Joint TOA and AOA Estimation for UWB Localization Applications

Author

Taponecco, L. ; D´Amico, A.A. ; Mengali, U.

Author_Institution

Dept. of Inf. Eng., Univ. of Pisa, Pisa, Italy

Volume

10

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

2207

Lastpage

2217

Abstract

A joint TOA/AOA estimator is proposed for UWB indoor ranging under LOS operating conditions. The estimator employs an array of antennas, each feeding a demodulator consisting in a squarer and a low-pass filter. Signal samples taken at Nyquist rate at the filter outputs are processed to produce TOA and AOA estimates. Performance is assessed with transmitted pulses with a bandwidth of either 1.5 GHz (type-1 pulses) or 0.5 GHz (type-2 pulses), which correspond to sampling rates of 3 GHz and 1 GHz, respectively. As expected, the estimation accuracy decreases with the pulse bandwidth. Ranging errors of about 10 cm and angular errors of about 1° are achieved at SNR of practical interest with type-1 pulses and two antennas at a distance of 50 cm. With type-2 pulses the errors increase to 35 cm and 3°. Comparisons are made with other schemes discussed in literature.

Keywords

direction-of-arrival estimation; time-of-arrival estimation; ultra wideband communication; LOS operating conditions; Nyquist rate; UWB indoor ranging; UWB localization applications; bandwidth 0.5 GHz; bandwidth 1 GHz; bandwidth 1.5 GHz; bandwidth 3 GHz; demodulator; distance 50 cm; joint TOA-AOA estimator; low-pass filter; squarer; type-1 pulses; type-2 pulses; Antenna measurements; Band pass filters; Estimation; Joints; Noise; Receiving antennas; AOA estimation; TOA estimation; UWB localization applications;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.042211.100966

Filename

5771016