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在分析大气衰减效应对无线光(FSO)通信性能影响时,获取及时准确的能见度数据是关键。首先,分析了目前获取能见度方法的不足之处,提出由激光雷达(LADAR)反演得到的数据可以更好地满足FSO通信性能分析的需求;其次,在介绍了利用LADAR观测数据反演水平能见度方法的基础上,以烟台1月18日典型天气为例,获取了全天的能见度数据,并结合80%的相对湿度阈值对雾霾的转化过程进行分析;最后,结合实测数据,通过设置适当的通信系统参数,对该日天气条件下的误码率(BER)进行了实时分析,并得出雾比霾更容易引起通信系统性能的降低。本文所得结论,将为建立实际的FSO通信链路提供指导。
Obtaining timely and accurate visibility data is crucial when analyzing the effects of atmospheric attenuation on wireless light (FSO) communication performance. First of all, the shortcomings of current visibility acquisition methods are analyzed, and the data obtained by LADAR inversion can better meet the requirements of FSO communication performance analysis. Secondly, the paper introduces the use of LADAR observations to invert the horizontal visibility Based on the typical weather in Yantai on January 18, the whole day visibility data were obtained and the haze conversion process was analyzed based on the relative humidity threshold of 80%. Finally, based on the measured data, Of the communication system parameters, the bit error rate (BER) of the day weather conditions were analyzed in real time, and come to fog and haze more likely to cause communication system performance degradation. The conclusions of this paper will provide guidance for establishing the actual FSO communication link.