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receiver documentation

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[UHF receiver | VHF receiver]

At the most fundamental level, a radar receiver has three tasks:

  • Selecting that part of the EM spectrum, and those windows in time, which contain the wanted scatter signals,

  • Rejecting all the rest of the frequency and time domains,

  • Amplifying the selected signal to a level where it can be conveniently processed.
The ideal receiver should do this without corrupting the wanted signal at all, whether by adding noise to it or by distorting it.

While there is of course no such thing as an ideal receiver, very good approximations can be constructed.

Gain

If the RMS signal voltage at the receiver input is UIN and the desired RMS voltage at the receiver output is UOUT, the required input-to-output voltage gain is

G = UOUT / UIN

We can now estimate how much gain is required in the EISCAT UHF receiver.

Created by admin
Last modified 2005-10-16 13:57