Transmit Power and Subcarrier Allocation Schemes for Downlink OFDM Systems with Multiple Relays 


Vol. 34,  No. 3, pp. 281-289, Mar.  2009


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  Abstract

Wireless relay attracts great attention as a core technology of next generation wireless communication systems since it enables reliable communications and extends cell coverage by supporting shadowed users. In this paper, we propose transmit power and subcarrier allocation scheme for downlink OFDM systems with multiple decode and forward (DF) relays to increase data rate with fixed bit error rate (BER) and sum power constraint. In simulation results, average data rate based on the proposed schemes are evaluated and compared to that of the other schemes. It is also shown that the performance loss of the proposed scheme is negligible compared to the optimal scheme, while its computational complexity is reduced considerably.

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  Cite this article

[IEEE Style]

H. W. Je, I. H. Kim, K. B. Lee, "Transmit Power and Subcarrier Allocation Schemes for Downlink OFDM Systems with Multiple Relays," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 281-289, 2009. DOI: .

[ACM Style]

Hui Won Je, Ik Hyun Kim, and Kwang Bok Lee. 2009. Transmit Power and Subcarrier Allocation Schemes for Downlink OFDM Systems with Multiple Relays. The Journal of Korean Institute of Communications and Information Sciences, 34, 3, (2009), 281-289. DOI: .

[KICS Style]

Hui Won Je, Ik Hyun Kim, Kwang Bok Lee, "Transmit Power and Subcarrier Allocation Schemes for Downlink OFDM Systems with Multiple Relays," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 281-289, 3. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880