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Re: [Discuss-gnuradio] Audio File transmission using Qpsk modulation
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From: |
CEL |
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Subject: |
Re: [Discuss-gnuradio] Audio File transmission using Qpsk modulation |
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Date: |
Sat, 12 May 2018 10:10:57 +0000 |
No, 15 kHz is not "very minimum", it's impossible. Your console will
contain information that the UHD picked a different, higher, sampling
rate.
Your "I picked 15 kS/s to get a clear audio file" doesn't make much
sense; this is not how digital communications work!
I'm afraid you'll have to be way more careful when designing an RF
transceiver. Maybe you'd want to read up on complex baseband,
constellations, pulse shaping, symbol synchronization and resamplers,
so that you understand what's happening in your flow graph.
Best regards,
Marcus
On Thu, 2018-05-10 at 17:29 -0400, JONNY LEYIKUN wrote:
> HI Jeff Long
>
> Yaah 15K is very minimum to use in USRP sink
> I use 15K sample rate in order to get clear Audio File. but I also
> use large sample rate in USRP sink but the result is more or less the
> same
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