自由空间激光通信中的数据传输分析  

Simulation Analysis of Data Transmission in Free Space Laser Communication

作　　者：林宏[1] 周传璘[1] 李卫中[1] 吴生林[1] 

机构地区：[1]湖北工程学院物理与电子信息工程学院,湖北孝感432000

出　　处：《激光杂志》2017年第8期156-159,共4页Laser Journal

基　　金：国家自然科学基金项目(41201362);湖北省自然科学基金项目(2014CFB572)

摘　　要：采用当前方法难以去除码间冗余干扰,激光通信信道存在拥塞问题,为此针对自由空间激光通信特点,提出基于经验模态分解的自由空间激光通信数据传输方法。首先建立自由空间激光通信信道特征分布模型,得到特征分解下激光通信数据传输迭代输出,组建自由空间激光通信信号接收模型,计算出激光通信信道冲击响应,利用自适应级联匹配滤波理论对激光通信数据进行抗干扰处理,提取通信数据功率谱密度特征,实现激光通信数据的经验模态分解和通信数据特征聚类。结果表明,该方法能够有效提升自由空间激光通信信道均衡性能,改善激光通信传输质量。It is difficult to remove inter-symbol redundant interference when data transmission is carried out by the current method. And there is congestion problem in the laser communication channel. In this paper,a free space laser communication data transmission method based on empirical mode decomposition is proposed for the characteristics of free space laser communication. Firstly,iterative output of laser communication data transmission under feature decomposition is obtained. And the free space laser communication signal receiving model is established to calculate the impact response of laser communication channel. The communication data is characterized by the feature data fusion processing. The adaptive data of the laser communication data is carried out by using the adaptive cascade matching filter theory,which realizes the empirical mode decomposition of laser data and the clustering of communication data features. The experimental results show that the proposed method can effectively improve the performance of free space laser communication channel and improve the quality of laser communication transmission.

关 键 词：自由空间 激光通信 数据传输 通信质量 

分 类 号：TN929.1[电子电信—通信与信息系统]