期刊
出版社
IEEE
DOI: 10.1109/VTC2021-Spring51267.2021.9448678
关键词
OFDM; navigation; signals of opportunity; low Earth orbit satellites; blind Doppler tracking
资金
- Office of Naval Research (ONR) [N00014-19-1-2511, N00014-19-1-2613]
This paper presents an algorithm for blind Doppler frequency estimation from OFDM signals transmitted by low Earth orbit satellites, along with a method for resolving ambiguity in the Doppler estimate. Experimental results show accurate Doppler estimation on a mobile ground vehicle and unmanned aerial vehicle using the proposed approach.
An algorithm for blind Doppler frequency estimation from orthogonal frequency division multiplexing (OFDM) signals transmitted by low Earth orbit (LEO) satellites is developed. A method for resolving the ambiguity in the Doppler estimate is also discussed. Two sets of experimental results are presented. The first demonstrates blind Doppler estimation from terrestrial fifth-generation (5G) signals on a mobile ground vehicle, achieving 14.5 Hz Doppler root mean-squared error (RMSE). The second demonstrates an unmanned aerial vehicle navigating using the proposed approach with emulated 5G signals from two Orbcomm LEO satellites for a period of 2 minutes, achieving 15.16 m position RMSE.
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