Title :
Design of multiweight unipolar codes for multimedia optical CDMA applications based on pairwise balanced designs
Author :
Djordjevic, Ivan B. ; Vasic, Bane ; Rorison, Judy
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Bristol, UK
Abstract :
A novel class of constant-length variable-weight optical orthogonal codes is proposed that can support multimedia services with different data rates and quality-of-service requirements. The construction is based on the pairwise balanced designs, or more specifically, on an incidence structure defined on an integer lattice. Proposed codes are suitable for spectral-amplitude coding, fast-frequency hopping, and time-spreading encoding in multimedia environment. A novel dual-balanced decoder is proposed capable of canceling multiuser interference in multimedia applications for spectral-amplitude-coding schemes employing the unipolar codes having nonfixed in-phase cross correlation.
Keywords :
code division multiple access; decoding; encoding; metropolitan area networks; multimedia communication; optical fibre LAN; optical fibre networks; constant-length variable-weight optical orthogonal codes; data rates; dual-balanced decoder; fast-frequency hopping; in-phase cross correlation; incidence structure; multimedia environment; multimedia optical CDMA applications; multimedia services; multiuser interference; multiweight unipolar codes; pairwise balanced designs; quality-of-service requirements; spectral-amplitude coding; spectral-amplitude-coding schemes; time-spreading encoding; Decoding; Encoding; Interference cancellation; Lattices; Multiaccess communication; Optical design; Optical transmitters; Privacy; Quality of service; Telecommunication traffic;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.816819
