DRFM of Digital Channelization Based on Fractional Fourier Filtering
In the modern battlefield environment,electromagnetic is becoming more and more intensive and complex,and all kinds of signals are mixed with each other.At the same time,various coherent radars adopt pulse compression technology and coherent processing method,and their anti-noise and anti-jamming abilities are greatly enhanced.In particular,the use of linear frequency modulation(LFM)signal meets the radar's high power,low interception function design requirements,and anti-jamming ability has been improved too.Conventional digital radio frequency memorization(DRFM)adopts wideband sampling,and modulates the wideband signal by frequency modulation and superposition.The modulation style and parameters are the same in the instantaneous bandwidth.When multi-signals are in the instantaneous bandwidth,different modulation patterns can not be applied,which leads to extensive interference and inaccuracy.In order to achieve accurate and effective jamming coherent pulse compression radar,a digital channelized jamming design using frequency domain subband processing and fractional order Fourier filtering is proposed to enhance the denoising ability of LFM signal,and the false target jamming signal is formed by DRFM technology,and the effective jamming is implemented.
digital channelizationdigital radio frequency memorizationfractional Fourier transformlinear frequency modula-tionpulse compression
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