Re: [Discuss-gnuradio] ssb - question

[Ron Economos]

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

ssbflow.png
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