[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: How can I split a periodic signal?
From: |
Johannes Demel |
Subject: |
Re: How can I split a periodic signal? |
Date: |
Fri, 26 Aug 2022 13:09:32 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 |
Hi all,
since Audacity is targeted at audio samples, it might be interesting to
have a tool that is more targeted at IQ samples.
I've heard/read about quite a few people who use "inspectrum":
https://github.com/miek/inspectrum
(I hope this is the correct repo.)
A somewhat older tool might be "baudline":
https://www.baudline.com/
(I used it in the past but I'd probably switch to inspectrum nowadays).
Cheers
Johannes
On 25.08.22 20:33, Mike Markowski wrote:
James,
I find an easy approach is to write the signal out as alternating i/q
binary if it's not already. That can be read into audacity as stereo
(File -> Import -> Raw), edited and written back out as raw data without
header (File -> Export -> Export Multiple, and choose Raw Headerless).
Don't worry about audacity's sample rate because you're editing raw i/q
anyway. This allows editing down to the sample level.
Good luck!
Mike ab3ap
On 8/25/22 1:52 PM, James Wanga wrote:
I'm receiving a phase modulated signal representing a periodic pulsed
byte that looks something like this:
-------------|-|||--||-------------|||--||||-------------|--||||-|-------------
I'm trying to understand how I might split this signal roughly halfway
between each pulse of activity so I can save each pulse as a separate
IQ fil, bit like this:
------|-|||--||------
-------|||--||||-------
------|--||||-|------
The split does not have to be precise, it only needs to avoid
bisecting any of the pulses. Here are some things I've tried.-
Creating a custom block on the receiver that uses a timing interval.
Unfortunately, the pulses aren't perfectly periodic so eventually this
causes the split to drift.[...]
smime.p7s
Description: S/MIME Cryptographic Signature