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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 redundant intersymbol interference by using the current method, and the congestion problem exists in the laser communication channel. In view of the characteristics of free space laser communication, a free-space laser data transmission method based on empirical mode decomposition is proposed. Firstly, the free-space laser communication channel feature distribution model is established, the iterative output of laser communication data is obtained by eigendecomposition, the free-space laser communication signal reception model is established, the impulse response of laser communication channel is calculated, adaptive laser cascade matching filtering theory Data anti-interference processing, extraction of power spectral density characteristics of communication data to achieve the empirical mode of laser communication data decomposition and communication data feature clustering. The results show that this method can effectively improve the balance performance of free space laser communication channel and improve the quality of laser communication transmission.