The Research Of PN Code Acquisition In DS-CDMA System

With the communication technique development, the direct-sequence spread spectrum communication system demonstrated his specific strength of life. But PN code synchronism and PN code acquisition are key technique in direct-sequence spread spectrum communication system.As a result,it is necessary and practical to discuss the problem. On the other hand,the theory of wavelet analysis is developing.It leads to many applications in signal singularity detection.Because wavelet analysis is characteristic of multi-resolution,there are strong advantages distilling the message from signal by wavelet analysis in signal singularity detection. Key points of this thesis: Firstly, I introduced the background, generation, current status, applications and advantages of spread spectrum communication and wavelet. And then introduced the old means of PN code acquisition and points out their disadvantages.On the basis of the old means,I produced two means of wavelet acquisition. It proves that there are many advantages by experiment of simulation and theory analysis...