The Digital Reconstruction Of Radio And Television Microwave Transmission Circuit In Inner Mongolia

Microwave,satellite and optical cable are three most important ways of radio and television signal transmission.Comparing with optical cable and satellite transmission,the microwave transmission has the advantages of low cost,strong capability of resisting disasters and relatively simple network,therefore it still occupies irreplaceable position in the radio and television secured transmission.Different with the analog microwave transmission circuit,the digital microwave transmission circuit has higher transmission capacity,stronger antijamming capability and better quality of received signals.Therefore,in 2013,Radio,Film and Television bureau of Inner Mongolia completed a project of digital reconstruction of microwave transmission circuit to replace the old analog microwave transmission circuit.Based on the actual overall situation of the project,this paper gives an introduction and analysis to the microwave transmission circuit digital reconstruction project from a technical viewpoint.In chapter one of this paper,an introduction is given to the background of project.Following that,the overall project and the budget plan of the project are explained in chapter two.In chapter three,proposed solutions to minimize the trans station interference are discussed.The performance of solutions is also analyzed with the consideration of multipath decline in this chapter.In chapter four,an area with completed digital reconstruction has been used as an example to demonstrate the calculation and analysis of transmission clearance.Another example is given in chapter five,which employing the concept of effective fading margin to calculate the.outage probability.Moreover,the comparison between frequency diversity improvement and space diversity improvement is also given in this chapter and compared with the given target performance value.In the last chapter,the test results of two key performance indicators of east and west microwave circuit,i.e.,ESR and SESR,are shown to determine whether the transmission quality of the circuit meets the values of index.