| 多普勒频移环境中水声通信伪随机码快速捕获方法 |
| |
| 引用本文： | 黄晓砥,宫在晓.多普勒频移环境中水声通信伪随机码快速捕获方法[J].应用声学,2004,23(6):24-30. |
| |
| 作者姓名： | 黄晓砥 宫在晓 |
| |
| 作者单位： | 中国科学院声学研究所声场声信息国家重点实验室,北京,100080 |
| |
| 基金项目： | 中国科学院声学研究所所长择优基金资助项目(S2004-08) |
| |
| 摘 要： | 伪随机码应用于水声通信时，需解决接收信号在多普勒频移情况下的快速捕获问题。本文在全数字通讯系统的框架内，提出了基带信号相关检测的数字下移频算法，显著减小了计算量，并针对数字处理的灵活性，提出了多普勒频移的概率搜索策略，根据多普勒频移的分布概率来对其进行搜索，进一步减小多普勒频移搜索的计算量。
|
| 关 键 词： | 多普勒频移 水声通信 快速捕获 伪随机码 基带信号 接收信号 相关检测 搜索策略 算法 计算量 |
A new PN code acquisition algorithm for underwater communication in high doppler environment |
| |
| HUANG Xiao-Di and GONG Zai-Xiao.A new PN code acquisition algorithm for underwater communication in high doppler environment[J].Applied Acoustics,2004,23(6):24-30. |
| |
| Authors: | HUANG Xiao-Di and GONG Zai-Xiao |
| |
| Institution: | National Laboratory of Acoustics, Institue of Acoustics, Chinese Academy of Science, Beijing 100080;National Laboratory of Acoustics, Institue of Acoustics, Chinese Academy of Science, Beijing 100080 |
| |
| Abstract: | It is inevitable that the spread spectrum system of underwater communication will face the difficulty of the PN code acquisition in high Doppler environment. A new approach, which can be used in Software Defined Radio, can reduce the amount of calculation. This approach consists of two parts. One is a new type of DDC (Digital Down Converter) which shifts the signal in the frequency domain and cuts short the length in frequency domain. The other is a probability strategy to reduce the amount of the Doppler shifts searching. |
| |
| Keywords: | derwater communication Doppler shift PN code Search strategy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《应用声学》浏览原始摘要信息 |
| 点击此处可从《应用声学》下载免费的PDF全文 |
