J4 ›› 2010, Vol. 37 ›› Issue (4): 716-721.doi: 10.3969/j.issn.1001-2400.2010.04.024

• 研究论文 • 上一篇    下一篇

一种简单的UWB-TOA估计方法

熊海良1;汪俊1;田红心1;杨宏1,2;易克初1
  

  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071;
    2. 中国空间技术研究院总体部,北京  100094)
  • 收稿日期:2009-09-09 出版日期:2010-08-20 发布日期:2010-10-11
  • 通讯作者: 熊海良
  • 作者简介:熊海良(1981-),男,西安电子科技大学博士研究生,E-mail: hlxiong@mail.xidian.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(60572148,60702060);高等学校学科创新引智计划资助项目(B08038)

Simple UWB-TOA estimation method

XIONG Hai-liang1;WANG Jun1;TIAN Hong-xin1;YANG Hong1,2;YI Ke-chu1   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. China Academy of Space Technology, Beijing  100094, China)
  • Received:2009-09-09 Online:2010-08-20 Published:2010-10-11
  • Contact: XIONG Hai-liang

摘要:

为实现简单而高效的超宽带精确测距定位,提出了一种低复杂度UWB-TOA估计方法.利用多相滤波来实现高精度采样恢复,克服了传统方法需要采样时钟速率达几十吉赫兹、AD芯片无法实现、FPGA芯片无法接收和处理这样高速而大量采样数据的问题,为专用超宽带定位芯片的实现和市场化发展奠定了基础.理论分析和仿真实验表明,所提方案可实现短距离精确定位,误差可达厘米级,且数据处理总量及计算复杂度较相干检测的到达时间估计至少下降一个数量级.

关键词: 超宽带, 测距定位, 到达时间估计, 多相滤波器

Abstract:

We propose a novel UWB-TOA estimation method. High-precision sample recovery is achieved using the polyphase filter, overcoming the shortcomings of the traditional method which needs the sampling data speeds up to tens of GHz to achieve high-precision positioning, conquering the bottlenecks of AD-chip hardly implemented, and the FPGA chips fail to receive and deal with such a large number of high-speed sampling data. The proposed scheme has laid a foundation of implementation and market development of UWB positioning chips. Theoretical analysis and simulation show that the proposed scheme can achieve precise positioning in short distances, that the location error can reach the centimeter level, and that the computational complexity is largely reduced compared with the coherent detection TOA estimation.

Key words: ultra wideband, positioning, time of arrival(TOA) estimation, polyphase filter