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A New Resource Allocation Technique to Mitigate Co-Channel Interference in Cellular OFDMA Systems  

Kim Dai-Kwan (연세대학교 전기전자공학과 디지털전송 연구실)
Kim Jong-Kyung (연세대학교 전기전자공학과 디지털전송 연구실)
Seo Jong-Soo (연세대학교 전기전자공학과 디지털전송 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.6A, 2006 , pp. 603-610 More about this Journal
Abstract
This paper considers the problem of mitigating CCI(Co-channel Interference) in cellular OFDMA downlink systems. The users in the cell-edge area suffer from large CCIs, and their SINR requirements are hard to be maintained. To guarantee their QoS, we propose a new exclusive sub-carrier allocation and power control algorithm. The performance of the proposed two-step algorithm is simulated in SUI-A path-loss model, and it is compared with that of the conventional algorithm. The simulation results show that the data transmission rate in the cell-edge area was increased by 600Kbps within the same power constraint. The results indicate that with proposed algorithm, the data rate stability can be achieved independently of the user location in the cell.
Keywords
OFDMA; multi-cell; resource allocation; CCI;
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