中文

Journal of Applied Sciences ›› 2006, Vol. 24 ›› Issue (2): 131-134.

• Articles • Previous Articles     Next Articles

Laser Frequency Repetition Times in Portable Aerial Target Measurement

MA Jian-wei1,2, LI Peng1, SHENG An-dong1, GUO Zhi1   

  1. 1. Department of Automation, Nanjing University of Science & Technology, Nanjing 210094, China;
    2. College of Electronic Information Engineering, Henan University of Science & Technology, Luoyang 471003, China
  • Received:2004-10-30 Revised:2004-12-21 Online:2006-03-31 Published:2006-03-31

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Abstract: The problem of laser frequency repetition (LFR) times in target distance measurement is studied.In analyzing flight path data, power spectral density is computed to obtain the frequency range and times of LFR using the Shannon theorem.Under the assumption of line movement with constant velocity, the flight path is built such that prediction error variance computed by the LFR times meets the specified requirements.Relation between error variance and the maximum allowed number of missing measurements is presented.It is proved both in theory and from practice that the LFR times can meet the performance specifications of laser echo rate while guaranteeing the tracking precision.

Key words: laser frequency repetition (LFR), power spectral density (PSD), laser echo rate, sampling frequency

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