Development of modified double-weight code and its implementation in multi-rate transmissions

• Published in: 2005 13th IEEE International Conference on Networks Jointly held with the 2005 IEEE 7th Malaysia International Conf on Communic Vol. 1; p. 5 pp.
• Main Authors: Aljunid, S.A., Samad, M.D.A., Othman, M., Hisham, M.H., Kasiman, A.H., Abdullah, M.K.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2005
• Subjects: Bit error rate; Bit rate; Double Weight (DW) code; Error correction; Error correction codes; Modified Double Weight (MDW) code; Multi-rate transmission; Multiaccess communication; Optical fiber testing; Optical fibers; SAC-OCDMA; Signal to noise ratio; Systems engineering and theory; Time division multiplexing
• ISBN: 1424400007; 9781424400003
• ISSN: 1531-2216; 2332-5798
• DOI: 10.1109/ICON.2005.1635487

This paper presents a new code structure and its ability in supporting multiple transmission rates in point to point spectral amplitude coding-optical code division multiple access (SAC-OCDMA) links. The double-weight (DW) code family that has a basic fixed weight of 2 was proposed. Modified double weight (MDW) code is a DW code family variation that has variable weight of greater than two. The ability of MDW codes to support simultaneous transmissions at different bit rates is shown through simulated results of the bit error rate (BER) and the eye patterns. Four MDW encoded channels were used at the bit rates of 2.5 Gbps and 10 Gbps. MDW code shown here significantly performs better than Hadamard and modified frequency hopping (MFH) codes.