摘要
介绍了一种DS/DBPSK调制解调技术方案,该方案采用了具有较强抗干扰、抗衰落和抗多径性能的扩频技术,并结合与信道适应性较好、不需载波恢复的差分相位调制技术,对浅海水声信道造成的干扰进行抑制。在此方法上,基于Visual C(VC)及PC平台设计了一个通用性好的软件水声调制解调系统,利用双缓冲和多线程技术机制实现算法实时处理,同时可通过串口通信提供上层应用接口。实验系统验证了扩频和差分调制技术在浅海水声通信中的性能,为水声组网提供了底层支持。海试实验结果表明了系统的有效性。
In this paper, we present a DS/DBPSK （direct sequence spread spectrum/differential binary phase shift keying）communication technology, which combines anti-multi-path and anti-jamming spread spectrum technology with differential phase modulation, the latter has better channel adaptation and avoids the adoption of phase recover in demodulation. Employing the double-buffer and multi-threading technology to guarantee a real-time processing, a software defined underwater acoustic modem system is designed based on Visual C＋ ＋ and PC. The system is a verification experiment for DS-DBPSK technology in shallow water communication and will support underwater acoustic networks. The experimental results on sea demonstrated the effectiveness of this system.
出处
《海洋科学》
CAS
CSCD
北大核心
2009年第8期72-75,共4页
Marine Sciences
基金
国家自然科学基金项目(10704063)
福建省新世纪优秀人才支持计划项目
