[USRP-users] AM modulated signal using USRP2

Marcus Müller marcus.mueller at ettus.com
Fri Feb 1 05:07:52 EST 2019

Hi Afaq,

assuming you already know the math behind AM, this is really simple:
What you need to transmit is a modulated carrier. So, you just send the
audio signal with a DC offset to your USRP and let the USRP tune to the
frequency you want to use.

Easiest way would probably just installing GNU Radio and having flow

source of the data signal
-> add constant (so that all values are positive)
-> multiply const (so that all values are |·| < 1)
-> USRP Sink

Note that in general it's really a bad idea to do amplitude modulation
in the 2.4 GHz, because of fading.

Best regards,

On Thu, 2019-01-31 at 21:03 +0100, Afaq Ahmed via USRP-users wrote:
> Hello fellows,
> I want to create an AM Modulator using USRP2. The setup is such that
> I want to use one USRP2 as AM Modulator (Transmitter) and another
> USRP2 to be the AM Demodulator (Receiver). Can you please point in
> the right direction ? May be some suggestions on how I can
> achieve this would be very nice?
> OS: Xubuntu 18.04 LTS
> PC: RAM 4 GB, Core i3
> USRP2 with XCVR2450 daughterboard
> Thanks a lot
> BR
> Afaq
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> USRP-users at lists.ettus.com
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