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Proceedings Paper

Code acquisition with adaptive threshold for TH-UWB systems
Author(s): Jiachi Wang; Xiulin Hu; Yunyu Zhang
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Paper Abstract

In this paper, we present a pseudonoise(PN) code acquisition scheme with adaptive threshold for Ultra Wideband(UWB) digital receivers, in which Time Hopping(TH) was introduced to allow for multi-user access(MA). The adaptive threshold setting is based on a so-called constant false alarm rate(CFAR) criterion, which will provide small probability of false alarm and large probability of signal detection compared with the fixed threshold algorithm. The noise and interference are estimated by integrating the total received signal power. The performance of the proposed acquisition scheme is analytically evaluated in terms of the detection probability Pd, the false alarm probability Pfa, the mean acquisition time TMA. Analysis in theory and numerical results show that the proposed scheme may actually perform somewhat better than the fixed threshold schemes.

Paper Details

Date Published: 4 January 2006
PDF: 5 pages
Proc. SPIE 5985, International Conference on Space Information Technology, 59852G (4 January 2006); doi: 10.1117/12.657672
Show Author Affiliations
Jiachi Wang, Huazhong Univ. of Science and Technology (China)
Xiulin Hu, Huazhong Univ. of Science and Technology (China)
Yunyu Zhang, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 5985:
International Conference on Space Information Technology
Cheng Wang; Shan Zhong; Xiulin Hu, Editor(s)

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