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无线移动激光数字通信系统的设计 被引量:1
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作者 王小文 阎兵早 《激光杂志》 北大核心 2017年第8期168-171,共4页
针对当前单基频调制下无线移动通信系统适应性差、能耗高、数据通信效果不佳的不足,提出无线移动激光数字通信系统。系统硬件部分主要由激光通信发射、接收模块,编码器、解码器、增量调制器及扩频装置等模块构成;给出了无线移动激光数... 针对当前单基频调制下无线移动通信系统适应性差、能耗高、数据通信效果不佳的不足,提出无线移动激光数字通信系统。系统硬件部分主要由激光通信发射、接收模块,编码器、解码器、增量调制器及扩频装置等模块构成;给出了无线移动激光数字通信系统的软件算法流程,依据通信系统传输的数据量进行时隙分配,并降低系统能耗,在保证数据吞吐量的前提下,实现无线移动激光数字通信的高效、畅通。仿真实验证明,该系统能够均衡网络负载、降低系统能耗、提高通信质量。 展开更多
关键词 单基频 便携式 激光数字通信 系统设计
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Numerical analysis of thermal distortion of the mirror in space-to-groundlaser communicationlinks 被引量:1
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作者 LI Xiao-feng ZHANG Bai-lei LIN Mi QI Li-mei 《Optoelectronics Letters》 EI 2005年第3期209-212,共4页
The thermal distortion of an optical reflector surface due to the changing sunlight in a space environment will cause shift and spreading of its reflected focus and thereby influence the performance of space-to-ground... The thermal distortion of an optical reflector surface due to the changing sunlight in a space environment will cause shift and spreading of its reflected focus and thereby influence the performance of space-to-ground laser communication links. Based on the characteristics of a low orbit satellite, the normal shift of a plan mirror caused by thermal distortion is analyzed with the software of the ANSYS of finite element analysis. A general expression of the transmitted beam from a distorted reflector surface and a counting formula for the shifts of the focus center before and after thermal distortion are deduced. The result of simulation shews that the magnitude order of the normal shift of the antenna mirror surface can be as high as tens of urad. The worse the mirror thermal distortion is, the larger the shift of the received focus center is. And the change of the shifts does not obey a linear rule. 展开更多
关键词 激光通信 数字分析 热传递 光学反射 空间环境
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