摘要
大气湍流所引起的光强闪烁会严重影响大气激光通信系统的性能,导致系统误码率(BER)增加。通过Rytov近似理论给出系统误码率和光强闪烁的理论模型,并进行MATLAB数值仿真。分析结果表明:在大气激光通信系统中,通过采取多孔径发射的方式,增加发射机孔径数目,选用长波长的激光,能够减小光强起伏对系统误码率的影响。而且,各发射机发出的光束之间的相干系数越小,越能改善系统性能,降低误码率。
Light-intensity oscillation caused by the atmosphere turbulence can influence the performance of the atmospheric laser communication system seriously,causing the increase of the bit error ratio （BER）.The relationship of system BER and light-intensity scintillation is given by the Rytov approximation theory.And the MATLAB simulation is carried out,the analysis result shows that the influence of the light-intensity oscillation on the system BER can be reduced by using multi -aperture transmitter, increasing the number of aperture, and selecting long-wavelength light. Besides, the smaller the correlation coefficient of multiple channels is,the smaller the BER is,which can greatly improve the communication performance of the system.
出处
《电子设计工程》
2010年第2期21-23,共3页
Electronic Design Engineering
关键词
大气激光通信
误码率(BER)
多孔径发射
大气湍流
光强起伏
atmospheric： laser communication
bit error ratio （BER）
multi-aperture transmitter
atmospheric turbulence
light-intensity oscillation
作者简介
黄俊森（1984-），男，贵州六盘水人，硕士研究生。研究方向：大气激光通信。
