雷达预警基于matlabGUIRADAR预警雷达模拟【含Matlab源码2904期】.zip

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【雷达预警】基于matlab GUI RADAR预警雷达模拟【含Matlab源码 2904期】.zip （52个子文件）

【雷达预警】基于matlab GUI RADAR预警雷达模拟【含Matlab源码 2904期】

createTargetObj.m 1002B

radarSimulation.fig 1.46MB

ociloscopeOff.JPG 14KB

soundOff.JPG 11KB

analyzBufferWithMTI.m 1KB

displayTargets.m 2KB

analyzBuffer.m 3KB

soundOn.JPG 8KB

radarSimulation.m 33KB

运行结果.jpg 169KB

placeClutter.m 393B

MTIcalcVelocityFromFourier.m 816B

targetsReturn.m 2KB

ociloscopeOn.jpg 11KB

loadFile.do_files

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question.gif 64B

preview.jpg 19KB

site3.css 3KB

Captcha.htm 7KB

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fullstar_grey.gif 145B

createTargets.m 1KB

plotTarget.m 911B

loadFile.do.htm 44KB

buildAntenaGain.m 799B

calcDiffAngle.m 326B

Radar Simulation Instructions.doc 237KB

changeGuiColors.m 546B

dAngle.m 97B

runRadarSim_v2.m 23KB

handleRadarControlls.m 536B

plotDistLines.m 462B

plotFOV.m 1KB

RADAR simulation

Written by: Yonathan Nativ

Preview .............................................................................................................................................................................2

Quick start.........................................................................................................................................................................2

Details ...............................................................................................................................................................................2

Professor comments..........................................................................................................................................................2

Main Files & Functions ....................................................................................................................................................3

The Radar Simulation GUI...............................................................................................................................................4

Main RADAR display ......................................................................................................................................................5

Radar Controls ..................................................................................................................................................................6

Simulation Controls ..........................................................................................................................................................7

Preview

I made this simulation as a project in a course I took in RADAR basic concepts.

The RADAR is an Early Warning RADAR. The simulation simulates targets around the RADAR, calculates the

expected return pulses and adds noise. The simulation works at the Intermediate Frequency (IF) level and I assume

perfect phase reconstruction by the RADAR.

Quick start

1. Run "radarSimulation.m".

2. Press “Start”.

Details

It is a simulation of an early warning radar. The simulation generates random targets (coordinates, velocity,

acceleration & Radar Cross Section (RCS)).

For each radar pulse the simulation calculates the returns that the radar will receive from all the targets according to

the radar formula (taking into account transmission power, antenna gain, targets distance & targets RCS). The

simulation calculates the amplitude & phase of the return signal (according to the IF frequency).

The radar builds a vector of its samples as complex signals (representing amplitude and phase delay) and adds it to

complex random RF noise. The vector goes through a LPF representing the receiver BW and then I add another

complex random noise representing the radar's thermal noise (in the digitizer).

The radar saves several reception periods to a buffer and then processes the entire buffer. The radar can perform a

match filter over the received signal. The radar analyzes each range cell in the buffer in search of a target.

Detection threshold can be fixed or dynamic according to the buffer statistics (a sort of Constant False Alarm Rate

(CFAR)).

In case Moving Target Indicator (MTI) is used the target detection is done in the frequency plane of the complex

signal.

Each detected target is plotted on the main radar display. In case MTI is used a representation of the target’s velocity

is also plotted (stationery targets are plotted as mountains). Take notice that the radar can only estimate the relative

velocity between the target and the radar (any tangent velocity is lost).

Professor comments

My professor had several remarks about how bad this simulation is (the remarks were made on the previous version; I

worked to correct some of them in this version). His remarks where:

- My match filter isn't really matched (it's true I matched it to square pulse and not to a band limited pulse).

- My noise levels have wrong units and aren't realistic (it might be true but you can control it as you wish so it isn't a

real problem).

- Moving Target Indicator doesn't work the way I implemented it (might be true but I think my way is really good).

- The CFAR mechanism doesn't exist (yep I got sloppy but you can easily control the threshold so it's good enough

and it is still just a simulation for a very small course!).

Changes in this Version

� Match filter was corrected (matches the real pulse shape).

� MTI works in frequency domain.

� A simple CFAR mechanism was added (really improves performance).

� Stagger support was added.

� Persistency display was added (detected targets stay on the display – revealing target’s path).

� Semi Analog feedbacks were added (audio & video).

� Targets maneuvers behavior was changed (still not perfect though).

� Massive profiler work was done to improve real-time performance (in 50 kHz sampling rate & no analog

feedback the simulation time is correlated to real-time).

Though I think the noise generating mechanism is still not very realistic.

Main Files & Functions

� radarSimulation.m – GUIDE file, handles all the GUI callbacks.

The simulation is handled in “run_Callback” function.

� runRadarSim_v2.m – Main simulation handling function. Basically this function is a while loop which keep

transmitting pulses and processing them. The function main parts are transmitting, adding noise & processing

the radar buffer.

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