文档介绍：Abstract
AB STRACT
GPS has a great impact on navigation,positioning and precise hit,and it has been widely used in the American ,it shows many problems in the anti-jamming to the faint signal that arriving at the earth surface, easily be interfered in plex ic surroundings,especially the C/A code signal,and it has became effective ways and means striving for navigation it is very significant to study the design of GPS receivers under jamming
environments.
Firstly,this paper simply introduces the form and structure of GPS signal,and gives a whole understanding of the analyzing the characteristic of GPS signal,the anti-jamming ablity of GPS receiver and the method in which interference works Oil receiver,a conclusion that the oppressive interference is the most menace to GPS receiver is then,an effective anti-jamming technique is put forward in allusion to the ,this dissertation fastens one’S attention upon the study of GPS anti-jamming means in the precondition of the anti-jamming technique.
Several schemes ar e put forward,whose performance is analyzed and discussed in
detaiL
During the research,the different antenna arrays are simulated pared based on the understanding of the rules and special gives a detailed discussion between space-time filtering and spacial filtering at the basis of circular advantages and disadvantages are given based on the simulation a view to
actual interference environment and the initial stage of this research,a suitable
interference suppression algorithm is improvements are made and the
anti-jamming performance is greatly improved.
Finally,the FPGA design’S results are given in design flow and RTL drawing of vital modules are put experiment results shows the design in this thesis iS valid.
Key words:GPS,Anti—Jamming,Space,Space—Time,FPGA
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