文章摘要
黄淳,李颂文.锁定放大技术在参量接收阵中的应用[J].声学技术,2014,33(2):180~183
锁定放大技术在参量接收阵中的应用
Application of lock-in amplifier technique in parametric acoustic receiving array
投稿时间:2012-12-16  修订日期:2013-03-29
DOI:10.3969/j.issn1000-3630.2014.02.018
中文关键词: 锁定放大技术  参量接收阵  微弱信号探测
英文关键词: lock-in Amplifier technique  parametric acoustic receiving array  weak signal detection
基金项目:
作者单位E-mail
黄淳 水声对抗技术重点实验室, 上海 201108
上海船舶电子设备研究所, 上海 201108 
pure0304@sina.com 
李颂文 水声对抗技术重点实验室, 上海 201108
上海船舶电子设备研究所, 上海 201108 
 
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中文摘要:
      为抑制泵波影响,提取参量接收阵中的微弱差频信号,根据微弱信号探测原理,设计了一个基于锁定放大技术的参量接收阵系统。简要介绍了参量接收阵原理,详细描述了锁定放大技术,以及所设计的参量接收阵系统的工作过程,给出泵波比差频高130 dB时的仿真数据。结果表明,采用锁定放大技术后的参量接收阵系统可对接收的差频信号优化约5 dB。
英文摘要:
      In order to suppress the effect of pump signal on picking up the weak difference-frequency signal in the parametric acoustic receiving array, and according to the principle of weak signal detection, a new kind of parametric receiving system is designed on the basis of lock-in amplifier technique. The principle of parameter acoustic receiving array is described briefly, and the Lock-in amplifier technique as well as the procedure of the designed system is described in detail with the presented simulation data that pump to difference-frequency signal ratio reaches 130 dB. The result indicates that the use of lock-in amplifier technique in the parametric acoustic receiving array can optimize the difference-frequency signal by 5 dB.
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