【雷达抗干扰】压制干扰（噪声调频、调幅干扰）抑制【附MATLAB代码】

MATLAB代码

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close allclear allwarning offfADC = 10e6; %sampling ratefCar = 4e6; %carrier frequencyTtotal = 7.5e-6; %total time durationT = 5.5e-6; %signal durationA = 1; %signal amplitudenum_jam = 2;t = 0:1/fADC:T - 1/fADC; %signal time
tTotal = 0:1/fADC:Ttotal - 1/fADC; %time axis
Nspace = round((Ttotal - T)*fADC/2); %points of time without signal
%Generate MP signalsigMP = A*exp(j*2*pi*fCar*t); %Generate the MP signalsigMP = [zeros(1,Nspace),sigMP, zeros(1,Nspace)];
%Generate BPSK signal (11 bit Barker code)Len = length(t);Ncode = 11;for kIndex = 1:Len if kIndex<Len/Ncode sBPSK(kIndex)=1; elseif kIndex<Len/Ncode*2 sBPSK(kIndex)=1; elseif kIndex<Len/Ncode*3 sBPSK(kIndex)=1; elseif kIndex<Len/Ncode*4 sBPSK(kIndex)=-1; elseif kIndex<Len/Ncode*5 sBPSK(kIndex)=-1; elseif kIndex<Len/Ncode*6 sBPSK(kIndex)=-1; elseif kIndex<Len/Ncode*7 sBPSK(kIndex)=1; elseif kIndex<Len/Ncode*8 sBPSK(kIndex)=-1; elseif kIndex<Len/Ncode*9 sBPSK(kIndex)=-1; elseif kIndex<Len/Ncode*10 sBPSK(kIndex)=1; else sBPSK(kIndex)=-1; endendsMP = A*exp(j*2*pi*fCar*t); %Generate the MP signalsigBPSK = sMP.*sBPSK;sigBPSK = [zeros(1,Nspace),sigBPSK, zeros(1,Nspace)];
%Generate LFM signalB = 4e6;chirpRate =B/Ttotal;sigLFM = A*exp(j*2*pi*fCar*t + j*pi*chirpRate*t.^2);sigLFM = [zeros(1,Nspace),sigLFM, zeros(1,Nspace)];
%Generate NLFM signala1 = 1e11;a2 = 5e16;sigNLFM = A*exp(j*2*pi*fCar*t + j*pi*a1*t.^2 + j*pi*a2*t.^3);sigNLFM = [zeros(1,Nspace),sigNLFM, zeros(1,Nspace)];
%Input signalsig = sigLFM;%change signal type for different inputfigure;plot(tTotal*1e6,sig)xlabel('t/us')ylabel('Amplitude')
sig = awgn(sig,1000,'measured');figure;plot(tTotal*1e6,sig)xlabel('t/us')ylabel('Amplitude')title('无干扰回波时域波形')