New fiber-optic ATM switching networks using optical code-division multiple access for broadband communication applications

Author

Zhang, Jian-Guo ; Sharma, A.B. ; Kwong, Wing C.

Author_Institution

Sch. of Adv. Technol., Asian Inst. of Technol., Bangkok, Thailand

Volume

44

Issue

3

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

952

Lastpage

962

Abstract

We design new fiber-optic asynchronous-transfer-mode (ATM) networks which are based on incoherent optical code-division multiple access (CDMA). To eliminate the throughput bottleneck, optical signal processing is used in the proposed switching network to guarantee a high processing speed which is required by incoherent optical CDMA. This in turn can support real-time broadband communication services. Because strict optical orthogonal codes (OOCs) are employed, both cross-correlation and autocorrelation constraints are strictly limited to be “1” for variable-bitrate (VBR) and constant-bit-rate (CBR) data communications. In the VBR case, the use of strict OOCs can guarantee a lower bit error rate than using conventional OOCs. Moreover, the proposed ATM switching network can efficiently support CBR and VBR communications (e.g. HDTV and video conferencing with the MPEG-2 standard), with no increase of system bandwidth and no change of optical CDMA encoder/decoder. Simple theory and code construction of strict OOCs are presented. Moreover, error correction codes are used in fiber-optic CDMA networks to improve the system performance

Keywords

asynchronous transfer mode; broadband networks; code division multiple access; correlation methods; error correction codes; error statistics; optical fibre networks; CBR communications; CDMA; HDTV; MPEG-2 standard; OOC; VBR; asynchronous-transfer-mode; autocorrelation; bit error rate; broadband communication; constant-bit-rate data communications; cross-correlation; encoder/decoder; error correction code; fiber-optic ATM switching networks; high processing speed; optical code-division multiple access; optical orthogonal codes; optical signal processing; real-time broadband communication; switching network; system bandwidth; system performance; throughput bottleneck; variable-bitrate data communications; video conferencing; Asynchronous transfer mode; Autocorrelation; Broadband communication; Communication switching; Multiaccess communication; Optical design; Optical fiber communication; Optical fiber networks; Optical signal processing; Throughput;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.713219

Filename

713219