New subcarrier allocation for uplink-OFDMA under time-varying channels
Kim, Kwanghoon Park, Hyuncheol Kwon, Hyuck M.
Kim, Kwanghoon
Park, Hyuncheol
Kwon, Hyuck M.
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2012-10-18
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Article
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Keywords
Inter-carrier Interference,Multiuser Interference,Ofdma,Successive Interference Cancelation,Time-varying Channels,Intercarrier Interference,Multi-user Interference,Ofdma,Successive Interference Cancelations,Time Varying Channel,Decoding; Global System For Mobile Communications,Multiuser Detection,Spurious Signal Noise,Time Varying Networks,Frequency Division Multiple Access
Subjects (LCSH)
Citation
K. Kim, H. Park and H. M. Kwon, "New Subcarrier Allocation for Uplink-OFDMA under Time-Varying Channels," in IEEE Transactions on Communications, vol. 61, no. 1, pp. 7-12, January 2013, doi: 10.1109/TCOMM.2012.100512.110011
Abstract
Inter-carrier interference (ICI) and multiuser interference (MUI) occur in an uplink orthogonal frequency division multiple access system if a channel between a mobile user and a base station is rapidly time-varying. To reduce the ICI and MUI, this letter proposes a subcarrier allocation method. The key idea is to allocate a high-speed user's subcarrier near a low-speed user's one. Then, a wide Doppler spread of a high-speed user can be spilled over a low-speed user's subcarrier band with insignificant influence, and the signal-to-interference-plus-noise ratio (SINR) at each high-speed user's subcarrier can be maximized. This can provide a significant performance improvement of multiuser detection in an uplink-OFDMA. © 1972-2012 IEEE. © 2013 Elsevier B.V., All rights reserved.
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This is an open access article under the CC BY license.
Publisher
Institute of Electrical and Electronics Engineers Inc.
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IEEE Transactions on Communications
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15580857
00906778
00906778