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An Asynchronous UWB Positioning Scheme with Low Complexity and Low Power Consumption  

Kim, Jae-Woon (숭실대학교 정보통신전자공학부 통신및정보처리연구실)
Park, Young-Jin (한국전기연구원 전기정보망연구센터)
Lee, Soon-Woo (한국전기연구원 전기정보망연구센터)
Shin, Yo-An (숭실대학교 정보통신전자공학부 통신및정보처리연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.11C, 2009 , pp. 1098-1105 More about this Journal
Abstract
In this paper, we propose an asynchronous UWB (Ultra Wide Band) Positioning scheme that can provide precise positioning performance with low complexity and low power consumption. We also present the residual test to improve the positioning performance in multipath channels having heavy NLoS (Non-Line of Sight) components. As compared to conventional ToA (Time of Arrival) positioning scheme that requires round-trip transmissions as many as the number of beacons, the proposed UWB positioning scheme effectively decrease power consumption and processing delay since a single round-trip transmission is only required. Also, as compared to conventional TDoA (Time Difference of Arrival) positioning scheme requiring precise synchronization among the beacons, asynchronous nature of the proposed scheme achieves very low system complexity. Through simulations in LoS (Line of Sight) channel models, we observe that the proposed scheme requires low system complexity, low power consumption, while providing positioning performance of almost the same accuracy as the conventional ToA and TDoA positioning schemes. In addition, the proposed scheme by employing the residual test achieves accurate positioning performance even in multipath channels having heavy NLoS components.
Keywords
OFDM; PAPR; Companding; HPA; Filtering;
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