Multi-component LFM Signal Suppressing Based on Modified Discrete Chirp in DSSS System
Changqing Li · Modern Electronics Technique · 2009
For the disturbance and suppressing of multi-component linear frenquency-modulated signal in a Direct Sequence Spread Spectrum(DSSS) system.The basic theory and quality of modified Chirp-Fourier for a signal is introduced.Based on that,the mothod which modified chirp-Fourier and excised adaptive filter together for the detection and suppressing of multi-component LFM signals are put forward.Modified Chirp-Fourier transform is used as an effective technique for the fixing and modulating frequency to estimate each LFM signal in multi-component signal.Adaptive filter can eliminate one after one,and it is good to suppress LFM signal.The simulations show its effectivity.