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A new family of two-dimensional optical orthogonal code with zero cross-correlation zone (2-D ZCZ) is constructed, using primary LA sequence for time spreading and OCS (one-coincidence sequence) for wavelength hopping. Performances of autocorrelation and cross-correlation of 2-D ZCZ are analyzed. BER performance of two-dimensional OCDMA system is also analyzed.
We propose a novel quasi-synchronous coherent time-spreading optical CDMA, where the synchronization among users can be controlled within permissible time delay. Relationship between the system performance and code parameters is analyzed. Within permissible time delay, the mean intensity of aperiodic cross-correlation equals zero, and the beat noise can be removed.
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