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From: | Przemek Lewandowski |
Subject: | Re: [Discuss-gnuradio] ssb - question |
Date: | Sat, 12 Sep 2015 15:50:47 +0200 |
There is an easier way. A DSB modulator and bandpass filter. You can download a tested flow graph here:
http://www.w6rz.net/ssb.grc
and the test audio file:
http://www.w6rz.net/ssbaudio.wav
The flow graph is set up for LSB. For USB, just swap the Band Pass Filter block with the one that's disabled.
The 10 kHz signal source and multiply blocks are optional. I use this to move the TX signal away from the DC offset spike of my receiver.
Original flow graph is here:
https://github.com/argilo/sdr-examples
https://github.com/argilo/sdr-examples/blob/master/multi_tx.grc
Ron
On 09/08/2015 05:48 AM, Przemek Lewandowski wrote:
Hi everybody
Im trying to make SSB modulation with Hilbert transform. And Im using IQ modulator
here is schema:
http://postimg.org/image/gms5srret/
And I have a question. In Frequency domain there should be one peak, and on on my plot there is one - that is good, and second that is smaller/suppressed.
Is something wrong ?? or is it normal ??
Is Hilbert method for creating SSB signal is good ?? or can it be made easier ???
thank you very much.
Przemek Lewandowski
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