Spectral Efficiency Improvement of Fractional Frequency Reuse by Inter-Cell Interference Cancellation on Cooperative Base Station

Kazuki MARUTA  Atsushi OHTA  Masataka IIZUKA  Takatoshi SUGIYAMA  

IEICE TRANSACTIONS on Communications   Vol.E95-B    No.6    pp.2164-2168
Publication Date: 2012/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.2164
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
inter-cell interference cancellation,  base station cooperation,  fractional frequency reuse,  

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This paper proposes applying our inter-cell interference (ICI) cancellation method to fractional frequency reuse (FFR) and evaluates the resulting spectral efficiency improvement. With our ICI cancellation method based on base station cooperation, the control station generates ICI replica signals by simple linear processing. Moreover, FFR effectively utilizes frequency resources by both allowing users in the cell-center region to access all available sub-channels and increasing the transmission power to users in the cell-edge region. FFR provides the conditions under which the ICI cancellation method works effectively. Computer simulations show that the average spectral efficiency of the proposed method is comparable to that of cooperative MU-MIMO, which can completely remove ICI.