光通信技术, 2019, 43 (11): 33, 网络出版: 2019-11-21
蓝绿激光通信空地下行链路性能分析
Performance analysis of blue-green laser communication air-ground downlink
无线光通信 大气信道 链路余量 误码率 蓝绿激光通信 wireless optical communication atmospheric channel link margin bit error rate blue-green laser communication
摘要
为了给蓝绿激光通信系统提供设计依据,采用中纬度地区标准大气衰减模型,结合大气衰减、几何衰减与大气湍流,分析了天气现象、湍流强度、发散角与接收孔径对链路余量、信噪比和误码率的影响。分析结果表明:在外界环境确定时,链路余量和发散角与接收孔径都有关,信噪比和误码率只与接收孔径有明显关系。同时,晴天、发散角越小和接收孔径越大,链路余量越大;湍流强度越弱,接收孔径越大,信噪比越大,误码率越小。
Abstract
In order to provide design basis for blue-green laser communication system, a standard atmospheric attenuation model in mid-latitude region was used to analyze the effects of weather phenomena, turbulence intensity, divergence angle and receiving aperture on link margin, signal-to-noise ratio and bit error rate, combined with atmospheric attenuation, geometric attenuation and atmospheric turbulence. The analysis results show that the link margin is related to divergence angle and receiving aperture, while the signal-to-noise ratio and bit error rate are only related to receiving aperture. At the same time, on sunny days, the smaller the divergence angle and the larger the receiving aperture, the larger the link margin is; the weaker the turbulence intensity, the larger the receiving aperture, the larger the SNR is and the smaller the bit error rate is.
李松朗, 毛忠阳, 刘传辉, 刘敏, 黄睿鑫. 蓝绿激光通信空地下行链路性能分析[J]. 光通信技术, 2019, 43(11): 33. LI Songlang, MAO Zhongyang, LIU Chuanhui, LIU Min, HUANG Ruixin. Performance analysis of blue-green laser communication air-ground downlink[J]. Optical Communication Technology, 2019, 43(11): 33.