Title :
Multiple-length extended carrier-hopping prime codes for optical CDMA systems supporting multirate multimedia services
Author :
Kwong, Wing C. ; Yang, Guu-Chang
Author_Institution :
Dept. of Eng., Hofstra Univ., Hempstead, NY, USA
Abstract :
Extended carrier-hopping prime codes (ECHPCs) with ideal correlation properties (i.e., zero autocorrelation sidelobes and cross-correlation values of at most 1) and significantly expanded cardinality were recently constructed for wavelength-hopping time-spreading optical code division multiple access (O-CDMA). To support multimedia services with different bit-rate requirements, a new family of multiple-length constant-weight ECHPCs with ideal correlation properties is constructed algebraically in this paper. The performance of these new codes in an O-CDMA multimedia system is analyzed. Contrary to conventional single-length codes, our study shows that the performance of these multiple-length codes improves as the code length decreases, thus supporting prioritization in O-CDMA.
Keywords :
code division multiple access; codes; error statistics; multimedia communication; ECHPC; bit rate; cross-correlation values; extended carrier-hopping prime codes; multiple-length codes; multirate multimedia; optical CDMA; optical code division multiple access; single-length codes; wavelength hopping; zero autocorrelation sidelobes; Arrayed waveguide gratings; Autocorrelation; Bit rate; Bragg gratings; Fiber gratings; Multiaccess communication; Multimedia systems; Optical waveguides; Performance analysis; Transmission line matrix methods; Multimedia services; optical code division multiple access (O-CDMA); wavelength–time code;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.857731
