We are happy to see that after a long preparation, this course is eventually on-line.We can provide more resources and interact more on this website platform. On one hand, it is obvious that the students in class are in need of the practiceon communication systems implementation. On the other hand, the experiments also brings benefit for their understandings of the communication theory.During the course, we are trying best to show what an actual communication system will be, such as the communication hardware platform, digital signal processors, and the development process. By studying this course, we believe the students can have a better view of the communication theory and the real communication system. And finally, we are very glad to be the lecturers of this course and we welcome any suggestions for this course from the peer experts and students.