Authors V.T. Lobach, M.V. Potipak
Month, Year 11, 2014 @en
Index UDC 621.396.969.11
Abstract In this paper the method of slowly moving targets range determination by high resolution range radar is observed. This kind of task arose at precision measurements of flight vehicle altitude, for example, when aerial vehicles is in a low-level terrain following mode of flight. High range resolution is especially actual at over hilly terrain flights. Existing methods for obtaining high range resolution have several drawbacks limiting their use. For example, continuous radiation mode requires high transmitting and receiving antennas decoupling. The usage of pulsed signals with wide bandwidth, needs high transmitter pulsed power. A model of quasi-continuous signal with a stepped carrier frequency change is investigated. Such kind of signal model allows the receiving and transmitting antennas decoupling, while maintaining high spatial range resolution. Estimation target range is performed based on reflected signal phase-frequency characteristics analysis. It is shown the ability of target range measurement under high level of noise.

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Keywords Radar; high range resolution; step frequency radar.
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