单周动态补偿的光通信码间抑制抗干扰新方法

在对光通信码间进行抑制抗干扰的过程中,光信号会受温度、大气流动等不确定性因素的影响,干扰随机性较大,导致传统的调相阵列技术由于不能实时检测,从而无法有效实现光通信码间的干扰抑制。提出一种单周动态补偿的光通信码间抑制抗干扰方法,分析带有干扰的光通信系统,给出外部扰动向量的动态特性,分析无限时域的性能指标,将原系统和干扰系统和期望输出联立,获取光通信增广系统。在调制信号中引入直流偏置信号,将经调制的数据向量划分成不同子序列,赋予各子序列对应的加权系数,依据光通信码间安全工作区域信号范围对光信号进行限幅,通过正信号的切顶信号求出补偿信号。对正信号与翻转负信号进行符号拼接、偏置信号添加等操作,将光信号以光功率的形式传输至光无线信道。将加性高斯白噪声信道作为信道模型,将负信号置零,进而抑制光通信码间的干扰。仿真实验结果表明,所提方法具有很好的抗干扰性能。

Dynamic compensation in a single week, a new method of optical communication between code inhibition of anti-interference

In optical communication between code for inhibition of anti-jamming in the process of optical signal will be affected by the uncertainty factors such as temperature, air flow, the influence of randomness, lead to the traditional phase modulation array technology, unable to real-time detection, unable to effectively implement optical communication intersymbol interference suppression, in this paper, a dynamic compensation of optical communication between code in a single week inhibition of anti-interference methods, analysis of optical communication system with disturbance and outside disturbance vector of the dynamic nature of infinite time domain analysis of performance indicators, the original system and interference and the desired output simultaneous, for optical communication augmented system. In the introduction of dc bias modulation signal, the modulation of the vector data into different subsequence, gives the corresponding subsequence of the weighting coefficient, based on the safety work area of optical communication between code signal light signal is clipped, cut the top of the signal signal and compensating signal. The positive signals and turn negative signal symbol matching, add operations such as bias signals, the transmission of optical signals in the form of light power to optical wireless channel. The additive white gaussian noise channel as the channel model, will be zero, negative signal and suppressing interference between the optical communication code. The simulation results show that the proposed method has good anti-interference performance.#$NLKeywords: optical communication;Inhibition;interference