| 宽带信号检测中自适应门限设定方法 |
| |
| 引用本文： | 张学森,郭霖,孔繁慧,冯海泓. 宽带信号检测中自适应门限设定方法[J]. 声学技术, 2011, 30(2): 183-187 |
| |
| 作者姓名： | 张学森 郭霖 孔繁慧 冯海泓 |
| |
| 作者单位： | 1. 中国科学院声学研究所东海研究站,上海,200032;中国科学院研究生院,北京,100049
2. 中国科学院声学研究所东海研究站,上海,200032 |
| |
| 摘 要： | 在水声定位中,常常需要估计声波从发射端到接收端的传输时间。但由于传输距离的影响,接收到的声波信号强度变化范围很大,给检测带来不便。基于线性调频脉冲信号相关检测,提出了一种自适应门限设定方法,可以在一定的条件下替代自动增益控制电路。这一方法根据发射信号、传输信道、发射系统和接收系统的参数,依据声信号到达接收端的时刻,自动调整相关峰检测时的门限值,简便易行。仿真和湖上试验结果表明,这一方法可以有效地保证计算信号到达时刻的准确性。
|
| 关 键 词： | 水声定位 线性调频脉冲信号 自适应门限 自动增益控制 |
| 收稿时间： | 2010-04-18 |
| 修稿时间： | 2010-07-28 |
Adaptive threshold setting for wideband signal detection |
| |
| ZHANG Xue-sen,GUO Lin,KONG Fan-hui and FENG Hai-hong. Adaptive threshold setting for wideband signal detection[J]. Technical Acoustics, 2011, 30(2): 183-187 |
| |
| Authors: | ZHANG Xue-sen GUO Lin KONG Fan-hui FENG Hai-hong |
| |
| Affiliation: | ZHANG Xue-sen1,2,GUO Lin1,KONG Fan-hui1,FENG Hai-hong1(1.Shanghai Acoustics Laboratory,Chinese Academy of Sciences,Shanghai 200032,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
| |
| Abstract: | The transmission time of acoustic wave between transmitter and receiver needs to be estimated in underwater acoustic positioning.Because of the influence of transmission distance,the amplitude of receiving signal varies greatly,which is unfavorable for signal detection.Base on the correlation detection of liner frequency modulated pulse signal,a method of adaptive threshold setting is proposed,which can replace the automatic gain control circuit in some conditions.This method can set threshold of correlatio... |
| |
| Keywords: | underwater acoustic positioning liner frequency modulated pulse signal adaptive threshold automatic gain control |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《声学技术》浏览原始摘要信息 |
|
点击此处可从《声学技术》下载免费的PDF全文 |
|
