摘要
介绍一种适用于移动水声跳频通信接收系统的幅度均衡电路,电路采用初级放大—滤波—次级放大(反馈至初级放大)的闭环信号调理机制,可将调理后的输出信号稳定在某期望量值附近,能有效解决移动水声跳频通信中由于收发端相对距离变化、声传播衰减、信道频率选择性衰落、收发端电路频率响应不均匀等因素引起的接收声信号幅度随频率大起伏变化的问题.海上试验结果表明,该电路具备良好的幅度均衡性能,能大幅度提高信号检测准确度,明显提高水声通信质量.
The paper presents an amplitude equalization circuit for the frequency hopping receiving system of underwater acoustic mobile communication.The circuit is composed of a primary amplification circuit,bandpass filter and a secondary amplification circuit feeding back to the primary amplification circuit.For the closed-loop mechanism,the conditioning signal output has a stable ampli-tude,so the circuit can effectively solve the problem of signal amplitude fluctuation with frequency caused by the distance change be-tween transmitter and receiver,propagation attenuation,frequency selective fading of underwater acoustics channel and the uneven frequency response of transmitting and receiving circuit.The comparative experiments in the field of Wuyuan Bay show that the cir-cuit has a good performance at amplitude equalization,and can greatly improve the signal detection accuracy to improve the quality of underwater acoustic communication.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第4期575-579,共5页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金(41376040)
福建省中青年教师教育科研项目(JA15001)
关键词
水下移动通信
跳频技术
幅度均衡
underwater acoustic mobile communication
frequency hopping
amplitude equalization
