在伽罗华有限域理论的基础上,用素域上的二次素数序列对素数码的码函数进行改进.结合MPC和EPC降低互相关值的方法,讨论异步OCDMA系统用户地址码的结构优化.分析MSPC的相关特性:最大互相关为2,最大自相关旁瓣为1,在此基础上,进一步构造出ESPC码字,该码字的自相关旁瓣和互相关的最大值均为1.较之由线性码函数确定的素数码,该码字的峰值旁瓣比大大增加.有利于提高系统传输性能,同时给信号探测提供便利.
参考文献
| [1] | Li Chuanqi, Sun Xiaohan, et al. Analysis of the net-structure and key-apparatus of fiber-optic networks [J].Chinese Journal of Quantum Electronics (量子电子学报), 2005, 22(3): 326-333 (in Chinese). |
| [2] | Sharr A A, Davis P A. Prime sequence: quasi-optimal sequences for channel code division multiplexing [J].Electron. Lett., 1983, 19(21): 888-890. |
| [3] | Kwong W C, Perrier P A, Prucnal P R. Performance comparisons of asynchronous and synchronous code-division multiple-access techniques for fiber-optic local area network [J]. IEEE Trans. Comm., 1991, 39(11): 1625-1634. |
| [4] | Zhang J G, Kwong W C, Yang G C. prime-sequence code and its optical CDMA coding architecture [J]. Electron.Lett., 1994, 30(6): 509-510. |
| [5] | Zhang J G. Effective design of optical code-division multiple access networks by using the modified prime code [J]. Electron. Lett., 1997, 33(3): 229-230. |
| [6] | Sato K, et al. Performance of optical direct-detection CDMA system using prime sequence code [C]∥ Conference Record ICC'95, 1995, 1312-1316. |
| [7] | Zhang J G, Kwong W C, Sharma A B. Effective design of optical fiber code-division multiple access networks using the modified prime codes and optical processing [C] ∥ ICCT 2000, 2000, 1: 392-397. |
| [8] | Maric S. New family of algebraically designed optical code for use in CDMA fibre-optic networks [J]. Electron.Lett., 1993, 29(6): 538-539. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%