空间光通信系统比特差错率的计算及影响因素分析  

Bit Error Rate Calculation and Analysis for Space Optical Communication System

作　　者：王朝晖[1] 

机构地区：[1]燕山大学信息科学与工程学院,秦皇岛066004

出　　处：《中国空间科学技术》2007年第3期68-71,共4页Chinese Space Science and Technology

摘　　要：文章以雪崩光电二极管(APD)作为光电探测器,针对两种常用的数据编码方式,在不同的传输带宽、背景光功率和探测器负载条件下,对空间光通信系统的比特差错率(BER)进行了计算,得到了BER和接收光功率之间的关系曲线。计算结果表明,传输带宽、背景光功率和探测器负载等参数均对BER有明显影响。传输带宽或背景光功率越大,BER越大;探测器负载电阻越小,BER越大。The bit error rate （BER） of the space optical communication system was calculated versus two kinds of general data modulation. In the course of the calculation, avalanche photodiode （APD） is used as the optical detector, and different values of the bandwidth, background power and the load resistance of the optical detector were taken into account. The curves of BER as a function of received optical power were acquired. Result shows that all the bandwidth, background power and the load resistance of the optical detector have a great deal of effect on the BER. The BER increases with the bandwidth and the background power, and decreases with the resistance of the optical detector.

关 键 词：星间链路 比特差错率 光探测器 空间光通信 

分 类 号：TN914.4[电子电信—通信与信息系统]