Performance Gain Analysis of Dynamic Carrier Allocation Using Order Statistics

Younghyun JEON  Sungho JEON  Sanghoon LEE  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.11   pp.3143-3147
Publication Date: 2006/11/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.11.3143
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
multiuser diversity,  spectral diversity,  dynamic channel allocation,  order statistics,  OFDMA,  OFDM,  diversity gain,  

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It is well known that the diversity gain attained by DCA (Dynamic Channel Allocation) is generally very high over OFDM (Orthogonal Frequency Division Multiplexing)-based broadband networks. This paper introduces a numerical approach for measuring the performance gain afforded by DCA. In the mathematical analysis, the property of order statistics is adopted to derive the upper bound of the expected throughput via the use of DCA. In the simulation, it was possible to achieve a gain of 5 dB by exploiting multi-user and spectral diversities when the number of users is 16 and the total number of subcarriers is 256.