; EXIT chart; ISI channel; LDPC; MIMO channel; MMSE turbo equalization; decoding trajectory; intersymbol interference; low density parity check code; minimum mean square error; multiple input multiple output; performance analysis; Convergence; Curve fitting; Decoding; Detectors; Educational institutions; Equalizers; MIMO; Modulation coding; Parity check codes; Partitioning algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems Proceedings, 2006 International Conference on

Conference_Location

Guilin

Print_ISBN

0-7803-9584-0

Electronic_ISBN

0-7803-9585-9

Type

conf

DOI

10.1109/ICCCAS.2006.284751

Filename

4063992