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[Discuss-gnuradio] Noise floor and Rx Gain
From: |
Yong J. Chang |
Subject: |
[Discuss-gnuradio] Noise floor and Rx Gain |
Date: |
Sat, 23 Jan 2010 09:48:02 -0800 (PST) |
All,
I'm trying to set all USRP and RFX2400 parameters comparable with Micaz in
the context of receiver sensitivity. But I've observed a non-linear behavior
of ADC.
By using usrp_fft.py, we can see noise floor level. When I change a rx-gain
in a range of 0~45dB, noise floor level does not change. However, in a range
of 45~90dB, noise floor linearly increases according to rx-gain. Does this
affect receiver sensitivity? My thought is that high-gain of ADC introduces
additional noise figure. Please give me a clue. Thanks in advance.
--
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- [Discuss-gnuradio] Noise floor and Rx Gain,
Yong J. Chang <=