OCDMA系统中一种新的多倍长光垂直码

提出了一种新的容量大、相关性好的多倍长、多波长二维光正交码（2D MW-OOC），基于多倍长一维光正交码（1DOOC）构造了MW-OOC。对同时使用具有2种码长的MW-OOC的光码分多址（OCD-MA）系统性能分析表明，使用该MW-OOC的系统性能良好，明显好于同样码长下的多倍长1-DOOC；使用短码序列的信号误码率性能好于使用长码序列信号的误码率性能。这些特征能充分发挥OCDMA系统大容量的技术优势，满足将来大容量多媒体OcDMA网络系统对同时传输的不同信号所需传输质量不同的需求。

A New Family of Multilength Multi-Wavelength Optical Orthogonal Code for CDMA System

A new kind of multilength,constant-weight two-dimensional multi-wavelength optical orthogonal code(2-D MWOOC) with large capacity and good correlation properties is constructed based on multilength one-dimensional(1-D) OOC.The performance of these new MWOOCs in an optical code division multiple access(OCDMA) network with double-services is analyzed.The result shows that the performance of the new 2-D MWOOC is much better than that of the 1-D OOC with the same code length,media with the shorter codeword performs much better than the media with longer codeword,and OCDMA system with these new multilength MWOOCs performs well.These features allow large capacity multimedia transmission in OCDMA network system.