摘要
MC-CDMA技术是正交频分复用和码分多址技术相结合的综合技术,兼有OFDM和CDMA的优点。在水声通信中,由于海洋信道的复杂性,尤其在浅海信道中,存在严重的多途干扰和海洋环境噪声以及严重的时变和空变特性,因此水声信号的衰落很严重。为了在条件恶劣的水下声信道中实现高速可靠通信,将MC-CDMA技术应用于水声通信。该研究分析了MC-CDMA技术的基本原理,并通过仿真MC-CDMA系统和OFDM系统,以及两个系统的水池实验,验证了在水声通信中MC-CDMA系统具有比OFDM系统更好的性能。
Multi-Carrier Code Division Multiple Access（MC-CDMA） is a combination of Orthogonal Frequency Di-vision Multiplexing（OFDM） and Code Division Multiple Access（CDMA）,and has their both advantages.In under-water acoustic communication,there is serious multipath interference,marine environment noise,and space-time va-rying properties,which make the underwater acoustic signals attenuated greatly.MC-CDMA is used in underwater acoustic communication for its high-speed data transmission and reliable performance.In the paper the basic principle of MC-CDMA is analyzed,and it is tested that MC-CDMA has better performance in underwater acoustic communi-cation than OFDM via the simulation for MC-CDMA and OFDM and the experiment in pool.
出处
《声学技术》
CSCD
2010年第4期433-436,共4页
Technical Acoustics
