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Optimum Threshold Detection over Folded Optical Coding Network - Pilot Wavelength on Optical CDMA Threshold Detection
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Over two-dimensional Folded Optical Orthogonal §Coding (FOOC) network, a simple threshold detection §scheme is illustrated to detect the number of §simultaneous network users and to adjust the §detection threshold value instantaneously. A special §wavelength called pilot wavelength is added into the §original transmission patterns of every network §user. At the receiver, we can acquire the number of §simultaneous network users from the power of the §pilot wavelength. Consequently, by adjusting the §detection power threshold to the optimum threshold §value, we can decrease the bit error rate (BER) and §improve the system performance for the discussed two-§dimensional optical code-division multiple-access §(2D-OCDMA) network. Compared with conventional §network system adopting prime codes or modified §prime codes, the proposed FOOC network with pilot §wavelength threshold detection shows an enhanced BER §performance and supports more simultaneous network §users.
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