y2compdb = 20. .*log10(y2comp); figure(3) plot (tt,y2compdb,'k') xlabel ('Relative delay - seconds'); ylabel('Normalized compressed pulse - dB') grid ⛄ 运行结果 ⛄ 参考文献 [1]戴巧娜. 基于MATLAB的LFM信号脉冲压缩及模块化实现[J]. 火控雷达技术, 2008(4):3. [2]谢少毅. 基...
/ maxval; figure(3) plot (tt,y2comp,'k') axis tight xlabel ('Relative delay - seconds'); ylabel('Normalized compressed pulse') grid ②、仿真结果 1) LFM 信号 2) 脉冲压缩处理器的压缩脉冲输出 3) 失配的压缩脉冲,5%多普勒频移 4) 失配的压缩脉冲,10%时间膨胀 三、资源自取 脉冲压缩思维导图...
7、2*pi* (fd2*t+0. 5*mu*t. 2) ; %频移干扰信y=yl+exp(j*pi*mu*t. 2)+y2+y3;%产生叠加了干扰的LFM信号yfft=fft(y, 1024);win = hamming(Ns)J;h_w二h. *win;hfft_w=fft(h_w, 1024);ycomp = abs (ifft (yfft . *hfft_w) ;%脉冲压缩maxvail = max(ycomp);ycomp_w ...
①、MATLAB 源码 % use this program to reproduce Fig. 5.14 of textclear alleps = 1.5e-5;t = 0:0.001:.5;y = chirp(t,0,.25,20);figure(1)plot(t,y);yfft = fft(y,512) ;ycomp = fftshift(abs(ifft(yfft .* conj(yfft)));maxval = max (ycomp);ycomp = eps + ycomp ./ m...
%% 基本参数clc;clearall;closeall;T=10e-6;% LFM周期/脉宽 10usB=60e6;% LFM带宽 60Mhzfs=100e6;% 采样率 100MHzK=B/T;%% 模拟发射信号n=round(15*T*fs);t=linspace(-10*T,10*T,n);lfmT=rectpuls(t,T).*exp(1j*pi*K*t.^2);lfmF=fftshift(fft(fftshift(lfmT)));f=linspace...
function chirp_pc_result = Chirp_Pulse_Comp(LFM_Fre_Width, LFM_T_Width, Window_Type, Fs) T = [0: 1/Fs : LFM_T_Width]; F0 = -LFM_Fre_Width/2; %F0 = 0; %如果F0=0, 加窗后脉压的结果中的主瓣有分裂; 用复chirp信号仿真就不存在这个问题 ...
function x=lfm_ambg(taup,b,up_down) % taup 脉冲宽度; % b 带宽; %up_down=-1正斜率, up_down=1负斜率 eps=0.0000001; i=0; mu=up_down*b/2./taup; for tau=-1.1*taup:.01:1.1*taup i=i+1; j=0; for fd=-b:.01:b j=j+1; val1=1-abs(tau)/taup; val2=pi*taup*(1-abs...
RCS in meter squared% Output% y == normalized compressed output%clcclose allclear alltau = 1e-6;b = 50e6;fs =5*b;rcs = 1;range = 150;nnoise = 0.05;n = ceil(tau*fs); %Number of sample points of chirp signalc = 3e8;ts = 1/fs;t = 0:ts:ts*(n-1);% Transmitted LFM ...
y=y1+exp(j*pi*mu*t.^2)+y2+y3; %产生叠加了干扰的LFM信号 yfft=fft(y,1024); win = hamming(Ns)'; h_w=h.*win; hfft_w=fft(h_w,1024); ycomp = abs(ifft(yfft .*hfft_w)); %脉冲压缩 maxval1 = max(ycomp); ycomp_w = eps + ycomp ./ maxval1; % 利用ycomp的最大值...
11、5) plot(J*100,I/10,.) axis(-110 110 -1 1) xlabel(Delay - mus) ylabel(Doppler - MHz)%6db维坐标变换 时间维坐标变换的等高线title( grid on %function % taup % b模糊函数6db的等高线)巾见;模糊函数-x=lfm_ambg(taup,b,up_down)脉冲完度;一%up_down=-1 正斜率,up_down=1 负斜率ep...