双极性的二维相干OCDMA码字构造与性能研究  

Code design and performance investigation of coherent 2-D OCDMA system with bipolarity

作　　者：陈志文[1] 庄松林[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《上海理工大学学报》2010年第4期359-361,共3页Journal of University of Shanghai For Science and Technology

基　　金：国家自然科学基金资助项目(60772027)

摘　　要：在单重合序列(OCS)的基础上,构造了二维相干OCDMA系统的双极性单重合序列(BOCS).在相同码长和波长数的情况下,大大增加了二维相干光码分多址(OCDMA)系统的码字容量,同时码字的自相关和互相关性能保持不变,而且串扰值略微降低,提高了二维OCDMA系统性能.此外,对于构造的BOCS,在相同码长的条件下,通过增加波长数,不仅可以进一步增加BOCS的码字容量,而且还可以进一步降低串扰值,从而进一步提高了二维OCDMA系统性能.Based on one-coincidence sequence（OCS） the bipolar one-coincidence sequence（BOCS） was constructed for the coherent 2-D optical code-division multiple access system（OCDMA）.Comparied with OCS,BOCS has much larger code cardinality,but lower crosstalk under the conditions of same code length,and same wavelengths and at the same time,holds the same performance of auto-correlation and cross-correlation,which can enhance the performance of 2-D OCDMA system.In addition,code cardinality can be increased and crosstalk reduced for BOCS with the increase of wavelengths,which can further enhance the performance of 2-D OCDMA system.

关 键 词：光码分多址 码字容量 串扰值 单重合序列 双极性单重合序列 

分 类 号：TN929.11[电子电信—通信与信息系统]