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

It is important to improve the cell-edge throughput of the next generation mobile communication systems. Frequency reuse schemes such as 3-cell reuse or fractional frequency reuse are suitable for achieving this goal. Another candidate is multi- link transmission; it receives signals on different sub-carriers from adjacent base stations. However, the orthogonality of these signals can collapse if the frequency offset between the 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 with computer simulations.