由于采用传统编码方式的半主动寻的激光制导技术已经无法满足现代战争的需要,提出一种基于多子光束干涉的时空融合制导系统。将空间"水印密钥"编码信息与传统时序编码信息相结合, 生成一种新型时空融合编码信号。所用激光器被等功率的分为N个子光束, 从而根据子光束间良好的空间相干性生成具有一定规则的空域图样。计算结果表明, 空间干涉图样具有独特的明暗相间特性; 当发射系统的位置抖动精度小于0.1λ(λ为激光波长), 角度抖动精度小于0.1θ0(θ0为光束发散角)时, 发射系统的机械振动对制导系统的影响可忽略不计。该方法大幅度提升了半主动寻的制导系统的识别能力以及打击距离。

Advancements in laser decoy techniques have rendered laser semi-active guided weapons using traditional encoding methods unable to fulfill the needs of modern warfare. A fusion guidance system based on multiple sub-beam interference is proposed. The spatial “watermark cipher code” is combined with the temporal coded signal to produce a new temporal-spatial watermarking coded signal. The laser is divided into several equal power sub-beams which can produce an effective spatial watermarking interference pattern due to their coherence. Calculation results show that the interference pattern presents special distribution features of alternating brightness and darkness. The operating range and the identification of the guidance system are enhanced by the watermark encoding mode. When the position offset and angle deviation of the beam splitter, in the multiple sub-beams coherent emission system are less than 0.1λ(λ is the wavelength) and 0.1θ0(θ0 is the beam divergence), respectively, the effect of mechanical vibration on the emission system can be ignored.