How can I generate a noise with a required sensitivily power ? i.e. -174 dBm

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DEAR ALL:
Iwant to simulate a RF system, the question is how can I generate a noise with a required sensitivily power ? i.e. -174 dBm. Please help me, thanks

回答(2 个)

Paul
Paul 2014-3-7
编辑:Paul 2014-3-7

Iain
Iain 2014-3-7
First: calculate the power value.
-174dBm, is 17.4 orders of magnitude down from "milli", so
noise_RMS = 0.001 * 10^-17.4;
Calculate a random signal of "x" elements:
random = randn(x,1);
Scale it to the right "rms"
noise_RMS*power

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