摘要
提出了M元能量检测器算法,该算法简单易实现,极大优化了M元码分多址系统接收机结构和解码运算量。同时,M元能量检测器具有抗载波相位跳变和抗水声信道多途干扰的能力。针对M元码分多址水声通信系统中所需扩频序列数量庞大、选码难度高的问题,提出了混沌正交组合序列,通过简单的迭代组合即可产生大量满足要求的扩频序列,而且同族的混沌正交组合序列间满足正交关系。海试试验成功实现了7个用户的M元码分多址水声通信试验(M=512),共采用了3 584条混沌正交组合序列,每个用户通信速率为70 bit.s-1,验证了算法的有效性,为网络化水声通信的应用提供了技术基础。
An M-ary energy detector algorithm is proposed. The algorithm is simple and easy to implement, which greatly optimizes the receiver structure and decoding operation of the M-ary code division multiple access (CDMA) system. Also, the M-ary energy detector has the ability to resist carrier phase hopping and multi-channel interference in underwater acoustic channels. To solve the problem of selecting a large number of spreading sequences in M-ary CDMA underwater acoustic communication system, a chaotic orthogonal combination sequence is proposed in this paper, and a large number of spreading sequences satisfying the requirements can be generated through a simple combination of iterations. And, the orthogonal relationship exists between the chaotic orthogonal combination sequences of the same family. In January 2015, a sea trial successfully implemented the M-ary code CDMA Acoustic Communication Test (M=512) for 7 users with a total of 3 584 chaotic orthogonal combination sequences and a communication rate of 70 bit·s^-1, which verifies the validity of the proposed algorithm and provides a technical basis for the application of networked underwater acoustic communications.
出处
《声学技术》
CSCD
北大核心
2018年第1期32-37,共6页
Technical Acoustics
基金
国家自然科学基金资助项目(61701449
61701450
61471137)
关键词
水声通信
M元编码
码分多址
混沌正交组合序列
能量检测器
underwater acoustic communication
M-ary code
code division multiple access
chaotic orthogonal combination sequence
energy detector