测量速度: 经过CFAR检测之后然后检测峰值确实会得到Range 和Doppler的峰值索引,也就是多个chirps测速法,但是最大不模糊速度为十几m/s,在实际使用中并不满足需求超出不模糊速度就会产生速度模糊,因此需要对速度扩展,中国余数定理是很好的速度扩展算法,对速度进行解模糊。后面博客会对讲解中国余数定理原理和在雷达中的应用...
figure % Ploting the Doppler - Range Grapgh image([-500 500],[-15 15],200*log10(abs(FFTMatrixCube'))); xlabel('Doppler') ylabel('Range') figure X = 1:1:1000; plot(X,abs(Sfilterd)) hold on plot(X,abs(S)) hold off legend('Clutter','Filter output') L1 = 1:1:1024; M1...
function[d1,d2]=helperSurfaceDopplerLimits(freq,alt,spd,dive,maxRange)% Return the Doppler limits of a flat surface.% Depression angle to max rangeifmaxRange<altmaxRangeDep=90;elsemaxRangeDep=90-acosd(alt/maxRange);end% Normalized maximum closing rateifdive<maxRangeDepmaxClosing=cosd(maxRang...
%MITIAPRadarCourse2011 %Resource:BuildaSmallRadarSystemCapableofSensingRange,Doppler, %andSyntheticApertureRadarImaging % %GregoryL.Charvat %ProcessDopplervs.TimeIntensity(DTI)plot %NOTE:setVtuneto3.2VtostaywithinISMbandandchangefctofrequency %below clearall; closeall; %readtherawdata.wavefilehere [Y,...
- rangeDopplerFFT:用于进行雷达信号的Range-Doppler变换,实现信号的时域和频域分析。 - CFAR:常见的常规象限保护比(CFAR)算法,用于检测雷达回波中的目标。 - plotRadarData:用于雷达数据的可视化,绘制图形展示数据的特征和分布。 通过这些函数,我们可以实现对雷达数据的基本处理和分析,从而深入理解数据的含义和特征。
RDM(RDM~=0 & RDM~=1) = 0;figure('Name', 'CA-CFAR Filtered RDM')mesh(doppler_axis,range_axis,RDM);title( 'CA-CFAR Filtered RDM surface plot');xlabel('Speed[m/s]');ylabel('Range[m]');zlabel('Amplitude[dB]');%%$ ending ...
figure; plot(signal);hold on; plot(cell2mat(circshift(threshold_cfar,G)),'r--','LineWidth',2);hold on; plot(cell2mat(circshift(signal_cfar,(T+G))),'g.','MarkerSize',14);legend('Signal','CFAR Threshold','Detection'); %2-D CFAR on Range-Doppler Map%1. Determine the number of Tr...
% plot(db(abs(fft(Mix(1:1024*256))); % xlabel('频率'); % ylabel('幅度'); % title('中频信号低通滤波器'); %reshape the vector into Nr*Nd array. Nr and Nd here would also define the size of %Range and Doppler FFT respectively. signal...
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RangeDopplerResponse('PropagationSpeed',c,... 'DopplerOutput','Speed','OperatingFrequency',fc,'SampleRate',fs_d,... 'RangeMethod','FFT','PRFSource','Property',... 'RangeWindow','Hann','PRF',1/waveform.SweepTime,... 'SweepSlope',waveform.SweepBandwidth/waveform.SweepTime,... 'Range...