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Long Xiao

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Proceedings Article | 18 December 2023 Paper

Design of signal processing system for airship-borne multi-spectral infrared camera

Hua Wang, QiangMin He, QingSheng Yu, XinChuan You, GuiMei Cheng, Long Xiao

Proceedings Volume 12960, 129600F (2023) https://doi.org/10.1117/12.3007586

KEYWORDS: Signal processing, Medium wave, Nonuniformity corrections, Field programmable gate arrays, Analog electronics, Infrared cameras

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According to the application requirements of airship-borne photoelectric payload, a low-noise miniaturized signal processing system for airship-borne multi-spectral infrared camera is designed and implemented. The system includes medium wave signal processing circuit, long wave signal processing circuit and integrated control circuit. High integrated design technology is adopted in medium wave signal processing circuit and long wave signal processing circuit to achieve high-precision bias voltage generation, low-noise analog signal conditioning, detector focal plane temperature monitoring, detector timing generation, image processing, data transmission. The size of each signal processing circuit is only 84mm×50mm×20mm. The integrated control circuit realizes the image data framing and encoding based on ARINC818 standard of the Avionics Digital Video Bus in FPGA, and sends the encoded high-speed digital video to the airship platform through optical fiber, which realizes the highly reliable and lightweight data transmission. After the introduction of the key technologies of each circuit, the experimental verification of the signal processing system for airship-borne multi-spectral infrared camera is carried out. The experimental results show that the design scheme of the signal processing system is reasonable and feasible. While realizing the miniaturization design, the system noise is lower than 0.3mV and the data transmission rate is up to 2.125Gbps, which meets the requirements of camera system.

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