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Uplink Sub-channel Allocation and Power Control Algorithm Using Ranging Information in High speed Portable Internet System  

Kim, Dae-Ho (충남대학교 전자공학과)
Kim, Whan-Woo (충남대학교 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.9A, 2005 , pp. 729-736 More about this Journal
Abstract
In this paper, we introduce a new approach for the design of uplink sub-channel allocation and power control in the High-speed Portable Internet system that is based on OmMAnDD scheme. In OFDMA system, because the number of allocated sub-channel in mobile station varies from one to the whole sub-channel as in base station while mobile station's transmit power is lower than that of base station, full loading range(FLR) constraint occurs where whole sub-channel can be used and the conventional open-loop power control scheme can not be used beyond FLR. We propose a new scheme that limits the maximum sub-channel allocation number and uses power concentration gain(PCG) depending on location of mobile station, which is based on ranging in OfDMA system. Simulation results show that the proposed scheme extends the uplink coverage to the entire cell service coverage area, provides solutions for optimum utilization of radio resource and enables open-loop power control beyond FLR without extra hardware complexity.
Keywords
HPi; Ranging; Full loading range; Power concentration gain; Uplink power control;
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1 홍대형, 강충구, 조용수, '휴대인터넷 표준화 현황', 한국통신학회지, 제21권 제2호, 2004. 2, pp.23-37
2 IEEE 802.16 d/D6, 'Air Interface for Fixed Broadband Wireless Access Systems', 2004
3 John B. Groe, Lawrence E. Larson, 'CDMA Mobile Radio Design', Artech house, 2000
4 김대호, 박윤옥, 김환우, '고속휴대인터넷을 위한 802.16a 기반의 OFDM 모뎀설계 및 성능분석', 제14회 통신정보합동학술대회 논문집, 1권, 4월 2004년, pp
5 Daeho Kim, Whan Woo Kim, 'Design and Implementation of 802.16a-Based OFDM MODEM for High-speed Portable Internet,' 4th lASTED, July 2004
6 Richard van Nee and R. Prasad, 'OFDM for wireless Multimedia Communications,' Artech House, 2000
7 C.Y. Wong, R.S. Cheng, K.B. Letaif, R.D. Murch, 'Multiuser OFDM with Adaptive Subscriber, Bit and Power allocation', IEEE Journal on Selected Areas in Comm., October 1999
8 Andrew J. Viterbi, 'CDMA Principles of Spread Spectrum Communication', Addison Wesley, 1995
9 한국정보통신기술협회, '2.3 GHz 휴대인터넷 표준', 2004. 6
10 IEEE 802.16 Broadband Wireless Access Working Group, 'Channel Models for Fixed Wireless Applications(IEEE 802. 16.e-01/29r2)'
11 T.S. Rappaport, 'Wireless Communications', Prentice-Hall, 1996