Efficient Cognitive and Cooperative Communication Scheme for Multiuser OFDMA Systems using Relays 


Vol. 34,  No. 3, pp. 235-243, Mar.  2009


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  Abstract

In this paper, we investigate the cognitive and cooperative communication scheme to improve the spectral efficiency in multiuser OFDMA systems using wireless relays. First, we propose the frame structure in which the efficient frequency reuse scheme with the cognitive technique is performed to increase the system throughput. And in the case where the THP (Tomlinson-Harashima precoding) is used for the elimination of interference from the relay, we derive the effective signal to noise ratio of the link largely affected by the channel quantization error. From the system level simulation results, it is shown that the proposed cognitive and cooperative communication scheme increases the overall system performance including the feedback overhead.

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  Cite this article

[IEEE Style]

M. Kang, Y. Sang, B. H. Ko, K. S. Kim, "Efficient Cognitive and Cooperative Communication Scheme for Multiuser OFDMA Systems using Relays," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 235-243, 2009. DOI: .

[ACM Style]

Mingyu Kang, Young-Jin Sang, Byung Hoon Ko, and Kwang Soon Kim. 2009. Efficient Cognitive and Cooperative Communication Scheme for Multiuser OFDMA Systems using Relays. The Journal of Korean Institute of Communications and Information Sciences, 34, 3, (2009), 235-243. DOI: .

[KICS Style]

Mingyu Kang, Young-Jin Sang, Byung Hoon Ko, Kwang Soon Kim, "Efficient Cognitive and Cooperative Communication Scheme for Multiuser OFDMA Systems using Relays," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 235-243, 3. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880