Analyses And Realization On Locating Satellite Jamming Based On Matched Filter Theory

For the Satellite Communications, the most difficult thing to be solved is Satellite Interference. Wide coverage and broadcast style of communication are the characters of satellite. These make it very difficult to find where the interference carrier is. Some of interference can be found basing on carrier analysis, but most of them belong to unknown carrier.Currently, there is a more advanced technology base on signal correlation theory. There are a few companies overseas using this technology, but none in civil. The method is: getting two series data's using antennas in the earth from two satellites, one is the satellite being interfered and another is the satellite that can get same interference near it. Then calculate delta range of these two satellites to position the interference base on signal correlation formula. Through research and experimentation, this thesis not only state a way based on the theory of matching filter to calculate the position of the intruder but also generate a primary software to carry out the calculation.Through studies, we found that the most workload of this project is calculation besides the development of theory. Foreign companies use special designed circuit to calculate, but the cost is huge. In order to decrease cost much more, adopted parallel computing in realization, applied the fast convolution theory in arithmetic, used C++ inline assembler to develop the core calculation model, made use of Java to develop parallel management system for its advanced net-development function. So we can use our local network resources to finish calculation in the effective time.Based on the experimentation, we can use this software to locate the interference line with the input data created by Matlab, meanwhile this parallel software can accelerate original software by many times, and the multiple is proportional to the numbers of PC in the network.