Laser pulse coded signal frequency measuring device based on DSP and CPLD

Hai-bo Zhang; Li-hua Cao; Ai-hui Geng; Yan Li; Ru-hai Guo; Ting-feng Wang

doi:10.1117/12.899165

19 August 2011 Laser pulse coded signal frequency measuring device based on DSP and CPLD

Hai-bo Zhang, Li-hua Cao, Ai-hui Geng, Yan Li, Ru-hai Guo, Ting-feng Wang

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81920R (2011) https://doi.org/10.1117/12.899165
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Laser pulse code is an anti-jamming measures used in semi-active laser guided weapons. On account of the laser-guided signals adopting pulse coding mode and the weak signal processing, it need complex calculations in the frequency measurement process according to the laser pulse code signal time correlation to meet the request in optoelectronic countermeasures in semi-active laser guided weapons. To ensure accurately completing frequency measurement in a short time, it needed to carry out self-related process with the pulse arrival time series composed of pulse arrival time, calculate the signal repetition period, and then identify the letter type to achieve signal decoding from determining the time value, number and rank number in a signal cycle by Using CPLD and DSP for signal processing chip, designing a laser-guided signal frequency measurement in the pulse frequency measurement device, improving the signal processing capability through the appropriate software algorithms. In this article, we introduced the principle of frequency measurement of the device, described the hardware components of the device, the system works and software, analyzed the impact of some system factors on the accuracy of the measurement. The experimental results indicated that this system improve the accuracy of the measurement under the premise of volume, real-time, anti-interference, low power of the laser pulse frequency measuring device. The practicality of the design, reliability has been demonstrated from the experimental point of view.

Citation Download Citation

Hai-bo Zhang, Li-hua Cao, Ai-hui Geng, Yan Li, Ru-hai Guo, and Ting-feng Wang "Laser pulse coded signal frequency measuring device based on DSP and CPLD", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81920R (19 August 2011); https://doi.org/10.1117/12.899165

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