Radio localization in OFDM networks using the “round trip phase”

Author

Ohlemueller, Thilo ; Winkler, Frank ; Grass, Eckhard

Author_Institution

Humboldt Univ. Berlin, Berlin, Germany

fYear

2010

fDate

11-12 March 2010

Firstpage

23

Lastpage

27

Abstract

In this paper, we present a localization technique for wireless nodes using OFDM modulation. It enables a wireless transceiver to calculate the distance to a second transceiver by measuring the round trip time of flight at the physical layer. The method was first modeled and simulated in MatLab for a 5 GHz according to the IEEE 802.11a standard and a 60 GHz wireless OFDM network with 400 MHz bandwidth. The simulation shows an accuracy of about 2 - 4 m mean absolute error in the 5 GHz network and 10 - 30 cm mean absolute error in the 60 GHz network. A demonstrator for the 5 GHz network was implemented on an FPGA board with a wireless front end. The achieved accuracy is up to submeter range.

Keywords

OFDM modulation; radio transceivers; IEEE 802.11a standard; OFDM modulation; OFDM networks; physical layer; radio localization; round trip phase; wireless OFDM network; wireless nodes; wireless transceiver; Accuracy; Antenna measurements; Antennas and propagation; Bandwidth; Correlation; OFDM; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Positioning Navigation and Communication (WPNC), 2010 7th Workshop on

Conference_Location

Dresden

Print_ISBN

978-1-4244-7158-4

Type

conf

DOI

10.1109/WPNC.2010.5653771

Filename

5653771