Accurate TOA Estimating UWB-IR Transceiver for Ranging System in Multi-Path Environment

Ryosuke FUJIWARA; Kenichi MIZUGAKI; Goichi ONO; Tatsuo NAKAGAWA; Takayasu NORIMATSU; Takahide TERADA; Akira MAEKI; Masayuki MIYAZAKI

doi:10.1587/transcom.E94.B.777

Regular Section

Accurate TOA Estimating UWB-IR Transceiver for Ranging System in Multi-Path Environment

Ryosuke FUJIWARA, Kenichi MIZUGAKI, Goichi ONO, Tatsuo NAKAGAWA, Takayasu NORIMATSU, Takahide TERADA, Akira MAEKI, Masayuki MIYAZAKI

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Keywords: positioning, ranging, sensor network, ultra wideband impulse radio

JOURNAL RESTRICTED ACCESS

2011 Volume E94.B Issue 3 Pages 777-785

DOI https://doi.org/10.1587/transcom.E94.B.777

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Abstract

In this work, an ultra-wideband impulse radio (UWB-IR) transceiver with accurate time-of-arrival (TOA) estimation for a ranging/positioning system was developed for wireless sensor network applications. The system uses an impulse radio characterized by a low duty cycle and direct-sequence spreading, which enable very precise ranging and good receiver sensitivity. An algorithm enabling the TOA of the first-path signal to be measured accurately in a multi-path environment with simple, low-power and low cost implementations was proposed. UWB chips with CMOS 0.18-µm technology and UWB transceiver modules performed that the accuracy of the proposed ranging system is 18.5cm in a closed space.

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