...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of the Acoustical Society of America >The influence of flight speed on the ranging performance of bats using frequency modulated echolocation pulses
【24h】

The influence of flight speed on the ranging performance of bats using frequency modulated echolocation pulses

机译：使用调频回波定位脉冲，飞​​行速度对蝙蝠测距性能的影响

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

Many species of bat use ultrasonic frequency modulated (FM) pulses to measure the distance to objects by timing the emission and reception of each pulse. Echolocation is mainly used in flight. Since the flight speed of bats often exceeds 1% of the speed of sound, Doppler effects will lead to compression of the time between emission and reception as well as an elevation of the echo frequencies, resulting in a distortion of the perceived range. This paper describes the consequences of these Doppler effects on the ranging performance of bats using different pulse designs. The consequences of Doppler effects on ranging performance described in this paper assume bats to have a very accurate ranging resolution, which is feasible with a filterbank receiver. By modeling two receiver types, it was first established that the effects of Doppler compression are virtually independent of the receiver type. Then, used a cross-correlation model was used to investigate the effect of light speed on Doppler tolerance and range-Doppler coupling separately. This paper further shows how pulse duration, bandwidth, function type, and harmonics influence Doppler tolerance and range-Doppler coupling. The influence of each signal parameter is illustrated using calls of several bat species. it is argued that range-Doppler coupling is a significant source of error in bat echolocation, and various strategies bats could employ to deal with this problem, including the use of range rate information are discussed.
机译：许多种类的蝙蝠都使用超声波调频（FM）脉冲通过定时每个脉冲的发射和接收来测量到物体的距离。回声主要用于飞行中。由于蝙蝠的飞行速度通常超过声速的1％，因此多普勒效应将导致发射和接收之间的时间压缩以及回波频率的升高，从而导致感知范围的失真。本文介绍了这些多普勒效应对使用不同脉冲设计的蝙蝠测距性能的影响。本文描述的多普勒效应对测距性能的影响假设蝙蝠具有非常精确的测距分辨率，这对于滤波器组接收器是可行的。通过对两种接收机类型进行建模，首先确定多普勒压缩的效果实际上与接收机类型无关。然后，使用互相关模型分别研究光速对多普勒容差和距离多普勒耦合的影响。本文进一步展示了脉冲持续时间，带宽，函数类型和谐波如何影响多普勒容差和距离多普勒耦合。每个信号参数的影响通过几种蝙蝠的叫声来说明。有人认为，距离多普勒耦合是蝙蝠回声定位误差的重要来源，并且讨论了蝙蝠可以采用的各种策略来解决这个问题，包括距离率信息的使用。

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