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	High-order modulation based on repeat-accumulate codes for underwater acoustic communications
	Zhang, Lan ; Xu, Xiaomei ; Feng, Wei ; Chen, Yougan ; Zhang L(张兰) ; Xu XM(许肖梅) ; Chen YG(陈友淦)
	2011
关键词	Codes (symbols) Communication Computer simulation Fading channels Modulation Telecommunication systems
英文摘要	Conference Name:2011 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2011. Conference Address: Xi'an, China. Time:September 14, 2011 - September 16, 2011.; IEEE Xi'an Section; IEEE Hong Kong Section; Northwestern Polytechnical University; Xidian University; Xi'an Jiaotong University; Several characteristics of underwater acoustic (UWA) communication channels-limited bandwidth, extended multipath and severe fading-impede UWA data transmissions. To solve this problem, we propose to set up a receiver combining repeat-accumulate (RA) coding and high-order modulation, and calculate the channel soft information for RA decoding with high-order modulation. A multipath fading acoustic channel model for the southern Taiwan Strait channel is established based on BELLHOP ray model and its real sound speed profile. The paper also discusses the error correction capability of the different combination of RA coding and high-order modulation. Simulation results show that the system performance may be improved by using error correction coding; however, its data rate will be reduced. While the frequency efficiency grows significantly, the reliability cannot be improved remarkably. ? 2011 IEEE.
语种	英语
出处	http://dx.doi.org/10.1109/ICSPCC.2011.6061604
出版者	IEEE Computer Society
内容类型	其他
源URL	[http://dspace.xmu.edu.cn/handle/2288/85358]
专题	海洋环境－会议论文
推荐引用方式 GB/T 7714	Zhang, Lan,Xu, Xiaomei,Feng, Wei,et al. High-order modulation based on repeat-accumulate codes for underwater acoustic communications. 2011-01-01.

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