摘要
针对浅海水声通信中水汽界面和海底的反射产生多途效应对信号传输的影响,依据水下声传输原理,分析了水声信道中的噪声特点和产生多途效应机理,研究水声信道中声传感器指向性与传输性能关系,探讨水声传感阵列方式在水下通信环境的优势,设计合理的阵元间连接形式、阵列驱动电路和阻抗匹配电路,保证有效的功率耦合效率。经水下试验测试表明:采用一定指向性的声阵列结构,利用单个阵元波束宽度小于10°,构成阵列结构的波束宽度小于30°,并进行一定阻抗匹配,可减小能量损失,有效提高水声通信系统性能。
According to the multipath effect caused by the surface reflection and bottom reflection in shallow water acoustic communication,we analysis the noise in the ocean and the mechanism of multipath effect,study the relationship between the direc- tional acoustic sensor and transmission performance in underwater acoustic channel, and discuss the advantage of underwater acoustic sensor array mode in underwater environment.In order to guarantee the effective power coupling , we design the appropriate connect- ing form of the elements,array driving circuit and impedance-matching circuit.The underwater experimental results show that the performance of underwater acoustic communication can be more effective with part directional acoustic array,the beamwidth of single element is less than 10°, and the beamwidth of array is less than 30°.
出处
《电子技术应用》
北大核心
2014年第4期116-119,共4页
Application of Electronic Technique
基金
国家自然科学基金资助项目(60177036)
关键词
水声通信
海洋环境噪声
多途效应
指向性
阵列驱动
underwater acoustic communication
noise in the ocean
multipath effect
directivity
array driving
