Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2015, Vol. 38 ›› Issue (4): 19-23.doi: 10.13190/j.jbupt.2015.04.005

• Papers • Previous Articles     Next Articles

TOA Estimation based on Normalized Threshold for IR-UWB Systems

ZHAI Shuang1,2, QIAN Zhi-hong1, WANG Xue1, SUN Da-yang1   

  1. 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

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