Title :
Noncoherent spatial/spectral optical CDMA system with two-dimensional perfect difference codes
Author :
Lin, Cheing-Hong ; Wu, Jingshown ; Yang, Chun-Liang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
In this paper, the family of newly constructed codes, named 2-D perfect difference codes, is proposed to suppress the phase-induced intensity noise (PIIN) in noncoherent spatial/spectral optical code division multiple access (OCDMA) systems. A novel spatial/spectral transceiver structure employing the new codes to eliminate the multiuser interference (MUI) by using the MUI cancellation property of the new codes is also presented. Compared with the systems employing modified quadratic congruence codes (MQC codes) and maximal-area matrices codes (M-matrices codes), numerical results verify that our proposed system can more effectively suppress the PIIN and eliminate MUI. Hence, the number of simultaneous users and total transmission rate increase significantly.
Keywords :
code division multiple access; codes; interference suppression; matrix algebra; optical fibre communication; phase noise; transceivers; maximal-area matrices codes; modified quadratic congruence codes; multiuser interference; noncoherent optical CDMA system; optical code division multiple access; phase-induced intensity noise; spatial optical CDMA system; spatial transceiver; spectral optical CDMA system; spectral transceiver; two-dimensional perfect difference codes; Error correction; Error correction codes; Frequency; Multiaccess communication; Multiple access interference; Optical noise; Phase noise; System performance; Transceivers; Two dimensional displays; Maximal-area matrices codes; OCDMA; modified quadratic congruence codes; multiuser interference; perfect difference codes; phase-induced intensity noise;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.859407
