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Spectral Efficient Multiuser Technique with Channel-Dependent Resource Allocation Schemes SCIE SCOPUS

Title
Spectral Efficient Multiuser Technique with Channel-Dependent Resource Allocation Schemes
Authors
Choi, CHLim, HJKim, TKIm, GHLawrence, VB
Date Issued
2012-03
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
This paper proposes a spectral efficient multiuser scheme for single-carrier transmission. In the proposed scheme, a combination (hybrid) of localized and distributed subcarrier mapping types is employed, where the signals of users with different subcarrier mapping types are superimposed on a common set of subcarriers. We first present mathematical formulations of multiuser detection and derive the equalization coefficients for the hybrid type. In fading environments, the proposed scheme allows users to employ any subcarrier mapping types (localized, distributed, hybrid types), which can support low and high speed users. To estimate the performance of the proposed scheme, we develop a density evolution technique and show that the predicted performances are consistent with simulated performances. Further, based on the performance estimation of the proposed scheme, we discuss channel-dependent resource allocation algorithms: opportunistic scheduling and adaptive modulation and coding (AMC) schemes. These resource allocation algorithms increase the spectral efficiency of the proposed scheme with guaranteed quality-of-service (QoS). Simulation results show that the proposed multiuser scheme achieves both multiuser and frequency diversity gains in fading environments.
Keywords
Iterative multiuser detection using frequency-domain equalization (IMD-FDE); non-orthogonal multiple access transmission; resource allocation; single-carrier frequency division multiple access (SC-FDMA); FREQUENCY-DOMAIN EQUALIZATION; SC-FDMA; CODED CDMA; SYSTEMS; 3G; TRANSMISSION; EVOLUTION
URI
https://oasis.postech.ac.kr/handle/2014.oak/16444
DOI
10.1109/TWC.2012.012412.102042
ISSN
1536-1276
Article Type
Article
Citation
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 11, no. 3, page. 990 - 999, 2012-03
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임기홍IM, GI HONG
Dept of Electrical Enginrg
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