NDLI: Adaptive modulation for maximum throughput of multi-user SC-FDMA system in doubly selective channel

Content Provider	IEEE Xplore Digital Library
Author	Jangsu Kim Heung-Gyoon Ryu
Copyright Year	2010
Description	Author affiliation: Department of Electronic Engineering, Chungbuk National University, KOREA (Jangsu Kim; Heung-Gyoon Ryu)
Abstract	Performance of multi-user SC-FDMA (single carrier-frequency division multiple access) system varies according to the user allocation and adaptive bit assignment to the subcarriers because each user experiences different channel characteristics. If any specific user suffers from poor channel characteristics in the conventional method of the distributed and localized user mapping, the total communication performance will be degraded. So, in this paper, we like to propose a user allocation method to improve the system performance in the frequency selective fading channel. We allocate users first who have best channel condition in comparison with all users to each subcarrier according to the channel state information. And we increase bandwidth efficiency by improving the modulation level to high order because most users have good channel condition through subcarrier allocation method. Therefore, we improve system performance like the BER performance and throughput effectively. Through the computer simulations, the performance of proposed system is analyzed and compared with existing method.
Starting Page	681
Ending Page	684
File Size	364523
Page Count	4
File Format	PDF
ISBN	9781424447251
DOI	10.1109/RWS.2010.5434143
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-01-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Throughput System performance Degradation Radio spectrum management Fading Channel state information Bandwidth Bit error rate Computer simulation Performance analysis maximum throughput multi-user SC-FDMA adaptive subcarrier allocation
Content Type	Text
Resource Type	Article

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