Progress Toward Airborne GPS Spatial Filtering Powered by Recent Advances in FPGA Technology

Kunzler, Jakob W.; Ammermon, Spencer M.; Warnick, Karl F.

doi:10.1109/ietc47856.2020.9249115

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…Finally, real implementation is subject to reliable and high-powered hardware. Recent research, such as that of [80] or [81], suggests that the best alternatives today are systems based on field-programmable gate arrays (FPGAs), which adapt to the demanding requirements of the aerospace sector without losing flexibility and computing power.…”

Section: Discussionmentioning

confidence: 99%

Comparative Study of Optimal Multivariable LQR and MPC Controllers for Unmanned Combat Air Systems in Trajectory Tracking

2021

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Guidance, navigation, and control system design is, undoubtedly, one of the most relevant issues in any type of unmanned aerial vehicle, especially in the case of military missions. This task needs to be performed in the most efficient way possible, which involves trying to satisfy a set of requirements that are sometimes in opposition. The purpose of this article was to compare two different control strategies in conjunction with a path-planning and guidance system with the objective of completing military missions in the most satisfactory way. For this purpose, a novel dynamic trajectory-planning algorithm is employed, which can obtain an appropriate trajectory by analyzing the environment as a discrete 3D adaptive mesh and performs a softening process a posteriori. Moreover, two multivariable control techniques are proposed, i.e., the linear quadratic regulator and the model predictive control, which were designed to offer optimal responses in terms of stability and robustness.

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Section: Discussionmentioning

confidence: 99%

Comparative Study of Optimal Multivariable LQR and MPC Controllers for Unmanned Combat Air Systems in Trajectory Tracking

2021

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Bench Testing a System on Chip Adaptive Beamformer For GPS

Kunzler

Warnick

Bartschi

et al. 2022

2022 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)

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Software-Defined Platform for Global Navigation Satellite System Antenna Array Development and Testing

Gomes,

Baptista,

Dinis

et al. 2024

Applied Sciences

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With the increasing demand for accurate and robust positioning solutions, the use of GNSS antenna arrays has gained significant attention. However, their development and testing are frequently constrained by the inflexibility of traditional hardware platforms, often requiring extensive reconfiguration throughout the development cycle. This paper presents a platform based on a system on chip to develop a highly flexible software-controlled system that is capable of directly sampling up to 16 antenna elements. Multibeam digital beamforming is implemented using the available FPGA resources and the resulting signal is reproduced by the integrated DAC and can be connected to any conventional single antenna GNSS receiver. This paper presents the architecture of the platform, detailing its components and capabilities. Our experimental results demonstrate that the system can phase shift every channel with errors of less than 0.5° and can reconfigure 4 simultaneous beams of a 16-antenna array at speeds of 1.2 kHz, and 20 beams at around 400 Hz. The average delay introduced by each channel of the system is around 381 ns with a maximum deviation of 1.05 ns. The delay was also measured for the implementation using 4 beams, which achieves a slightly bigger average delay of 384.6 ns while keeping the variation to 5 to 6 ns. This system is intended to be used as the backbone for the development of antenna arrays and beamforming algorithms. Given its flexibility, it is not necessary to develop new hardware between development iterations or even for different systems, as only the software layer needs to be modified. Consequently, it is possible to expedite the development stage before producing dedicated solutions for industrial applications.

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Progress Toward Airborne GPS Spatial Filtering Powered by Recent Advances in FPGA Technology

Cited by 3 publications

References 4 publications

Comparative Study of Optimal Multivariable LQR and MPC Controllers for Unmanned Combat Air Systems in Trajectory Tracking

Comparative Study of Optimal Multivariable LQR and MPC Controllers for Unmanned Combat Air Systems in Trajectory Tracking

Bench Testing a System on Chip Adaptive Beamformer For GPS

Software-Defined Platform for Global Navigation Satellite System Antenna Array Development and Testing

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