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Re: [Discuss-gnuradio] Question about calculating integration times
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] Question about calculating integration times |
Date: |
Sat, 10 Aug 2019 19:36:06 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 08/10/2019 03:40 PM, Ellie White wrote:
Hi all,
I hope you're doing well! Thanks again for your help with my questions
earlier this summer. I've got another thing to ask now; I am in the
process of configuring a system to record integrated spectra using the
attached flowgraph, and I am trying to determine how to integrate for,
say, 60 seconds -- if I want to do this, what should my decimation be,
and how do I calculate that? I have been able to approximate this by
trial and error, but I would like to know the calculation behind it.
Thanks in advance for any advice you can provide, much appreciated.
Have a good afternoon!
Cheers,
Ellie
It kind of depends on how you're doing integration.
An approach that strictly does sum/reduce/dump then you need as many
samples as would occur over your desired integration time.
For a single pole IIR filter, it's a bit trickier, and you'd set the
"Alpha" parameter to:
e^sqrt(sample-rate*integraton-time)
Which will approximate an R-C integrator with the given integration time.
- [Discuss-gnuradio] Question about calculating integration times, Ellie White, 2019/08/10
- Re: [Discuss-gnuradio] Question about calculating integration times,
Marcus D. Leech <=
- Re: [Discuss-gnuradio] Question about calculating integration times, Ellie White, 2019/08/10
- Re: [Discuss-gnuradio] Question about calculating integration times, Marcus D. Leech, 2019/08/10
- Re: [Discuss-gnuradio] Question about calculating integration times, Ellie White, 2019/08/10
- Re: [Discuss-gnuradio] Question about calculating integration times, Marcus D. Leech, 2019/08/11
- Re: [Discuss-gnuradio] Question about calculating integration times, Ellie White, 2019/08/11
- Re: [Discuss-gnuradio] Question about calculating integration times, Marcus D Leech, 2019/08/11
- Re: [Discuss-gnuradio] Question about calculating integration times, Marcus D. Leech, 2019/08/11
- Re: [Discuss-gnuradio] Question about calculating integration times, Ellie White, 2019/08/12
- Re: [Discuss-gnuradio] Question about calculating integration times, Marcus D. Leech, 2019/08/12