The Research Of Optical Commucation And APT System Based On DSP

Recently ,along with the development of space, semiconductor laser and digital signal processing, the research of optical inter-satellite communications is possible. As microwave communication can't meet for quickly increasing recently demand for bandwidth, it is necessary for developing optical inter-satellite communications techniques. But the acquisition, pointing and tracking (APT) are critical and difficult issues in optical inter-satellite communications. So, this project is aimed at implementing a quickly tracking system with high performance to establish the steady optical links.To approach practical system, some unit model is built by practical test. And to make PID parameters adjustment easily, what influence will happen when PID parameters is changed is studied in this dissertation.Finally, on the basis of above research, a coarse tracking demonstration system is designed by DSP. Through the tracking experiments by this demonstrator and communication system, results show that the system satisfies the requirement of project.