NDLI: EXIT-chart-based power allocations for superposition multilevel coding systems

Content Provider	IEEE Xplore Digital Library
Author	Xiuni Wang Xiao Ma
Copyright Year	2008
Description	Author affiliation: Dept. of Electron. & Commun. Eng., Sun Yat-sen Univ., Guangzhou (Xiuni Wang; Xiao Ma)
Abstract	Multilevel coding with sigma-mapping is one simple way to obtain coding gain as well as shaping gain, while power-allocation, by allocating proper powers to different levels, can facilitate the iterative decoding/detection algorithms. In this paper, we utilize the EXIT chart to calculate the convergence threshold for each level by treating the signals from other levels as Gaussian noise. Based on the threshold, we propose a simple power allocation scheme. Numerical results show that the proposed EXIT-based power allocation scheme improves the performance when compared with the existing Gaussian approximation power allocation scheme while still keeping a reasonable complexity.
Starting Page	344
Ending Page	348
File Size	1024268
Page Count	5
File Format	PDF
ISBN	9781424423736
DOI	10.1109/CHINACOM.2008.4685037
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-08-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	AWGN superposition Bit error rate power allocation multilevel coding Sun Power system modeling Iterative decoding Gaussian approximation Convergence Parity check codes Detection algorithms EXIT Power engineering and energy
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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