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Orthogonal Frequency Division Multiple Access with Statistical Channel Quality Measurements Part-I: System and Channel Modeling  

Yoon, Seo-Khyun (단국대학교 전기전자컴퓨터공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.2A, 2006 , pp. 119-127 More about this Journal
Abstract
In this two-part paper, we consider dynamic resource allocation in orthogonal frequency division multiple access(OFDMA). To reduce the reverse link overhead for channel quality information(CQI) feedback, a set of sub-carriers are tied up to a sub-channel to be used as the unit of CQI feedback, user-multiplexing and the corresponding power/rate allocation. Specifically, we focus on two sub-channel structures, either aggregated or distributed, where the SNR distribution over a sub-channel is modeled as Ricean in general, and the channel quality of a sub-channel is summarized as the mean and variance of channel gain envelop divided by noise standard deviation. Then, we develop a generalized two step channel/resource allocation algorithm, which uses the two statistical measurements, and analyze the spectral efficiency of the OFDMA system in terms of average frequency utilization. An extension to proportional fair algorithm will also be addressed. As confirmed by numerical results, the aggregated structure is preferred especially when intending aggressive link adaptation.
Keywords
OFDMA; Dynamic Resource Allocation;
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1 C. Y. Wong, R. S. Cheng, K. B. Letaief and R. D. Murch, Multiuser OFDM with Adaptive Subcarrier, Bit and Power Allocation, IEEE JSAC, Vol.17, No. 10, pp.1747-1758, Oct. 1999
2 J. Jang and K. Lee, Transmit Power Adaptation for Multiuser OFDM Systems, IEEE Journal on Selected Areas in Communications, Vol.21, No.2, pp.171-178, Feb. 2003   DOI   ScienceOn
3 P.S. Chow and J.M. Cioffi, Bandwidth optimization for high speed data transmission over channels with severe intersymbol interference, Proc. of Globecom 1992. Vol.1, pp. 59-63, Dec.6-9, 1992
4 A. Goldsmith and P. Varaiya, Increasing spectral efficiency through power control, Proc. of ICC'93, pp. 600-604, June 1993
5 A. Goldsmith and S. Chua, Adaptive Coded Modulation for Fading Channels, IEEE Trans. on Comm., Vol.46, No.5, pp.595-602, May 1998   DOI   ScienceOn
6 R. Knopp and P.A. Humblet, Multiple Accessing over Frequency Selective Channels, Proc. of PIMRC'95, pp.1326-1330
7 3GPP TSG-RAN, TR25.892 v1.1.0, Feasibility Study for Enhanced Uplink for UTRA, March 2004
8 W. Hirt and J.L. Messey, Capacity of the Discrete-Time Gaussian Channel with Intersymbol Interference, IEEE Trans. on Information Theory, Vol.34, No.3, pp.380-388, May 1988
9 H. Yin, H. Liu, 'An efficient multiuser loading algorithm for OFDM-based broadband wireless systems,' Proc. of Globecom'00, Vol.1, pp.103-107, San Francisco, USA, 2000
10 P.S. Chow, J.M. Cioffi and J.A.C. Bingham, A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels, IEEE Trans. on Comm., Vol.43, No.234, pp.773-775, Feb./March/April 1995   DOI   ScienceOn
11 IEEE Standard for Local and Metropolitan Area Networks--Part 16: Air Interface for Fixed Broadband Wireless Access Systems, http://standards.ieee.org/getieee802/
12 T. M. Cover, Elements in Information Theory, Wiley Interscience, 1991
13 G. Strang, Linear Algebra and its Applications, 1989
14 조용수, 휴대인터넷 무선접속 표준 기술, TTA저널 제93호, TTA, 2004. 6
15 S. Pfletschinger, G. Mnz, J. Speidel, 'Efficient Subcarrier Allocation for multiple access in OFDM Systems', Proc. of 7th International OFDM-Workshop, pp.21-25, Sep. 2002, Hamburg
16 W. Rhee and J.M. Cioffi, Increase in Capacity of Multiuser OFDM System Using Dynamic Sub-Channel Allocation, Proc. of VTC'00-Spring, Vol.2, pp.15-18 May 2000
17 J. Campello, Discrete Bit Loading for Multicarrier Modulation Systems, Ph.D. dissertation, Stanford, 1999
18 A. Goldsmith and S. Chua, Variable-Rate Variable-Power MQAM for Fading Channels, IEEE Trans. on Comm., Vol.45, No. 10, pp.1218-1230, Oct. 1997   DOI   ScienceOn