采用改进素数码的异步跳频扩时光码分多址系统的理论分析  

The Analysis on Asynchronous Frequency Time Spreading OCDMA System with Modified Prime Code

作　　者：马文华[1] 左超[1] 林金桐[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2001年第1期1-5,共5页Journal of Beijing University of Posts and Telecommunications

摘　　要：通过对改进素数码的不同脉冲位置赋予不同的频率 ,提出了一种新的跳频扩时码 .理论分析表明 ,此跳频码的个数为 p3 ,且有很好的自相关和互相关特性 .数值结果也表明在使用双限幅器的前提下 ,这种跳频扩时码的异步光码分多址系统有良好的性能 .A novel frequency-time spreading code by designating the different frequencies to the different mark positions of the modified prime code is proposed. Theoretical analysis demonstrates that the number of the proposed codes can amount fo p3. Cross-correlation and the sidelobe of auto-correlation of the proposed code have relatively lower values. The numerical results show that the asynchronous OCDMA system assuming the proposed code reveal excellent performance in the presence of double hard limiters.

关 键 词：光码分多址 跳频码 素数码 异步跳频扩时 

分 类 号：TN914.4[电子电信—通信与信息系统] TN914.53[电子电信—信息与通信工程]