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User:Crecasens

68 bytes added, 11:39, 30 January 2013

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== Basic radar Theory ==

You can check chapter 9 of the user manual to get more in detail about radar theory. Basically, a radar with linear frequency modulation follow the next equation:

<br>'''hzpm =2*BW/(V*T)'''<br><br>This equation gives the relation between the target distance and its corresponding IF frequency (hzpm) where:

'''hzpm''': "Herz per meter" is the ratio between IF signal frequency (in Herz) and target distance from radar (in meters)

'''BW''': RF output frequency bandwidth in Hz<br>'''V''': media electromagnetic wave propagation speed (3*108m/s by default).<br>'''T''': FM linear Modulation sweep time in seconds.

<br>

In our example, as the default modulation has the next paramenters:

In our example, as the default modulation has the next paramenters:BW=250MHz

BWT=250MHz1,311ms

TV=1,311ms3*108m/s<br>the resulting hzpm is 1271Hz/m

V=So, if the measured IF radar signal frequency is 4,609KHz it means the target is at a distance of 3*108m/s<br>,6m from the resulting hzpm is 1271Hz/mradar.

So, if Considering the measured IF radar signal frequency is 4has an offset of about 0,609KHz it means 35m (we will see later why) the target distance is at a distance of 3,6m from the radar.25m<br>

Considering the == Basic radar has an offset of about 0,35m (we will see later why) the distance is 3,25m<br>Theory == You can check chapter 9 <br><br>

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Carles Recasens

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