Performance Analysis of Variable-Weight Multilength Optical Codes for Wavelength–Time O-CDMA Multimedia Systems

Author

Baby, Varghese ; Kwong, Wing C. ; Chang, Cheng-Yuan ; Yang, Guu-Chang ; Prucnal, PAul R.

Author_Institution

Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC

Volume

55

Issue

7

fYear

2007

fDate

7/1/2007 12:00:00 AM

Firstpage

1325

Lastpage

1333

Abstract

To support multimedia services with different discrete bit-rate requirements, families of multilength optical codes, such as the carrier-hopping prime code (CHPC), extended CHPC, and multiwavelength optical orthogonal code, were recently constructed for wavelength-time optical code-division multiple-access (O-CDMA). In this paper, the performances of these multilength optical codes in a multimedia O-CDMA system with a variable-weight operation are analyzed. Our study shows that short-length codes generate stronger interference than long-length codes. This supports services prioritization in O-CDMA. Our study also shows that code weight is a more important factor than code length in determining code performance.

Keywords

code division multiple access; codes; multimedia communication; optical communication; carrier-hopping prime code; multimedia services; multiwavelength optical orthogonal code; variable-weight multilength optical codes; wavelength-time O-CDMA multimedia systems; wavelength-time optical code-division multiple-access; Autocorrelation; Bit rate; Communications Society; Councils; Interference; Multiaccess communication; Multimedia systems; Pediatrics; Performance analysis; Quality of service; Multimedia services; multiple length; optical code division multiple access; variable weight; wavelength–time code;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2007.900615

Filename

4273684