Research On Theory Of Spread Spectrum Signal And Method Of Best Jamming

Spread Spectrum System has a strong antijammingcapability and strong security.It can be used for multiple access communications. Spread Spectrum Systems has beenwidely used for antijammingcommunication. This paper is a study of thespreadspectrumsignal detection in noncooperationcondition.This paper presents spread spectrum signals that includes Direct Sequence SpreadSpectrum(DSSS) and Frequency Hopping Spread Spectrum(FHSS), it is focused onresearch the detection method of both and briefly introduce method of jamming.Meanwhile the paper considers parameters need to be detected from the perspective ofjamming. The current detection method of spread spectrum signal is not ideal andnecessary to explore more effective detection method.We combine method of wavelet transform and cycle spectral correlation to detectspreadspectrumsignal. The wavelet transform is the engineering approach? we shouldchoose different mother wavelet in different application background. This paper choseMorlet wavelet as mother wavelet because that Morlet wavelet is complex wavelet butmany of other wavelets are real ones. The kind of this wavelet not only has betterperformance but also have a simpler module. The paper has a academic derivation andfactual simulation about rational setting of parameters of wavelet when using thiswavelet.The paper give detection method and simulation result of BPSK and BFSK signals,then it compares with other methods. Finally, the direction of development of noiseelimination when detecting signal and signal detection with wavelet transform is given.