To solve the limitation that conventional spread sptrum communication suffers from PN sources，a scheme of double Code Phase Shift Keying (CPSK) Spread Spectrum (SS) communication system was proposed,in which synchronization is achieved by synchronization code based on specia phase. In the system, information is transmissioned by orthogonal channels,and all SS codes come from one SS code by cyclic shifting.Synchronization is achieved by a same synchronization code which have the same special code phase in orthogonal channels, so a high correlative peak is produced in the synchronization process, which is easy to distinguish. The simulations demonstrated that the proposed shceme is easy to achieve synchronization and is effective in improving the utilization of system resources comparing to direct sequency spread spectrumm.
