The Implementation of PPM in Underwater Laser Communication System

This paper tries to introduce one of the methods how to realize the PPM modulation by the use of single chip computer. This technique can effectively improve the synchronization puzzles confronted during the process of laser underwater communication system; improve the coding efficiency of the laser communication system; could be integrated into one system by using single chip computer controlling mode. For the system communicates data with computer via asynchronous series port so that the demodulator can be made simple and cheap, can be fulfilled code by single chip computer and can be separated apart from the computer. At the end, this paper concludes the advantages for this application such as simple circuit design, stable working reliability