Performance Analysis of Unipolar Code in Different Phase Modulations of Coherent Optical CDMA.
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| Title: | Performance Analysis of Unipolar Code in Different Phase Modulations of Coherent Optical CDMA. |
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| Authors: | Karbassian, M. Massoud1,2 mmk404@bham.ac.uk, Ghafouri-Shiraz, H.2 h.ghafouri-shiraz@bham.ac.uk |
| Source: | Engineering Letters. 2008, Vol. 16 Issue 1, p50-55. 6p. 1 Chart, 7 Graphs. |
| Subject Terms: | *CODE division multiple access, *OPTICAL interference, *PHASE modulation, *OPTICAL fibers, *SIGNAL-to-noise ratio |
| Abstract: | This paper examines the bit-error rate (BER) for an optical direct-detection code-division multiple-access (OCDMA) system employing a novel prime code family, hereby referred to as 'Double-Padded Modified Prime Code (DPMPC)' for the spreading and de-spreading operations in addition to coherent homodyne dual-balanced detection. As a coherent modulation, binary phase-shift keying (BPSK) format is deployed where the phase is modulated by either an external phase-modulator or injection-locking methods. The phase limitation and the performance for both phase-modulations including multiple access interferences (MAI) in a shot-noise limited regime are studied and moderate penalty associated with the limited phase excursion is revealed. [ABSTRACT FROM AUTHOR] |
| Database: | Academic Search Index |
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