Warning And Deception Jamming Technology Of Laser Countermeasure

The application of laser technology in modern battlefield has covered in every filedabout investigation positioning, communication, guidance, fire control and laser weapons.Therefore, in order to improve the survival ability and win the modern war, it is inevitable andnecessary to develop the special technology of laser countermeasure. According to thecountermeasure process of actual combat both sides, this article introduce laser guidance,laser warning and laser jamming starting from laser countermeasure respectively. The mainwork accomplished as follows:1. From the source of laser countermeasure began, the principle and characteristic oflaser guidance is introduced respectively. Furthermore, analyze the working principle of4-quadrant photoelectric detector that is used for the common laser guidance weapons incurrent. Moreover focus on guidance system of laser guidance weapons, and details analyzethe guidance principle, merits and demerits of semi-active homing guidance in the modernwar.2. Laser warning is the first task against the laser guidance weapon. This article analyzethe operating principle of existing alarm receiving equipment, and by analyzing laser inatmospheric transmission of the influencing factors, it theoretically proved the relationship oflaser alarm detection probability and signal to noise ratio (SNR). Propose a way based onHadamard Transform that improves the SNR of received signals about the laser alarmreceiving equipment. According to one of the parameters of the laser wavelength (includingincidence direction) acquisition, this paper adopted a kind of test method based on sinusoidalamplitude transmission grating diffraction principle.3. In order to ensure preferable interference rejection performance, the laser pulse code isa measure that semi-active homing guidance weapon has adopted. However, in order toachieve the purpose of interference in laser countermeasure must be the coding method oflaser was studied. This paper contra poses the most commonly used precise frequency codeand better prospects for the development of pseudo-random code of laser guided weaponscoding mode and interference method were studied respectively.4. A kind of more effective interference method is laser angle deception jamming in lasercountermeasure. This paper analyzes the principle of method and process in detail about theinterference method, and focusing on the false target selection and layout research ofinterference in the process, determine the natural condition in false target selection ofpreference and target protection regional issues. 5. In order to understand the practicality of the jamming system, it is necessary toevaluate the jamming performance. Four probabilities are calculated and discussed in theessay,which are the damage probability of laser guidance weapons without interference, theprobability of jamming signal succeeding in going into the wave door when conducting laserangle deception, the probability of succeeding in laser deception and the damage probabilityto targets when deception is achieved.