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

Duk-Kyung KIM  Je-Hoon RYU  

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B   No.1   pp.223-226
Publication Date: 2006/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.1.223
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDMA/CDM,  multi-cell,  

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Summary: 
In this letter, we propose an OFDMA/CDM-based cellular system, which accommodates users in different frequency bands and multiplexes user data symbols with frequency domain spreading. The proposed system utilizes random codes to discriminate between cells and adopts the pre-equalization to enhance the performance. An efficient power allocation scheme is suggested for cellular applications with a transmit power constraint. In particular, the validity of the OFDMA/CDM-based cellular system is examined, by investigating its performance as a function of the number of multiplexed data symbols at different locations.