星间二维光CDMA系统方案及性能分析

为了充分利用星间光通信的丰富带宽，提出并设计了星间二维光CDMA系统方案。考虑背景光、多用户干扰、APD接收机噪声及热噪声，给出了星间二维光CDMA通信系统的系统模型。采用数值分析的方法，分析了该通信系统的误码率性能。结果表明：星间二维光CDMA通信系统易受多用户干扰、码速率以及背景光等因素的影响；通过合理的设计各种参数，在星间二维光CDMA通信系统中可以获得多用户、高数据速率的通信性能。

System Design and Performance Analysis of Intersatellite Two-Dimensional Optical CDMA System

In order to make fully use of the wide bandwidth of space optical communication,we presented a novel system of intersatellite two-dimensional optical CDMA communication and its design scheme.Considering the effects of APD noise,thermal noise,multi-user interference,and background light noise,we analyzed the bit error rate (BER) versus active users and received optical power of the proposed system.The results show that this optical CDMA communication system is influenced by bit rate,multi-user interference,and background light noise.And we can get good performance in this intersatellite optical CDMA communication by fully considering all these affecting factors and designing reasonable parameters of this communication system.