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IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 2008 E91-A(1):430-432; doi:10.1093/ietfec/e91-a.1.430
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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Letter -- Spread Spectrum Technologies and Applications

A Simple Asynchronous UWB Position Location Algorithm Based on Single Round-Trip Transmission*

Suckchel YANG1, Dongwoo KANG1, Young NAMGOONG1 and Yoan SHIN1

1 The authors are with School of Electronic Engineering, Soongsil University, 1 Sangdo-dong, Dongjak-gu, Seoul, 156-743 Korea. E-mail: yashin{at}e.ssu.ac.kr


  Abstract

We propose a simple asynchronous UWB (Ultra Wide Band) position location algorithm with low complexity, power consumption and processing delay. In the proposed algorithm, only a single RTTX (Round-Trip Transmission) of UWB pulses is utilized based on the ToA (Time of Arrival) principle. Hence, the proposed algorithm decreases power consumption and processing delay as compared to the basic ToA based on triple RTTXs. Moreover, unlike the TDoA (Time Difference of Arrival) algorithm, the proposed algorithm can perform the position location with low complexity since it does not require strict synchronization between multiple beacons. Simulation results using IEEE 802.15.4a UWB channel models reveal that the proposed algorithm achieves closely comparable position location performance of the basic ToA and TDoA algorithms.

Key Words: UWB, position location, ToA (Time of Arrival), RTTX (Round-Trip Transmission), RTT (Round-Trip Time), TDoA (Time Difference of Arrival)

Manuscript received July 31, 2006. Manuscript revised July 31, 2007.

* This work was financially supported by Seoul R&BD Program (No. 10544), Republic of Korea.


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