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Impulse Based TOA Estimation Method Using Non-Periodic Transmission Pattern in LR-WPAN  

Park, Woon-Yong (숭실대학교 정보통신전자공학부 통신 및 신호처리연구실)
Park, Cheol-Ung (숭실대학교 정보통신전자공학부 통신 및 신호처리연구실)
Hong, Yun-Gi (숭실대학교 정보통신전자공학부 통신 및 신호처리연구실)
Choi, Sung-Soo (한국전기연구원 전기정보망기술연구그룹)
Lee, Won-Cheol (숭실대학교 정보통신전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.4A, 2008 , pp. 352-360 More about this Journal
Abstract
Recently Task Group (TG) 4 of the Institute of Electrical and Electronics Engineers (IEEE) 802.15a has been recommended a system with ranging capability in existence of multiple Simultaneous operating piconets (SOPs) as well as low-cost, low-power. According to the ranging service, coherent and non-coherent based ranging schemes using ternary code have been adopted as a standard. However it is hard to estimate an accurate time of arrival (TOA) in case of using direct sequence based TOA estimation method because pulse repetition interval (PRI) offered by TG is more limited than the maximum excess delay (MED) of channel. To mitigate inter pulse interference (IPI) problem, this paper proposes a non-coherent TOA estimation scheme using non-periodic transmission (NPT) pattern. The proposed receiver is based on a non-coherent energy detection considering with motivation of low rate wireless personal area network (LR-WPAN). TOA information is estimated via proper comparison with a prescribed threshold after the sliding correlation and search back window (SBW) process for reducing TOA error. To verify the performance of proposed ranging scheme, two distinct channel models approved by IEEE 802.15.4a TG are considered. According to the simulation results, we could conclude that the proposed scheme have performed better performance than the conventional method on the existence of multiple SOPs.
Keywords
UWB ranging; TOA estimation; IR-WPAN; SOP; Ternary code;
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  • Reference
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