- #1
mp3car
- 82
- 7
If you have a satellite that is transmitting at X dbm to a ground station, will increasing the gain of your LNA allow the satellite to use less transmit power? It seems like you'd have to improve the SNR in order to increase BER or Eb/No... If you just increase gain of the LNA, then yes, your signal out of the LNA would be stronger, but so would the noise, which would give the same bit error rate as the lower LNA gain... Is my thinking correct? It seems in order to decrease required transmit power of the satellite and have the same BER at the ground receiver, you would have to do something to improve the SNR... and you can't really do anything to reduce atmospheric/solar noise, right? You could make a "cleaner" first stage in the LNA i suppose, but "just" increasing the gain of the LNA as a whole seems like it wouldn't really allow you to lower satellite transmit power...
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