Wireless Video Transmission System And Network Design Based On OFDM Technology

Today, communication network has been developed very mature. Communication network is more perfect than before and its function is increasingly powerful. When a natural disaster or other calamity happen, network may be paralyzed. It is becomming more and more important to set up communication network. In the emergency communication, the importance of video communication systems was embodied in natural disasters, public security and military system. However, because the shortcommings of cable video on flexibility and mobility, wireless video communication technology has been a highlight of the society's need.The research is about the wireless video transmission system's equipment implementation and network application on 340MHz band.We focus on the completion of the wireless transceiver and baseband circuit board design and equipment network modelling. The technical difficulties of this research is the design of linear power amplifier of RF transceiverand and receiver's automatic gain control part. After many model selections and experiment validation, we accomplished the physical hardware platform's implementation of the 340MHz wireless video transmission system. And we also finished the functional testing in several basic network models. At last, the original task was achieved well.In this paper, the structure was divided into four parts. First, we introduce the technology related to application of wireless video transmission system. The second part describes the architecture design and implementation of system's base-band circuit hardware. In the third part, we introduce the system's RF hardware architecture and implementation. The fourth part focuses on the integration of wireless video transmission systems and equipment design and optimization of network testing.