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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] Analog and Digital Transmission in parallel |
Date: | Mon, 13 Jun 2016 14:48:44 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 |
Hi Przemek, yes, generating multiple different waveforms at once should be possible – after all, the USRP really doesn't care about what it's transmitting. To me this sounds like you're taking the 2.5MHz bandwidth that
the USRP has at 2.5MS/s, and divide it into channels – one for
each of different modulations. Is that understanding correct? A note: a wav source doesn't really have a sampling rate.
It really just gives you the samples from the wav file, as
sequence of numbers. The fact that some header in the wav file
says "this has a sampling rate of 16kS/s" doesn't change anything
about that sequence of numbers. Your DSP application's job is to
generate a digital signal that makes sense out of that – which
means you'll need operations that have an interpolating
characteristic – i.e. for one sample going into that operation,
>1 come out. GNU Radio, however, really doesn't care or even
know about the sampling rates – all operations are done on the
sequence of numbers that your sample stream is, and frequencies
are only meaningful as fraction of the sampling rate. Best regards, Marcus On 12.06.2016 16:11, Przemek
Lewandowski wrote:
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