Abstract
In this thesis, we propose a systematic method to generate a set of unitary matrices that is corresponding to a generator of the CPPM signals. A unitary matrix composed of the eigenvectors of a circulant matrix is considered as the seed matrix. A set of unitary matrices can be obtained by applying column rightward and row downward shifting to the seed matrix. The performance of the legitimate receiver and the eavesdropper is compared when the length of signal is 4. Besides, the optical circuit of the proposed generator of the CPPM signals is implemented by the combinations of beam splitters, phase shifters and mirrors.