NDLI: Design and analysis of a dynamic code division multiple access communication system based on tunable optical filter

Content Provider	IEEE Xplore Digital Library
Author	Hamarsheh, M.M.N. Shalaby, H.M.H. Abdullah, M.K.
Copyright Year	1983
Abstract	A dynamic optical code division multiple access (DOCDMA) communication system is proposed for high-bandwidth communication systems. An implementation of the system is proposed based on a fast tunable optical filter (TOF) in each encoder and decoder. This technique actively modulates the central wavelength of a TOF according to a functional code at the transmitter during the bit period before the transmission of the data. The system is modeled and analyzed taking into account multiple access interference (MAI), thermal noise, and phase-induced intensity noise (PIIN). The performance of this system is compared to that of a spectral amplitude coding system that uses either a Hadamard code or a modified quadratic congruence (MQC) code. The results show that the proposed DOCDMA system reduces the PIIN effect on the performance of the system and improves the bit error rate (BER) performance at a large number of users. Furthermore, it is found that when the effective power is large enough, the MAI becomes the main factor that limits system performance, whereas when the effective power is relatively low, both thermal noise and PIIN become the main limiting factors with thermal noise having the main influence.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	3959
Ending Page	3965
Page Count	7
File Size	231592
File Format	PDF
ISSN	07338724
Volume Number	23
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical design Multiaccess communication Optical filters Multiple access interference Optical transmitters Phase noise Bit error rate Thermal factors Optical modulation Decoding spectral amplitude coding optical code division multiple access (CDMA) optical fiber communication systems
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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