Accuracy of relative distance measurement with ultra wideband system

Yuichiro Shimizu, Yukitoshi Sanada

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)


    Due to recent research and relaxed regulations, ultra wideband (UWB) wireless systems have come into practical use. UWB uses a wide bandwidth of several gigahertz and ultra-short period pulses. Therefore, the position resolution is superior. If pulse locking exists between the transmitter and the receiver, the pulse locking point is shifted if the distance between the transmitter and the received is varied. This shift is corrected by DLL. By measuring this correction, relative position detection is possible. This paper studies the characteristics obtained when using a delay-lock loop (DLL) for pulse locking, which is important for relative position detection. In particular, it focuses on an environment in which local timing jitter exists. The template waveform on the receiving side and the existence or nonexistence of the loop filter and data modulation are also studied in order to improve the characteristics of the entire system.

    Original languageEnglish
    Pages (from-to)26-36
    Number of pages11
    JournalElectronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi)
    Issue number12
    Publication statusPublished - 2004 Dec 1


    • DLL
    • Distance measurement
    • Metrology
    • Relative position measurement
    • UWB

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering


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