Re: [Discuss-gnuradio] regarding calculating the noise power
On Wed, Jul 6, 2011 at 4:44 PM, shantharam balasubramanian
shantharam...@gmail.com wrote:
Also I have been working in a modified program of benchmark_rx for
this case. It would be more helpful if someone helps me to reduce it
or to measure it, so that I will be able to explain to the people who
will ask me about the spike.
Yes, you will see a DC offset in these receivers. You can think of removing
it as subtracting off the time averaged value of the signal. I think a
better solution, though, is the block gr_dc_blocker_{cc,ff} that I recently
added to the project. It's a narrow notch filter at DC.
Tom
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[Discuss-gnuradio] regarding calculating the noise power
Hi. I am using USRP2 testbed. I have been recently working on plotting the PSD of the received signal and I was able to do it. The graph plots the signal in baseband frequency level. Then I turned on the receiver node while keeping the sender node off. When I plotted the PSD graph for that, I was expecting to see a PSD which should be more or less constant over all the frequencies. But I saw a peak in the 0 Hz which is the center frequency. I was told that this is due to DC offset. I am not sure what is meant by that exactly and how to control or measure the DC offset in the output I got. Can anyone help me out? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] regarding calculating the noise power
Also I have been working in a modified program of benchmark_rx for this case. It would be more helpful if someone helps me to reduce it or to measure it, so that I will be able to explain to the people who will ask me about the spike. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
