Performance Enhancement of an OFDMA/CDM-based Cellular System in a Multi-Cell Environment 


Vol. 30,  No. 7, pp. 587-596, Jul.  2005


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  Abstract

In this paper, we propose an OFDMA/CDM-based cellular system, which accommodates multiple users in frequency-domain and multiplexes user data with frequency-domain spreading. The proposed system utilizes random codes to discriminate cells and adopts the pre-equalization to enhance the performance. For cellular applications, a number of pre-equalization techniques are compared and an efficient power allocation scheme is suggested with a transmit power constraint. Especially, the validity of OFDMA/CDM based cellular system is investigated, by comparing the performance for varying the number of multiplexed data symbols at different locations. Finally the pre/post-equalization is proposed to reduce the performance degradation caused by time delay.

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  Cite this article

[IEEE Style]

D. K. Kim, J. H. Ryu, B. S. Jeong, "Performance Enhancement of an OFDMA/CDM-based Cellular System in a Multi-Cell Environment," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 7, pp. 587-596, 2005. DOI: .

[ACM Style]

Duk Kyung Kim, Je Hun Ryu, and Bu Seop Jeong. 2005. Performance Enhancement of an OFDMA/CDM-based Cellular System in a Multi-Cell Environment. The Journal of Korean Institute of Communications and Information Sciences, 30, 7, (2005), 587-596. DOI: .

[KICS Style]

Duk Kyung Kim, Je Hun Ryu, Bu Seop Jeong, "Performance Enhancement of an OFDMA/CDM-based Cellular System in a Multi-Cell Environment," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 7, pp. 587-596, 7. 2005.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880