MC-CDMA via carrier interferometry codes in an underwater acoustic channel

Authors:
Hui Fang;Xiaoyi Hu;Ru Xu;Fang Xu
Affiliations:
Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen, China
Venue:
ASID'09 Proceedings of the 3rd international conference on Anti-Counterfeiting, security, and identification in communication
Year:
2009

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Abstract

This paper proposes a basic MC-CMDA. via carrier interferometry Codes(CI codes) in an Underwater Acoustic (UWA) Channel. Compared with OFDM in UWAC, it can allow a number of users simultaneously and asynchronously accessing the UWA channel. A trade off relation exists between diversity gain and user capacity as well as between spread spectrum gain and system efficiency. Then diversity combining scheme is discussed. Both simulation and initial tank experiment have proved that the proposed scheme is feasible in UWA channel in a downlink CI/MC-CDMA system.