摘要
为了研究星间光CDMA(codedivisionmultipleaccess)通信系统的性能,分析了跟瞄误差对系统误码率性能的影响。考虑多用户干扰、跟瞄误差和接收机噪声,给出了该通信系统的系统模型,并数值分析了跟瞄误差为不同值时误码率随接收光功率的变化关系。结果表明,跟瞄误差较小时可以实现高码速率通信,当跟瞄误差较大时,该通信系统难以实现通信,需要采用信道编码和新的接收技术来提高通信系统的性能。
In order to study the performance of inter-satellite optical CDMA communication system, the influence of tracking and pointing error on the BER of this communication system was analyzed. With considering the effects of multi-user interference, tracking, pointing error, and APD noise, the system model of inter-satellite optical CDMA communication system was presented. The relationship between BER and receiving optical power was analyzed in detail. The results show that the inter-satellite optical CDMA communication system can realize high-speed communication when the normal variance σ of tracking and pointing error is small. When σ is large, a new detection scheme and channel coding should be used to improve communication performance.
出处
《通信学报》
EI
CSCD
北大核心
2006年第7期35-38,共4页
Journal on Communications
基金
国家自然科学基金资助项目(6027206)~~
关键词
卫星光通信
光CDMA
跟瞄误差
二维地址码
inter-satellite optical communication
optical CDMA
tracking and pointing error
two-dimensional address codes