Comparisons between different concatenated codes impact on performance of optical CDMA

Author

Chongfu Zhang ; Kun Qiu

Author_Institution

Univ. of Electron. Sci. & Technol. of China, Chengdu

fYear

2007

fDate

11-13 July 2007

Firstpage

525

Lastpage

529

Abstract

In this paper, a method using alterable concatenated code to pre-encode is presented to reduce the impact of system impairment and multiple access interference (MAI) in optical code division multiple access (OCDMA) system, and comprehensive comparisons between different concatenated code type and forward error correcting (FEC) scheme are studied by simulation. In the scheme, we apply concatenated coding to the embedded modulation scheme, and optical orthogonal code (OOC) is employed as address sequence code, an avalanche photodiode (APD) is selected as the system receiver. From numerical results, we can show that the proposed system has good performance at a BER of 10^-9 with a gain of 6.4 dB improvement achieved using the concatenated code as the pre-code.

Keywords

code division multiple access; concatenated codes; forward error correction; interference; optical fibre networks; optical modulation; orthogonal codes; address sequence code; avalanche photodiode; concatenated coding; embedded modulation scheme; forward error correcting scheme; gain 6.4 dB; multiple access interference; optical code division multiple access; optical orthogonal code; system receiver; Adaptive optics; Passive optical networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems, 2007. ICCCAS 2007. International Conference on

Conference_Location

Kokura

Print_ISBN

978-1-4244-1473-4

Type

conf

DOI

10.1109/ICCCAS.2007.6251630

Filename

6251630