High Precision ISM Band Spectrum Recording with USRP N210

GNU Radio
1

Hi All,

I have a USRP N210 with RFX2400 2.3-2.9GHZ RX/TX. I want to view the ISM
Spectrum band from 2.40GHz - 2.48Ghz. Record it with a very high
precision.

I have the following doubts :

  1. Which port the antenna should be connected to get better accuracy ?
    TX/RX or RX. As said, I just want to record the activity the ISM band.

  2. I connected the antenna to the TX/RX port, configured the center
    frequency of the USRP at 2.44Ghz and a bandwidth of 80MHz. To view the
    complete spectrum activity with an antenna gain of 30db. Can usage of
    any
    post processing block after sampling lead to higher accuracy of the
    samples
    compared to storing the raw samples ?

Thanks and Regards,
Vaibhav

2

On 01/27/2015 06:15 AM, vaibhav kulkarni wrote:

  1. I connected the antenna to the TX/RX port, configured the center
    frequency of the USRP at 2.44Ghz and a bandwidth of 80MHz. To view the
    complete spectrum activity with an antenna gain of 30db. Can usage of
    any post processing block after sampling lead to higher accuracy of
    the samples compared to storing the raw samples ?

Thanks and Regards,
Vaibhav
Either port will produce nearly-identical results.

The maximum sample-rate of the N210 is 25Msps. You’ll have to piece
together four chunks of spectrum to cover your desired 80MHz.

Also, what is it that you mean by “accuracy” in this case? Faithful
reproduction of the amplitudes as seen at the antenna port? Faithful
reproduction of the signals as sent by the transmitter?