Drones or UAVs are widely used today for commer- cial as well as strategic purposes. When a large numbers of drones fly and manueuver together, the OFDM based communication links between drones would see time-varying Doppler. In partic- ular, we study a measurement model where the Doppler variationis significant even within one OFDM block (symbol) duration. We approximately model the time variation of Doppler within one OFDM symbol as well as one whole frame and propose a low complexity timing correlation based algorithm. This approach exploits the repetition of the preamble symbol as well as theself similarity of the Cyclic Prefix(CP) to estimate the Doppler frequency, track the same throughout the frame. The proposed approach provides a far superior bit error rate performance in this time-varying Doppler models when compared to conventional schemes. © 2019 IEEE.