DocumentCode :
1488953
Title :
Near-capacity iterative decoding of binary self-concatenated codes using soft decision demapping and 3-D EXIT charts
Author :
Butt, Muhammad Fasih Uddin ; Riaz, Raja Ali ; Ng, Soon Xin ; Hanzo, Lajos
Author_Institution :
Sch. of Electron. & Comput. Sci., Univ. of Southampton, Southampton, UK
Volume :
9
Issue :
5
fYear :
2010
fDate :
5/1/2010 12:00:00 AM
Firstpage :
1608
Lastpage :
1616
Abstract :
In this paper 3-D Extrinsic Information Transfer (EXIT) charts are used to design binary Self-Concatenated Convolutional Codes employing Iterative Decoding (SECCC-ID), exchanging extrinsic information with the soft-decision demapper to approach the channel capacity. Recursive Systematic Convolutional (RSC) codes are selected as constituent codes, an interleaver is used for randomising the extrinsic information exchange of the constituent codes, while a puncturer helps to increase the achievable bandwidth efficiency. The convergence behaviour of the decoder is analysed with the aid of bit-based 3-D EXIT charts, for accurately calculating the operating EbN0 threshold, especially when SP based soft demapper is employed. Finally, we propose an attractive system configuration, which is capable of operating within about 1 dB from the channel capacity.
Keywords :
binary codes; charts; concatenated codes; iterative decoding; 3D EXIT Chart; SECCC-ID; binary self-concatenated code; bit-based 3D EXIT chart; channel capacity; extrinsic information transfer chart; near-capacity iterative decoding; recursive systematic convolutional code; soft decision demapping; AWGN; Bandwidth; Channel capacity; Concatenated codes; Convergence; Convolutional codes; Error correction codes; Independent component analysis; Iterative decoding; Turbo codes;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2010.05.081254
Filename :
5463216
Link To Document :
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