激光网络目标加密信号同步传输方法研究

Study on synchronous transmission method of target encrypted signal in laser network

针对激光网络目标加密信号同步传输效率较低、运算量过大的问题,提出了一种激光网络目标加密信号同步传输方法。结合同步过程会受相位及波频幅值因素影响,建立双阶同步模型,提取两个相同相位的线性调频信号,排列组合形成一组同步频域,计算一致性较强的同步权重因子。构建信号发送和接收模型,提取信号的带宽、频域及时延量等影响传输效率的参数,得到该参数调频处理的最优解。通过正常信号及混沌信号同步传输的周期特点,计算同步信号发送端到接收端之间误差时间变量,分析得出传输误差随周期变化的关系,完成加密信号的同步传输。实验结果表明,所提方法同步性能较好,具有极强的抗噪性,且结构简单运算量较低、传输效率较高。

Aiming at the problems of low efficiency and large amount of calculation of synchronous transmission of target encrypted signal in laser network,a synchronous transmission method of target encrypted signal in laser network is proposed.Considering that the synchronization process will be affected by the factors of phase and wave frequency amplitude,a two-order synchronization model is established,two LFM signals with the same phase are extracted,arranged and combined to form a group of synchronization frequency domain,and the synchronization weight factors with strong consistency are calculated.The signal transmission and reception model is constructed,and the parameters affecting the transmission efficiency such as signal bandwidth and frequency domain time delay are extracted to obtain the optimal solution of frequency modulation processing.According to the periodic characteristics of synchronous transmission of normal signal and chaotic signal,the error time variable from the transmitting end to the receiving end of synchronous signal is calculated,the relationship between transmission error and period is analyzed,and the synchronous transmission of encrypted signal is completed.Experimental results show that the proposed method has good synchronization performance,strong anti noise,simple structure,low computation and high transmission efficiency.