The Research And Design Of L-Band Receiver With DS/FH

There are three independent systems to implement communication, navigation and recognition function in moden communication. These systems are unrelated to each other by constrained line of sight. It makes this kind of system poor survival and anti-jamming/damage capacity, and does not satisfy demands in modern battle filed.According to this reason we need an integration of these three systems tcollaborating with each other. The Combined Tactical Information Dispatch System is one of these kinds of integration system. It is an information pool with non-node network structure. Every component receives and sends signal using it to connect all fight units together. That’s why The Combined Tactical Information Dispatch System can be uesed as a powerful weapon realizing recognition, communication and navegation function It works on hybrid spreading mode that fuses Direct Sequence Spreading System(DS-SS) and Frequency Hopping System(FH) into one information processing system, leading to strong anti-jamming capacity. The direct sequence spreading/frequency hopping receiver(DS/FH receiver) is the key device for every network user because it dominates performance of the whole system.In this thesis we design and realize a DS/FH receiver. Firstly we analyze the features of common DS/FH combined spreading communication and MSK modulation method of modulation theory. Secondly we present a hardware framework design of this DS/FH receiver, including multichannel radio frequency front-end component, correlation dispreading component using a programming surface acoustic wave correlator, synchronous dis-hopping demodulation component, Direct digital frequency synthesis component and DS/FH synchronization component. Lastly we use Systemview Inc. Software toolbox to simulate and analyze the anti-jamming function of our DS/FH receiver. The result shows that our DS/FH receiver has high anti-jamming/interception performance.