NDLI: Soft-demodulation of Transform Domain Communication System Signals

Content Provider	IEEE Xplore Digital Library
Author	Han, Chuan Wang, Jun Liu, Ning Gong, Shuping Li, Shaoqian
Copyright Year	2007
Description	Author affiliation: National Key Laboratory of Communications, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P.R. China, Email: chuan.han.comm@gmail.com (Han, Chuan) \|\| National Key Laboratory of Communications, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P.R. China, Email: shuping81@tom.com (Gong, Shuping) \|\| National Key Laboratory of Communications, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P.R. China (Liu, Ning) \|\| National Key Laboratory of Communications, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P.R. China, Email: lsq@uestc.edu.cn (Li, Shaoqian) \|\| National Key Laboratory of Communications, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P.R. China, Email: junwang@uestc.edu.cn (Wang, Jun)
Abstract	Cognitive radio (CR) has become one promising solution to the shortage of spectrum resources and transform domain communication system (TDCS) has been proposed as one candidate transmission technique of CR, especially as a transmission candidate of signaling in the CR context. While in most modern communication systems soft-demodulation is concatenated with soft-decision decoding to achieve high performances, current TDCS cannot output soft information. In this work, the soft-demodulation algorithm of TDCS signals in fading channels and its efficient IFFT-based implementation are proposed. This implementation only introduces negligible complexity increase in the receiver; however, it brings performance improvement and makes it possible to efficiently and iteratively soft-decode coded data. Simulation results of both perfect and practical channel estimation in the IEEE 802.22 Profile C channel show that the proposed method outperforms the hard-decision demodulation method, especially in the high-SNR-region.
Starting Page	384
Ending Page	388
File Size	2570040
Page Count	5
File Format	PDF
ISBN	9781424408146
DOI	10.1109/CROWNCOM.2007.4549828
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Context OFDM Laboratories Decoding Cognitive radio transform domain communication system Convolution cognitive radio Channel estimation Chromium soft-demodulation Demodulation
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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