pulse-DopplerX-bandradarA narrow band radar system based on a field programmable gate array is proposed for dual-mode operation.Frequency-modulated continuous-wave (FMCW) radar mode is for short-range target detection and pulse-Doppler (PD) radar mode is for long-range target detection. ...
FMCW and pulse Doppler (PD) radars possess distinct characteristics that are optimized to provide specific measurements for varying applications. For example, the FMCW radar does not suffer from blind range and speed measurements. A PD radar, on the other hand, can reach long range due to its ...
In addition, even though it is possible to extract the Doppler information from a single sweep, the Doppler shift is often extracted among several sweeps because within one pulse, the Doppler frequency is indistinguishable from the beat frequency. To measure the range and Doppler, an FMCW radar ...
% Pulse repetition interval for TDM-MIMO radar tpri = fmcwwav1.SweepTime*Nvt; % Maximum unambiguous velocity vmaxunambg = lambda/4/tpri; % Plot range-Doppler map helperRangeVelocityMapPlot(XrngdopTgt,rngresp.SweepSlope,... fmcwwav1.SampleRate,tpri,rangeMax,vmaxunambg,Nrange,Ndoppler,lambda...
time+fmcwwav2.SweepTime;% Move targets forward in time for next sweeptgtPoses(1).Position=[tgtPoses(1).Position]+[tgtPoses(1).Velocity]*fmcwwav2.SweepTime;tgtPoses(2).Position=[tgtPoses(2).Position]+[tgtPoses(2).Velocity]*fmcwwav2.SweepTime;end% Truncate interference pulse train to ...
This is known as pulse compression that is achieved with the help of matched filtering.Now let us find out how an FMCW waveform looks like.FMCW WaveformFrom a basic complex sinusoid that includes a linear instantaneous phase, we can move towards a basic chirp by extending it into a quadratic...
The pulse can be created by an incoherent LED source or a high-power mode-locked laser, depending on system cost, optical output power, or power consumption constraints. The depth resolution of such a system is limited by the timing resolution in electronics. This indicates that the minimum ...
The effect of Doppler shift on the altitude estimate is removed by averaging the upsweep and downsweep altitude. The effectiveness of the altimeter algorithm can be checked by comparing the measured altitude to the ground truth altitude. For the first simulation step, the estimate is less than ...
The effect of Doppler shift on the altitude estimate is removed by averaging the upsweep and downsweep altitude. The effectiveness of the altimeter algorithm can be checked by comparing the measured altitude to the ground truth altitude. For the first simulation step, the estimate is less than ...
Pulsewidth: 1.6900e-05 TiltAngle: 0 Wavelength: 0.0039 SystemTemperature: 4.5962e+03 tgtRg = 26;% Target range (m)singleSweepSNR = interp1(target.ranges,availableSNR,tgtRg) singleSweepSNR = 46.4858 coherentIntGain = pow2db(lrrSysParam.NumCoherentPulses) ...