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Re: [Discuss-gnuradio] Generating chrip signals
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Generating chrip signals |
Date: |
Wed, 19 Apr 2006 09:33:18 -0700 |
User-agent: |
Mutt/1.5.9i |
On Wed, Apr 19, 2006 at 03:44:27AM -0700, seph 004 wrote:
> Hi
>
> At the moment I would like to see if I can generate a chirp
> signal. Looking through what gnuradio blocks are available, I
> assumed I could use the gr_fxpt_nco block to do something like
> this. I was wondering firstly if it would be possible, and
> secondly, how this block works and behaves when it's running.
>
> Regards
> Lance
gr_fxpt_nco doesn't derive from gr_block. It's a low level primitive
used within blocks.
However, you could generate a chirp by feeding
gr.frequency_modulator_fc (basically a VCO) a periodic ramp.
You could generate a periodic ramp using gr.vector_source_f(foo, True)
where foo was a python sequence that defines the ramp.
You could of course also build a new block that derives from
gr_sync_block.
Eric