摘要
利用光码分多址(OCDMA)接入技术,提出了一种新的多媒体数据传输方案,在不改变编解码器的基础上,在同一系统中即可以传输同速率的信号,也可以传输不同速率的信号。改变了以往多媒体数据传输时,为了保持地址码的正交性,采用变码长的改变编码器技术、且系统中所传输的速率必须保持整数倍关系。以同时传输2种不同速率信号为例,对系统的误码性能进行了理论分析和实验研究。结果表明,这是一种简单灵活、能适应多媒体数据传输的全光接入方案。
A novel system to transmit multimedia data with optical code-division multipleaccess（OCDMA） system is given. The new system can support multimedia data without changing encoder and decoder even though the user data rate is not the same by twice modulation,the first time to modulate clock,the second time to modulate data. We discuss the performance of BER of the system with two different data rates,the system performance is no worse than that of same-rate OCDMA system. Finally the relevant experiments have been done to verify the theory. The result shows that it is a simple and flexible system to support multimedia signal transmission.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2006年第10期1225-1228,共4页
Journal of Optoelectronics·Laser
基金
天津市自然科学基金资助项目(05YFJMJC09400)
