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Speed-aware resource allocation and transmission scheme for the uplink channel of highly mobile MC-CDMA systems

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2 Author(s)
Loyola, L. ; NTT Access Network Service Syst. Laboratories, NTT Corp., Yokosuka, Japan ; Miki, T.

We propose a new transmission and resource allocation technique based on multicarrier direct-sequence CDMA (MC-DS-CDMA). The proposed system allocates subcarriers and spreading codes to users by considering their current bandwidth requirements and frequency shifts caused by their movement. Through the use of low-correlation spreading codes in close subcarriers the scheme reduces the inter-carrier interference generated by high-speed users while keeping the inter-symbol interference at a low level due to the multicarrier transmission. The analysis and results show that a substantial mitigation of both the intercarrier interference and bit error ratio, without reducing the system bandwidth efficiency, can be achieved. That makes our proposed method a good candidate for future broadband highly-mobile networks.

Published in:

Communications, 2004 and the 5th International Symposium on Multi-Dimensional Mobile Communications Proceedings. The 2004 Joint Conference of the 10th Asia-Pacific Conference on  (Volume:1 )

Date of Conference:

29 Aug.-1 Sept. 2004

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