Frequency Offset Interference Canceller for Multi-Link Transmission in OFDM Systems

Atsushi NAGATE  Kenji HOSHINO  Teruya FUJII  

Publication
IEICE TRANSACTIONS on Communications   Vol.E93-B   No.3   pp.620-628
Publication Date: 2010/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.620
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDM,  multi-link transmission,  frequency offset,  interference canceller,  

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Summary: 
It is important to improve a cell-edge throughput of next generation mobile communication systems. Frequency reuse schemes such as three-cell reuse or fractional frequency reuse are suitable for achieving this goal. Another candidate is multi-link transmission; signals on different sub-carriers from adjacent base stations are received by a mobile. However, the orthogonality of these signals can collapse if a frequency offset between adjacent base stations is excessive; this loss triggers adjacent-channel interference. This paper proposes an interference canceller to solve this problem and confirms the effectiveness of the method through numerical analysis and computer simulations.