为了有效、快速识别敌方制导激光的编码码型, 为我方的干扰准备提供更长时间, 通过对有限位伪随机码的原理和码型进行分析, 提出了一种针对有限位伪随机码的最小周期识别方法, 在求解最小整数比时, 通过更相减损法, 提高了运算效率。进行仿真验证, 结果表明, 该方法能有效的识别出有限位伪随机码的最小周期, 当接收脉冲信号个数为4时, 识别概率已经接近或者超过[95%], 且识别概率与移位寄存器的位数没有关系, 验证了该方法的有效性。

In order to effectively and quickly identify the coding pattern of the enemy′s guidance laser and provide a longer time for our interference preparations, the principle and pattern of the finite-bit pseudo-random code are analyzed and the minimum period identification method of the bit pseudo-random code is proposed. The more phase subtraction method is used to solve the minimum integer ratio, which improves the computational efficiency. The simulation verification results show that the method can effectively identify the minimum period of the finite-bit pseudo-random code. When the number of received pulse signals is 4, the recognition probability is close to or exceeds 95%, and it has nothing to do with the number of bits of the shift register. And the effectiveness of the method is verified.