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Micro-Doppler features can be regarded as a unique signature of an object with movements which provide additional information for classification, recognition and identification of the object. The common analysis method of Micro-Motion is time-frequency transform. However, the three-dimensional signatures of time-frequency distribution are not convenient to store and distinguish targets. The paper...
The satellite orbit parameters in the ephemeris and location of land receiver were studied. Universal mathematic models of Doppler frequency-shift were deduced using geometric vector. The Doppler frequency between satellites and land receivers and relations of Doppler frequency-shift and elevation angle are analyzed in low, middle and high orbits, and algorithm models were constructed. The simulation...
The paper studies a method in order to promote the accuracy of the control and simulation system of AUV (autonomous underwater vehicle) under the help of the error models of INS (inertia navigation system)/DVL (Doppler velocimeter log) integrated navigation system. Time series models are given in this paper, which describe the longitude error and latitude error of the INS/DVL integrated navigation...
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