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Du Yuansong, Luo Wei, Dong Ruijie, et al. Generation and analysis of pseudo-random sequence laser guidance signal[J]. Opto-Electronic Engineering, 2019, 46(9): 180475. doi: 10.12086/oee.2019.180475
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Generation and analysis of pseudo-random sequence laser guidance signal
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Abstract
In view of the current state of the technology of the laser-guided weapon system that is vulnerable to fraudulent interference, a new idea using random sequence coding is proposed to improve its anti-jamming performance. By using the characteristics of better anti-interference performance of pseudo-random sequence, the laser active detection target system can not only achieve long-distance active target detection, but also effectively prevent external interference and improve the reliability of the system. The signal generation system is designed and implemented by combining Arduino IDE, Arduino UNO R3 microcontrollers, with oscilloscopes and YAG lasers, with good anti-interference performance. The system can be used for the study of new laser target indicators.-
Keywords:
- laser guidance /
- anti-jamming /
- pseudo-random sequence /
- target indication
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References
[1] 李云霞, 蒙文, 马丽华, 等.光电对抗原理与应用[M].西安:西安电子科技大学出版社, 2009: 10-11. Li Y X, Meng W, Ma L H, et al. Optoelectronic Countermeasure Principle and Application[M]. Xi'an: Xi'an University of Electronic Science and Technology Press, 2009: 10-11. [2] 李云霞, 徐荣甫, 刘敬海.激光驾束制导仪性能测试系统研究[J].红外与激光工程, 2001, 30(6): 474-477. doi: 10.3969/j.issn.1007-2276.2001.06.018 Li Y X, Xu R F, Liu J H. Research on performance testing solution of laser beam riding guider[J]. Infrared and Laser Engineering, 2001, 30(6): 474-477. doi: 10.3969/j.issn.1007-2276.2001.06.018 [3] 李云霞, 刘敬海, 赵尚弘, 等.激光驾束制导光场信息的模拟技术[J].光子学报, 2003, 32(4): 395-397. Li Y X, Liu J H, Zhao S H, et al. The information field simulation technique of laser beam riding guidance[J]. Acta Photonica Sinica, 2003, 32(4): 395-397. [4] Bayston T E, Weidler R C Jr, Thompson A B Jr, et al. Method and system for pulse interval modulation: 5026156[P]. 1991-06-25. [5] Bayston T E. Pulse code recognition method and system: 5023888[P]. 1991-06-11. [6] Naiman C S, Pompian S D. Multi-color, multi-pulse Laser: 6078606[P]. 2000-06-20. [7] Naiman C S, Pompian S D. Multi-color, multi-pulse laser: 6199794[P]. 2001-03-13. [8] 方艳艳, 柴金华.激光末制导炮弹武器系统新型激光编码方案[J].红外与激光工程, 2005, 34(5): 535-539. doi: 10.3969/j.issn.1007-2276.2005.05.007 Fang Y Y, Chai J H. New kind scheme of laser code in the laser terminal guidance ammunition round[J]. Infrared and Laser Engineering, 2005, 34(5): 535-539. doi: 10.3969/j.issn.1007-2276.2005.05.007 [9] 柴金华, 柳志波, 朱一旺.激光末端制导三波长激光编码方案[J].红外与激光工程, 2008, 37(S): 396-398. Chai J H, Liu Z B, Zhu Y W. Scheme of three-wavelength laser code in the laser terminal guidance[J]. Infrared and Laser Engineering, 2008, 37(S): 396-398. [10] 程玉宝, 孙中涛.多目标指示激光束的Walsh编码研究[J].电光与控制, 2008, 15(11): 88-91. doi: 10.3969/j.issn.1671-637X.2008.11.022 Cheng Y B, Sun Z T. Walsh coding of laser beam for multi-target pointing[J]. Electronics Optics & Control, 2008, 15(11): 88-91. doi: 10.3969/j.issn.1671-637X.2008.11.022 -
Overview
Overview: In view of the current state of the technology of the laser-guided weapon system that is vulnerable to fraudulent interference, a new idea using random sequence coding is proposed to improve its anti-jamming performance. The purpose is to design a laser target indicator that is simple in structure, small in computation, and capable of achieving strong anti-interference ability and relatively difficult to crack. Because the pseudo-random sequence has strong anti-interference, difficult to crack and easy to implement, this paper applies the anti-interference characteristics of pseudo-random sequence to laser guided weapons. The laser active detection target system can not only achieve long-distance active target detection, but also effectively prevent external interference and improve the reliability of the system. The guidance signal is designed by using Matlab computing software. The signal is coded by changing the interval between pulse and pulse. Experimental platform is developed by Matlab software the Arduino IDE software, analogue oscilloscope and Arduino UNO R3 microcontroller, and GDS-2000 digital oscilloscope, etc, to produce simulated experiment platform to generate laser control signal. The simulated experiment verifies the generation of the pseudo-random sequence indication signal. Three kinds of target indication signals are designed. In order to generate a laser-guided signal of random-pseudo sequence in pulse widths and intervals, the control signal above-mentioned is applied to a FIRDP-1064 YAG laser which is measured by a WKWR-1 waveform detector. Under the laboratory conditions, a laser-guided signal that can be used for laser-guided weapons can be obtained. The experiment simulates the process of receiving diffuse reflection echo by laser guided weapon seeker, the laser guidance signal is pointed to the wall, and the detector receives diffuse reflection laser signal from the wall. After decoding, analysis and signal processing, it is determined that the received diffuse reflection laser echo is the indicator signal. By comparing the characteristics of the three types of target indication signals, it can be seen that the third type of target indication signal is a random signal similar to a pseudo-random sequence, which has the characteristics and complexity of pseudo-random sequence coding, and also reduces the speed of change and the difficulty of decoding. Combined with software and hardware, the signal generation system is designed and implemented by combining Arduino IDE, Arduino UNO R3 microcontrollers, with oscilloscopes and YAG lasers, with good anti-interference performance. The results show that the system is stable, and all parameters meet the design requirements. For laser guidance research, this study can provide a design solution for target indicators of laser-guided weapons to counter interference. The system can be used for the study of new laser target indicators.
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Du Yuansong, Luo Wei, Dong Ruijie, et al. Generation and analysis of pseudo-random sequence laser guidance signal[J]. Opto-Electronic Engineering, 2019, 46(9): 180475. doi: 10.12086/oee.2019.180475
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Figure 1.
Laser control signal generation simulation equipment connection.
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Figure 2.
Random sequence simulation experiment pulse
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Figure 3.
Random sequence control signal oscilloscope waveform
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Figure 4.
Control the overall effect of the signal
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Figure 5.
Oscilloscope screen display
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Figure 6.
Control the overall effect of the signal
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Figure 7.
Oscilloscope screen display
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Figure 8.
Control signal part effect diagram.
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Figure 9.
Oscilloscope screen display.
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Figure 10.
Experimental setup diagram.
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Figure 11.
Overall renderings of the guidance signal
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Figure 12.
Single pulse signal waveform
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Figure 13.
Overall renderings of the guidance signal
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Figure 14.
Oscilloscope screen display
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Figure 15.
Part renderings of the guidance signal.
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Figure 16.
Oscilloscope screen display.
