NDLI: Indoor positioning utilizing fractional-N PLL synthesizer and multi-channel base stations

Content Provider	IEEE Xplore Digital Library
Author	Gierlich, R. Huttner, J. Ziroff, A. Huemer, M.
Copyright Year	2008
Description	Author affiliation: Inst. for Networked & Embedded Syst., Univ. of Klagenfurt, Klagenfurt (Huemer, M.) \|\| Siemens AG, Wireless Sensors & RF-Technol., Munich (Gierlich, R.; Huttner, J.; Ziroff, A.)
Abstract	An indoor positioning system operating in the 5.8 GHz ISM-band is presented. The system principle is based on time-difference of arrival (TDoA) measurements by means of frequency modulated continuous wave (FMCW) signals. We briefly outline the measurement principle and system topology. Furthermore, we present a localizable tag hardware that features a novel integrated fractional-N PLL synthesizer for frequency ramp generation. The synthesizer IC has been designed within the Resolution project with the objective of low-power and inexpensive signal generation. The second focus of this paper is on measurement results that have been obtained using the integrated synthesizer in combination with a 4-channel base station. Due to the constricted signal bandwidth of 150 MHz, multipath propagation sets tight limits on ranging accuracy. By application of digital beam-forming techniques on the infrastructure side, we could significantly decrease the impact of channel echoes on accuracy compared with conventional single-channel systems.
Starting Page	49
Ending Page	52
File Size	460552
Page Count	4
File Format	PDF
ISBN	9782874870088
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-27
Publisher Place	Netherlands
Access Restriction	Subscribed
Rights Holder	EUROPEAN MICROWAVE ASSOCI
Subject Keyword	Integrated circuit synthesis Base stations Frequency synthesizers Frequency modulation Hardware Frequency measurement Topology Phase locked loops Signal design Signal resolution
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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