文件名称:
pseudo echo ranging-ICIECS-823.doc
开发工具:
文件大小: 336kb
下载次数: 0
上传时间: 2010-12-16
详细说明： 描述了一种测距方法，给出了具体算法。 According to the characteristics of wireless sensor networks, a novel ranging method is proposed based on measuring propagation time of acoustic signal modulated with pseudo-random number through binary phase shift keying (BPSK) and flying to and fro between two sensor nodes in a wireless sensor network. A node, that launches a ranging process and is called active node, sends modulated acoustic signal to another node which demodulates the acoustic signal received from the active node, gets the pseudo-random nu mber sequence carried by the acoustic signal, regenerates the received acoustic signal with the pseudo-random number sequence, then sends it back to the active node and is called target node. The active node measures the time delay between the acoustic signal it sends and the acoustic signal received from the target node and then, taking into account the extra time delay caused by signal demodulation and modulation executed on the target node, estimates the distance between the two nodes. Precise time synchronization is not needed. The target node does not need to know in advance the pseudo-random number sequence sent by the active node. The active node, using cross-correlation function and the pseudo-random number sequences carried by the acoustic signals, determines the scope of general time delay firstly and then computes the precise value of the time delay in this scope. So the computational complexity or workload of the algorithm of this ranging method is much smaller than usually to compute all the entire cross correlation function values. ...展开收缩
(系统自动生成,下载前可以参看下载内容)
下载文件列表
相关说明
- 本站资源为会员上传分享交流与学习,如有侵犯您的权益,请联系我们删除.
- 本站是交换下载平台，提供交流渠道，下载内容来自于网络，除下载问题外，其它问题请自行百度。
- 本站已设置防盗链，请勿用迅雷、QQ旋风等多线程下载软件下载资源，下载后用WinRAR最新版进行解压.
- 如果您发现内容无法下载，请稍后再次尝试；或者到消费记录里找到下载记录反馈给我们.
- 下载后发现下载的内容跟说明不相乎，请到消费记录里找到下载记录反馈给我们，经确认后退回积分.
- 如下载前有疑问，可以通过点击"提供者"的名字，查看对方的联系方式，联系对方咨询.
