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Adaptive sub-carriers control scheme for OFDM cellular systems

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3 Author(s)
F. Kojima ; Commun. Res. Lab., Minist. of Posts & Telecommun., Kanagawa, Japan ; H. Harada ; M. Fujise

This paper proposes a control scheme that can achieve high bit rate transmission and high system capacity in the OFDM cellular system. The proposed system controls a transmitting rate of each user by selecting the number of available OFDM sub-carriers according to the traffic conditions adaptively. When the traffic is low, the proposed system can achieve high bit rate transmission with larger number of sub-carriers. On the other hand, when traffic is high, the proposed system can prevent service quality degradation due to interference among users by using fewer sub-carriers and conducting TDM transmission. Computer simulation confirms that the proposed system can achieve high capacity without degrading service quality

Published in:

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st  (Volume:2 )

Date of Conference: