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Generalized analysis model for fractional frequency reuse
Authors:XI Wei  YIN Chang-chuan  YUE Guang-xin  SUN Hong-mei
Affiliation:XI Wei1,YIN Chang-chuan1,YUE Guang-xin1,SUN Hong-mei2 1.Laboratory of Wireless Communication Systems and Networks,Beijing University of Posts and Telecommunications,Beijing 100876,China 2.Communication Technology Laboratory,Intel China Research Center,Beijing 100190,China
Abstract:Fractional frequency reuse (FFR) is an effective technique to mitigate co-channel interference in orthogonal frequency division multiple access (OFDMA)-based broadband cellular systems. In this paper, we present a generalized model for FFR under which all existing FFR schemes can be considered as its special cases. Additionally, quality factor has been proposed to indicate the quality of the subband. An interesting conclusion can be drawn that, as the power ratio in FFR is adjusted continuously, the corresponding quality factor varies smoothly. Subsequently, simulation is conducted based on worldwide interoperability for microwave access (WiMAX), and the result agrees well with our theoretical analysis. Finally, an effective range for power ratio is presented, which is very instructive to practical system design.
Keywords:co-channel interference  FFR  power ratio
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