Application And System Implementation Of OFDM Technology In Wide Band Long Distance Wireless Communication

Long distance wireless communication has provided effective support for battle filed communication and contingency control system. It is an important area in wireless communication filed. Recently, long distance wireless communication systems have faced new requirement. People want to transmit more and more information than before.Base on the study of wireless communication channel and some problems encountered, proposes a project solution: a wide band long distance wireless communication system based on OFDM technology and SOFTWARE RADIO technology.In the chapter 1, the article gives a brief introduction of the long distance wireless communication. Then describes the basal theory of software radio and gives the key technology in software radio field. OFDM theory with its advantages and disadvantages are also introduced here. The last gives the target of this thesis.In the chapter 2, first gives an overview of the wireless mobile communication channel. Then the theory of OFDM is described here detailedly. After that, discusses the algorithms of the digital signal processing in OFDM system. According to the simulation result, finds out the advantages and disadvantages of each scheme.In the chapter 3, based on the wireless communication circumstance, gives a whole project solution for the wide band long distance wireless communication system. Then describes each module of the system. According to the problems encountered in debug, the improved schemes for some key technology are presented. At last, the processing architecture is proposed for the frequency hopping application.In the chapter 4,first gives the result of system simulation. Then the hardware platform and software processing architecture are introduced here. At last, the result and some figures are showed.