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Re: [Discuss-gnuradio] rssi questions
From: |
Brian Padalino |
Subject: |
Re: [Discuss-gnuradio] rssi questions |
Date: |
Tue, 7 Aug 2007 17:10:28 -0400 |
On 8/7/07, Zhuocheng Yang <address@hidden> wrote:
> Hi guys:
>
> I noticed that in the adc_interface, there are registers called rssi_0,
> rssi_1, rssi_2, and rssi_3. All of which are 32 bits. However, according to
> the header format:
> http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/doc/inband-signaling-usb
> The rssi should be 6 bits. Do I just use the lower 6 bits?
According to the instantiation:
http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib/adc_interface.v#L43
The lower 16 bits has the RSSI value, and the upper 16 bits has the
over-count value.
If you were to just use 6 bits of the RSSI value, I'd recommend the
MSBs and not the LSBs.
Is this really the RSSI - or should the RSSI actually be a function of
the amount of gain or attenuation in the RF stages? I am sure it gets
pretty difficult calculating an estimate for the amount of power at
the antenna.
Should this value be an expression in dB of the received power?
Brian
- [Discuss-gnuradio] rssi questions, Zhuocheng Yang, 2007/08/07
- Re: [Discuss-gnuradio] rssi questions,
Brian Padalino <=
- Re: [Discuss-gnuradio] rssi questions, Johnathan Corgan, 2007/08/07
- Re: [Discuss-gnuradio] rssi questions, Brian Padalino, 2007/08/07
- Re: [Discuss-gnuradio] rssi questions, Johnathan Corgan, 2007/08/07
- Re: [Discuss-gnuradio] rssi questions, George Nychis, 2007/08/07
- Re: [Discuss-gnuradio] rssi questions, Johnathan Corgan, 2007/08/08
- Re: [Discuss-gnuradio] rssi questions, Matt Ettus, 2007/08/09
- Re: [Discuss-gnuradio] rssi questions, George Nychis, 2007/08/16
- Re: [Discuss-gnuradio] rssi questions, Eric Blossom, 2007/08/16
- Re: [Discuss-gnuradio] rssi questions, Marcus Leech, 2007/08/16
- Re: [Discuss-gnuradio] rssi questions, Johnathan Corgan, 2007/08/16