Abstract
A newly constructed code family named two-dimensional diluted perfect
difference codes (2-D DPD codes) and a corresponding architecture for the
optical code division multiple access (OCDMA) system are proposed in this
paper. The 2-D DPD codes are derived based on the perfect difference set and
the dilution method for the spectral and spatial coding application. The 2-D
DPD codes have the multiuser interference (MUI) cancellation and the phase-induced
intensity noise (PIIN) suppression properties. In comparison with the other
2-D codes, such as the modified quadratic congruence codes (MQC codes), the
maximal-area matrices codes (M-matrices codes), or the 2-D perfect difference
codes (2-D PD codes), the analytical calculation and the simulation results
show that the systems with the 2-D DPD codes have better performance. The
proposed system can accommodate much more total number of simultaneous users
at the same bit error rate.
© 2009 IEEE
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