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Nonlinearity-based single-channel monopulse tracking method for OFDM-aided UAV A2G communications

Nonlinearity-based single-channel monopulse tracking method for OFDM-aided UAV A2G communications
Nonlinearity-based single-channel monopulse tracking method for OFDM-aided UAV A2G communications
Unmanned aerial vehicles (UAVs) have attracted great interest in rapid deployment for both civilian and military applications. The conventional UAV monopulse tracking technique requires dedicated pulses which suffer from multipath effect in air-to-ground (A2G) link with low elevation angles, whereas the orthogonal frequency division multiplexing (OFDM) for A2G high rate communication under frequency selective fading channel was not yet investigated for UAV target tracking at ground station. In this paper, we propose a single-channel monopulse tracking (SCMT) angle estimation method in OFDM tracking receiver exploiting square- and absolute-value nonlinear detection of amplitude-modulated difference signals. Extensive simulations are conducted to validate the proposed estimation method in terms of estimation range and estimation root mean squared error (RMSE). Results show that, the proposed angle estimation method exhibits S-shaped curve characteristic under different angle errors, which is insensitive to channels and modulations. The proposed method obtains angle estimation RMSEs smaller than 0.18◦ for antenna element distance d = 0.5 m with 10 MHz OFDM signals. For both square- and absolute-value methods, a maximum degradation of 0.02◦ for angle estimation RMSEs is observed under Rician channels compared with the estimation under additive white Gaussian noise (AWGN) channels, whereas the absolutevalue estimation outperforms the square-value estimation.
2169-3536
148485-148494
Pan, Xi
84bbba39-a143-4dfe-b40c-a6b649ce05a2
Yan, Chaoxing
c7bc0d86-7445-4705-a830-2041c52d9b79
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a
Pan, Xi
84bbba39-a143-4dfe-b40c-a6b649ce05a2
Yan, Chaoxing
c7bc0d86-7445-4705-a830-2041c52d9b79
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a

Pan, Xi, Yan, Chaoxing and Zhang, Jiankang (2019) Nonlinearity-based single-channel monopulse tracking method for OFDM-aided UAV A2G communications. IEEE Access, 7, 148485-148494. (doi:10.1109/ACCESS.2019.2946960).

Record type: Article

Abstract

Unmanned aerial vehicles (UAVs) have attracted great interest in rapid deployment for both civilian and military applications. The conventional UAV monopulse tracking technique requires dedicated pulses which suffer from multipath effect in air-to-ground (A2G) link with low elevation angles, whereas the orthogonal frequency division multiplexing (OFDM) for A2G high rate communication under frequency selective fading channel was not yet investigated for UAV target tracking at ground station. In this paper, we propose a single-channel monopulse tracking (SCMT) angle estimation method in OFDM tracking receiver exploiting square- and absolute-value nonlinear detection of amplitude-modulated difference signals. Extensive simulations are conducted to validate the proposed estimation method in terms of estimation range and estimation root mean squared error (RMSE). Results show that, the proposed angle estimation method exhibits S-shaped curve characteristic under different angle errors, which is insensitive to channels and modulations. The proposed method obtains angle estimation RMSEs smaller than 0.18◦ for antenna element distance d = 0.5 m with 10 MHz OFDM signals. For both square- and absolute-value methods, a maximum degradation of 0.02◦ for angle estimation RMSEs is observed under Rician channels compared with the estimation under additive white Gaussian noise (AWGN) channels, whereas the absolutevalue estimation outperforms the square-value estimation.

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Accepted/In Press date: 8 October 2019
e-pub ahead of print date: 11 October 2019

Identifiers

Local EPrints ID: 434973
URI: http://eprints.soton.ac.uk/id/eprint/434973
ISSN: 2169-3536
PURE UUID: 8b248fbe-d8a2-4408-9759-83be0b1a7a99
ORCID for Jiankang Zhang: ORCID iD orcid.org/0000-0001-5316-1711

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Date deposited: 17 Oct 2019 16:30
Last modified: 17 Mar 2024 03:19

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Contributors

Author: Xi Pan
Author: Chaoxing Yan
Author: Jiankang Zhang ORCID iD

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