Subcarrier-Pairing Scheme for OFDMA based Multi-Hop Cognitive Radio Systems 


Vol. 36,  No. 6, pp. 601-608, Jun.  2011


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  Abstract

In OFDMA(Orthogonal Frequency Division Multiple Access) based multi-hop networks, the subcarrier-pairing scheme using the SNR(Signal-to-Noise Ratio) has been proposed as the best solution. But, this scheme is not optimal in cognitive radio system, because of the power control due to the interference to the primary user. In this paper, we propose two subcarrier-pairing schemes for OFDMA based 2-hop cognitive radio systems. One is the IT(Interference channel gain) scheme considering only the interference channel gain, and the other is the CI(Channel SNR over interference channel gain) scheme considering the ratio of channel SNR to interference channel gain. The results show that the CI scheme has the best performance in which throughput is improved more than 10% in comparison with other schemes.

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  Cite this article

[IEEE Style]

J. Kim, J. Shin, H. Cho, Y. Jang, "Subcarrier-Pairing Scheme for OFDMA based Multi-Hop Cognitive Radio Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 6, pp. 601-608, 2011. DOI: .

[ACM Style]

Jae-hyun Kim, Jungchae Shin, Ho-Shin Cho, and Youn-seon Jang. 2011. Subcarrier-Pairing Scheme for OFDMA based Multi-Hop Cognitive Radio Systems. The Journal of Korean Institute of Communications and Information Sciences, 36, 6, (2011), 601-608. DOI: .

[KICS Style]

Jae-hyun Kim, Jungchae Shin, Ho-Shin Cho, Youn-seon Jang, "Subcarrier-Pairing Scheme for OFDMA based Multi-Hop Cognitive Radio Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 6, pp. 601-608, 6. 2011.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880