Network And Transmission Channels Study Based On LMDS

Inner Mongolia ChiFeng city telecommunications company's LMDS which is regarded as the last one kilometer receiving transmitting technology reforming item has been studied in this paper.There has been built LMDS comprehensive multiprofessional works receiving stations and multi-user receiving stations in ChiFeng city and out of the cityo The feasibility of the scheme has been tested by experiments and attain the valuable datas at the same time.the LMDS terminal interface bearing multiprofessional works has been designed.The wireless transmitting channel affects the wireless communication system basicly.There has not only built the related modles of the LMDS channel transmitting performance and study in theory but also analysed the interference in theory, especialy majored in study on rain attenuation against LMDS. With the development of wireless technology,the problems of raising resistence attenuation,disturbing , spectrum utilization have been solved by adopting the OFDM; Using bipolar ATPC technology resisting rain attenuation.