IR-UWB系统中基于归一化门限的TOA估计

doi:10.13190/j.jbupt.2015.04.005

北京邮电大学学报 ›› 2015, Vol. 38 ›› Issue (4): 19-23.doi: 10.13190/j.jbupt.2015.04.005

IR-UWB系统中基于归一化门限的TOA估计

翟双^1,2, 钱志鸿¹, 王雪¹, 孙大洋¹

1. 吉林大学通信工程学院, 长春 130012;
2. 长春工业大学计算机科学与工程学院, 长春 130012

出版日期:2015-08-28 发布日期:2015-07-03
作者简介:翟双(1978-),女,博士生,E-mail:zhaishuang@ccut.edu.cn;钱志鸿(1957-),男,教授,博士生导师.
基金资助:
国家自然科学基金项目(61071073)

TOA Estimation based on Normalized Threshold for IR-UWB Systems

ZHAI Shuang^1,2, QIAN Zhi-hong¹, WANG Xue¹, SUN Da-yang¹

1. College of Communication Engineering, Jilin University, Changchun 130012, China;
2. Institute of Computer Science and Engineering, Changchun University of Technology, Changchun 130012, China

Online:2015-08-28 Published:2015-07-03

摘要/Abstract

摘要：

在基于能量检测的脉冲超宽带测距算法中,如何提高测距精度始终是研究热点.提出一种基于门限比较的两步积分到达时间(TOA)估计算法及相应的门限设置算法.考虑到长积分周期门限比较(TC)算法的测距精度低于短周期,在前者基础上重新进行短周期积分检测,构成两步积分TOA估计算法;根据最优归一化门限与能量采样序列最大值均值比(AMMR, advanced maximum energy sample to mean ratio)的函数关系,提出基于AMMR值的门限设置算法(AMMR-TC),实现了最优归一化门限值的设置.由于短积分周期下,AMMR-TC的性能稍弱于基于能量序列最大最小值比的(MMR-TC)算法,提出将AMMR-TC与均值-门限比较(MEAN-TC)相结合的AMMR-MEAN-TC算法.仿真分析结果表明测距精度均有一定提高.

关键词: 脉冲超宽带, 门限比较, TOA估计

Abstract:

The impulse radio-ultra wideband (IR-UWB) ranging algorithm based on energy detection is widely applied, improving ranging accuracy turns out to be a key point that draws many researchers' attentions. A new two-step-integral time of arrival (TOA) estimation algorithm based on threshold comparison (TC) was proposed, and the corresponding threshold-setting algorithm was also put forward. The ranging accuracy of the TC algorithm for long integration period is lower than that, for short, the two-step-integral TOA estimation algorithm is built up by one more short integration period detection based on long integration period; according to the functional relation between the optimal normalized threshold and advanced maximum energy sample to mean ratio-TC) (AMMR-TC) is proposed and the optimal normalized threshold is set. Due to the performance of AMMR-TC is worse than maximum to minimum energy sample ratio-TC (MMR-TC) a little in short integration period, a novel AMMR-MEAN-TC algorithm is put forward in the paper by combining the two algorithms above. Simulations indicate that the ranging accuracy had been improved.

Key words: impulse radio-ultra wideband, threshold comparison, TOA estimated

翟双, 钱志鸿, 王雪, 孙大洋. IR-UWB系统中基于归一化门限的TOA估计[J]. 北京邮电大学学报, 2015, 38(4): 19-23.

ZHAI Shuang, QIAN Zhi-hong, WANG Xue, SUN Da-yang. TOA Estimation based on Normalized Threshold for IR-UWB Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2015, 38(4): 19-23.

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IR-UWB系统中基于归一化门限的TOA估计

TOA Estimation based on Normalized Threshold for IR-UWB Systems

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