Hi Marcus,
here is the flow graph and the output signals with movement across the antennae and without.
http://tinypic.com/r/a5et5k/8 (GRC flow)
http://tinypic.com/r/nbeq0k/8 (without movement)
http://tinypic.com/r/2s7dnye/8 (with movement)
Thank you.
Dimitris.
On 26.03.2014 15:28, Marcus Müller wrote:
> Hi Dimitris,
>
> in theory, mixing should be exactly what you're doing - the
> multiplication of a signal with another one.
>
> Without you posting what your flow graph looks like or what the signal
> you get out of it actually is, helping you might be a bit hard...
> Please supply as much information as necessary to understand what
> might be going wrong ;)
>
>
> Greetings,
> Marcus
On 26.03.2014 15:18, Dimitris Siafarikas wrote:
>> Hi list, I am in the process of building an FMCW radar. For this to
>> work, I have to mix two signals. I tried to do it with the
>> "multiply" block but no luck. I tried then to see how exactly this
>> block works. It seems that it does not behave As it should be.
>> Referring to theory, I should see the sum and the difference of the
>> two signals. Looking at the FFT plot, I can't say that works.
>>
>>
>>
>> What am I doing wrong? Am I missing something?