...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Acoustics >Experimental demonstration of spread spectrum communication over long range multipath channels
【24h】

Experimental demonstration of spread spectrum communication over long range multipath channels

机译：远程多径信道上扩频通信的实验演示

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents a spread spectrum scheme, which is designed for long range underwater acoustic communications of low signal-to-noise ratios. This scheme uses two maximum length sequences, which are overlapped in time. One is used as a time reference, and the other applies code cyclic shift keying (CCSK) to carry information. Compared with conventional spread spectrum techniques, CCSK achieves a higher spectral efficiency, and this property is of significance in spread spectrum communications. With the help of a time reference, performance impairment from timing errors for CCSK is reduced, as each CCSK symbol has its own time reference. For this scheme, three receiver structures are presented, and they are: (1) correlation receiver, (2) passive-phase conjugation receiver, and (3) time reversal receiver structures. A recent sea experiment was carried out in a range dependent channel over a distance of 10 km. By real data processing, performance of the three receiver structures are compared and discussed. The presented results demonstrate the feasibility of this spread spectrum scheme.
机译：本文提出了一种扩展频谱方案，该方案旨在用于低信噪比的远程水下声通信。该方案使用两个最大长度的序列，它们在时间上重叠。一个用作时间参考，另一个用作代码循环移位键控（CCSK）来携带信息。与传统的扩频技术相比，CCSK具有更高的频谱效率，并且该特性在扩频通信中具有重要意义。借助时间参考，由于每个CCSK符号都有自己的时间参考，因此可以减少CCSK定时错误带来的性能损失。对于该方案，提出了三种接收机结构，它们是：（1）相关接收机，（2）无源相位共轭接收机，（3）时间反转接收机结构。最近在距离范围相关的通道上进行了10 km的海上实验。通过实际数据处理，比较和讨论了三种接收器结构的性能。提出的结果证明了这种扩频方案的可行性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号