Title :
Design of Two-Dimensional Wavelength-Time Codes for Fiber-Optic CDMA Systems
Author :
Tsai, Chia-Hao ; Liao, Tzu-Yi ; Chang, Cheng-Yuan ; Yang, Guu-Chang ; Kwong, Wing C.
Author_Institution :
Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan
Abstract :
In this paper, a new family of two-dimensional (2D) wavelength-time codes, which uses one-dimensional (1D) optical orthogonal codes (OOCs) with the maximum cross-correlation value of two as the time-spreading codes is proposed and analyzed. By relaxing the cross-correlation functions to at most two, the new 2D codes can provide larger code cardinality to accommodate more subscribers. They also have better performance than 1D optical codes because they can support heavier code weight, for a given code length. Moreover, our numerical examples show that the heavier code weight supported by our new 2D codes results in better performance than some of our previously proposed 2D codes, which have the maximum cross- correlation value of one.
Keywords :
code division multiple access; orthogonal codes; wavelength division multiplexing; fiber-optic CDMA system; maximum cross-correlation value; one-dimensional optical orthogonal code; time spreading code; two-dimensional wavelength-time code; Autocorrelation; Communications Society; Galois fields; Multiaccess communication; Optical fiber communication; Performance analysis; Synchronous generators;
Conference_Titel :
Communications, 2009. ICC '09. IEEE International Conference on
Conference_Location :
Dresden
Print_ISBN :
978-1-4244-3435-0
Electronic_ISBN :
1938-1883
DOI :
10.1109/ICC.2009.5198904
