A frequency hopping communication frequency tracking control method and system for a drone

Abstract

The application relates to the technical field of unmanned aerial vehicle electromagnetic tracking control, and discloses an unmanned aerial vehicle frequency hopping communication frequency tracking control method and system, which comprises the following steps: acquiring a time-frequency observation sequence of unmanned aerial vehicle frequency hopping communication signals, determining an instantaneous frequency state and constructing a dynamic model describing state evolution; calculating the probability distribution information of the instantaneous frequency state under the current observation condition through recursive propagation, comparing the current transmission frequency with the state estimation value to obtain a frequency deviation amount, determining the response strength of frequency adjustment according to a credibility measure, generating a control instruction from the frequency deviation amount and the response strength; taking an ideal frequency trajectory formed by a control instruction sequence in a continuous control period as a reference, optimizing the frequency change smoothness and transmission energy consumption under tracking deviation constraints, obtaining a tracking frequency adjustment curve, eliminating the time delay accumulation between parameter estimation and tracking generation in a traditional serial architecture, improving the adaptability to frequency hopping randomness, and improving the tracking energy utilization efficiency.

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