水声信号自动增益控制及幅值恢复电路设计实现  

Research on automatic gain control and amplitude restore circuit for underwater acoustic signal

作　　者：苗康乐[1] 杨成伟[1] 杨日杰[1] 刘家祺[2] 

机构地区：[1]海军航空工程学院电子信息工程系 [2]中国人民解放军92768部队

出　　处：《国外电子测量技术》2010年第10期75-77,共3页Foreign Electronic Measurement Technology

摘　　要：针对水声信号动态范围大、噪声干扰强的特点,研制了水声信号自动增益控制(AGC)及幅值恢复电路。电路以数控衰减技术完成对大动态范围信号的接收和处理,以功率比较和窄带带通滤波技术屏蔽和滤除噪声对系统的干扰。经水下实验结果表明,该电路具有精度高、抗干扰能力强、工作稳定等优点。Considering the specific features of underwater acoustic signal such as large dynamic range and intense background noise, presented this automatic gain control（AGC） and amplitude restore circuit for underwater acoustic signal receiving systems. The circuit is enabled to receive and process large dynamic range signal by digitally controlled attenuation technology. The interference of background noise is shielded and filtered by power comparing and narrowband bandpass filter technology. The results of underwater experiments shows several advantages of this circuit as high precision, noise immunity and stability.

关 键 词：自动增益控制 幅值恢复 窄带带通滤波 

分 类 号：TN97[电子电信—信号与信息处理] TP274[电子电信—信息与通信工程]