On 7/15/2010 1:00 PM, bjoe...@ee.ethz.ch wrote:
Zitat von "Matt Ettus" <m...@ettus.com>:
The USRP + BasicRX will have a noise figure of around 35dB, since it
has no amplification. If designing a daughterboard, you can use that
number as the noise figure of the ADC for your calculations of the
overall noise figure.
Matt
Hi,
Thanks a lot for your help!
Can I also use those 35db as the total noise at the input of the USRP to
compute the signal to noise ratio?
For that I'd also need the transmitting Power Pt. Would you by any
chance also have an idea how i could figure out Pt?
Not quite. Noise figure is a measure of the degradation of SNR, so if
you know your input SNR, you would know that the measurements from the
USRP will have a 35 dB worse (lower) SNR. Alternativley, you know your
input SNR is 35 dB better (higher) than what you measure "coming out of"
the USRP.
--
Patrick Yeon
ThinkRF
613-369-5104 x418
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