激光告警是激光对抗的重要前提和基本手段，如何在复杂背景噪声下识别来袭激光信号，进而准确报警是激光告警面临的首要问题。该文分析了激光告警设备检测概率与信噪比的关系，从关系式可以看出，为了提高激光告警设备的检测概率，需要增加激光信号的信噪比。提出了一种最大信噪比的自适应算法，进行了算法分析，并利用矩阵变换作出了算法简化，从而保证了系统信噪比的最佳化。最后对最佳权向量的求解这个问题，给出了适用于工程化的最佳权向量求解的简单迭代算法。

The laser warning is the important precondition and basic measure in laser countermeasure. The first technical problem for the laser warning is how to recognize a targeting laser signal from complex background noise and accurately raise the alarm. The relationship between detection probability of laser warning equipment and signal-to-noise ratio is analyzed. It can be seen form the relational expression that,the increase of the signal-to-noise ratio of laser signal is a precondition for improving the detection probability. In order to ensure the optimization of the system signal-to-noise ratio,an adaptive method was proposed to ensure maximum signal-to-noise ratio. The algorithm analysis was carried out and the algorithm simplification was made with the matrix transformation. Finally,a simple iterative algorithm suitable for the optimum weight vector solution is given.