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正交M元码元移位键控扩频水声通信
引用本文:于洋, 周锋, 乔钢, 聂东虎. 正交M元码元移位键控扩频水声通信[J]. 声学学报, 2014, 39(1): 42-48. DOI: 10.15949/j.cnki.0371-0025.2014.01.002
作者姓名:于洋  周锋  乔钢  聂东虎
作者单位:1. 哈尔滨工程大学 水声技术重点实验室 哈尔滨 150001;
基金项目:国家青年自然科学基金(11304056);863重点项目(2009AA093601-2);国防基础项目研究(B2420110007);水声技术重点实验室基金(9140C200801110C2004)资助
摘    要:
M元和码元移位键控(CSK)扩频在水声通信中被广泛采用来克服扩频增益对通信速率的限制。为了获得更高的通信速率,文章基于Gold序列较大的码本数量、良好的自相关和互相关特性,提出正交双通道的M元和CSK相结合的水声通信方法。通过公式推导描述了正交M元CSK的调制和解调流程及影响其性能的因素。并且,通过与双通道M元CSK的仿真比较,得到正交M元CSK的误码率曲线。最后,通过实验验证了仿真的有效性。并实现了10 kbits数据量下1096.8 bps通信速率的无误码传输。通过推导、仿真和实验,可以得到这样的结论:正交M元CSK提供了优良的通信性能。

关 键 词:水声通信  通信速率  移位键控  正交双通道  正交载波  误码率  扩频通信  序列  相结合  无误码传输
收稿时间:2012-05-15
修稿时间:2013-04-09

Orthogonal M-ary code shift keying spread spectrum underwater acoustic communication
YU Yang, ZHOU Feng, QIAO Gang, NIE Donghu. Orthogonal M-ary code shift keying spread spectrum underwater acoustic communication[J]. ACTA ACUSTICA, 2014, 39(1): 42-48. DOI: 10.15949/j.cnki.0371-0025.2014.01.002
Authors:YU Yang  ZHOU Feng  QIAO Gang  NIE Donghu
Affiliation:1. Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University Received May 15, 2012;2. College of Computer Science and Technology, Harbin Engineering University Received May 15, 2012
Abstract:
M-ary and code shift keying (CSK) spread spectrum is generally applied to overcome the spreading gain versus data rate limitation in underwater acoustic (UWA) communication. In addition, the concept of orthogonal M-ary CSK is introduced to UWA communication to gain higher rate. We propose a scheme employing double orthogonal channel M-ary and CSK spread spectrum UWA communication based on Gold sequences owing to its large set, good self and cross correlation. The modulation and demodulation scheme of orthogonal M-ary CSK and the factor which is critical to its performance is described by formula. Furthermore, its bit error rate (BER) curve is investigated via simulation and compared with double channel M-ary CSK. Finally, the validity of simulation is verified in experiment. 1096.8 bps data rate of the proposed communication scheme is realized in 10 kbits volume with no error. It is shown that the proposed method offers significantly improved performance through deduction, simulation, experiment and numerical results. 
Keywords:
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