Research On COFDM Wireless Image Transmission System

Along with the progress of the society, economy and the development of science and technology and the improvement of people’s living standard, people’s requirements on the security Home Furnishing is more and more high, seek to obtain Home Furnishing real-time image information at any time, so it is the development and application of wireless transmission system, and the upgrading of technology. In recent years, orthogonal frequency division multiplexing (COFDM) technology has been widely used, and gradually replace single carrier spread spectrum technology (such as CDMA) has become the core technology of the mobile communication system in the new era. With the digital TV broadcasting gradually into people’s lives, COFDM video transmission technology because of its high transmission speed, high spectrum utilization rate, strong diffraction capability and by domestic company or enterprise application security protecting and rescuing the disaster site, provide the guarantee for the safety of people’s life and property. But because of the domestic to master this technology is not much, cause the COFDM video transmission technology and equipment is expensive, is not cost-effective, so the research of this technology can be said to be the focus of the domestic many companies of this kind or that is the focus of. This research is based on this reason, in view of safety protection and fire rescue and other applications of COFDM wireless video transmission technology, understand the technology more in-depth, provide convenience for security and disaster relief.This paper first introduces the current situation of the research background and significance, the COFDM wireless transmission technology development and the main research content, and then briefly introduces related to the COFDM wireless transmission technology of video, channel coding and digital modulation technology, from the relevant aspects of wireless transmission technology, and then according to the author of the usual learning and on large amounts of practice and understanding of knowledge, combined with the actual situation and the related domestic enterprises and the requirements for this technology, the development of the overall scheme and the hardware design of COFDM wireless video transmission system, the requirements analysis of the core parameters of the wireless transmission system with professional knowledge and specific to the chip. Since then, the main chip, the design of FPGA software COFDM modulation module in detail, and then the author designs the modules of the system to do simulation test simulation, according to the specific results of the test, analysis of the application of professional knowledge, the improvement measures and then develop system design, repeated testing. Results show that the COFDM wireless transmission system is capable of continuing to work long hours to ensure stable and can meet the requirement of practical application security, fire and rescue and other fields, has a strong practical value, a further research and development value, it is worth popularizing in application.