Research on multi-rate quasi-synchronous coherent time-spreading OCDMA system

Author

Zhengfeng Xiao ; Jianhua Ji ; Ming Xu ; Shuwen Yang

Author_Institution

Adv. Technol. Res. Center, Shenzhen Univ., Shenzhen, China

fYear

2010

fDate

24-27 Oct. 2010

Firstpage

139

Lastpage

142

Abstract

We propose a novel scheme of multi-rate quasi-synchronous coherent time-spreading OCDMA system, employing orthogonal variable spreading factor (OVSF) codes with a zero-correlation zone. Within permissible time delay, multiple-access interference and beat noise can be removed in multi-rate quasi-synchronous coherent time-spreading OCDMA system, and the near-far problem can also be eliminated. Simulation of eight simultaneous users with 1.25 Gbit/s and 0.625 Gbit/s is demonstrated, where the fiber link consists of 20 km single-mode fiber, plus 2 km Dispersion Compensating Fiber.

Keywords

code division multiple access; interference suppression; light interference; optical fibre networks; orthogonal codes; OVSF codes; beat noise removal; bit rate 0.625 Gbit/s; bit rate 1.25 Gbit/s; coherent time-spreading OCDMA system; dispersion compensating fiber; fiber link; multiple-access interference; multirate quasisynchronous OCDMA system; near-far problem; orthogonal variable spreading factor codes; single-mode fiber; size 2 km; size 20 km; zero-correlation zone; OCDMA; OVSF; aperiodic cross-correlation; optical communication;

fLanguage

English

Publisher

iet

Conference_Titel

Optical Communications and Networks (ICOCN 2010), 9th International Conference on

Conference_Location

Nanjing

Type

conf

DOI

10.1049/cp.2010.1172

Filename

5778434