High repetition frequency jamming-resistant laser encoding system and laser encoding method

Abstract

The invention relates to a high repetition frequency jamming-resistant laser encoding method. Due to the threat of high repetition frequency laser active jamming to the laser semi-active homing guidance, aiming at a tunable laser generating nanosecond level pulse width, the invention provides the encoding of pulse width and pulse amplitude by directly clipping with an electro-optical switch; the phase difference generated by static double refraction is compensated by an orthorhombic KTP (potassium titanium oxide phosphate) crystal; the delay and the error can be reduced due to the synchronous control of a pockels cell power supply; the laser encoding, the pulse width encoding and the pulse amplitude modulation are combined with one another, so that the PAWM (puto amo window manager) encoding which not only can resist the laser angle deception jamming but also can resist the high repetition frequency jamming can be formed; and the method of high repetition frequency jamming resistance is improved on a guidance head, so that a novel laser encoding system can be formed, wherein the system is suitable for the aspects such as tracking, guidance, positioning, collimation, photo-communication APT (arbitrage pricing theory) technology, and photoelectronic warfare.

Description

technical field [0001] The invention relates to a coding method, especially a laser coding method. Widely used in tracking, guidance, positioning, collimation, optical communication, APT technology, photoelectric countermeasures, etc. Background technique [0002] In existing laser semi-active homing guidance (tracking) systems, coded laser pulses are used as guidance signals, which is an important means for laser semi-active homing guidance (tracking) to simultaneously track multiple targets and improve anti-jamming performance. [0003] Laser guidance (tracking) uses laser signals as the source of information. From the guidance mode, it can be divided into active, semi-active and passive, among which semi-active is more commonly used. The semi-active homing laser guidance (tracking) system is mainly composed of two parts: the laser seeker on the tracker and the laser target indicator outside the tracker. During the guidance process, the laser target designator is always...

AI Technical Summary

Problems solved by technology

[0013] This application aims at the problem that the existing coding method of the laser semi-active homing guided weapon system is easily interfered by the high repetition frequency of the laser, and designs a new type of laser anti-jamming coding system. Frequency jamming and decoy jamming; counting wave gates and electronic switches are used on the seeker to counter multi-source laser high repetition frequency jamming

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