摘要
首先构造一种扩展的立方线性同余码 (ECLC)并分析了其码字性能。在此基础上 ,用该码作为时间扩频伪随机序列和以素数码 (PC)作为跳波长伪随机序列 ,再构成一种新的二维光正交码ECLC/PC。然后分析了ECLC/PC码字的性能 ,并与EQC/PC作了比较。相比之下 ,两者的码长和码重都相等 ,前者的互相关性能略有下降 ,但码字容量大大增加。因此 ,ECLC/PC适合于接入用户数较多的OCDMA系统。
A new one-dimensional optical orthogonal codes(1D-OOC) named extended cubic line congruence codes(ECLC) is first constructed, and its performance is analyzed. Using ECLC for time spreading and prime codes(PC) for wavelength hopping, a new two-dimensional optical orthogonal codes(2D-OOC) named ECLC/PC is constructed. The performance of ECLC/PC is analyzed, and is also compared with EQC/PC. It is shown that both have same code length and same code weight. The cross-correlation performance of ECLC/PC is a little worse than EQC/PC, but ECLC/PC has much larger code cardinality.ECLC/PC is suitable for massive optical CDMA networks.
出处
《高技术通讯》
EI
CAS
CSCD
2003年第2期15-18,共4页
Chinese High Technology Letters
关键词
容量
光码分多址
二维光正交码
素数码
光纤通信
立方线性同余码
Optical Code Division Multiple Access (OCDMA),Two-dimensional optical orthogonal codes (2D-OOC),Prime codes
