https://github.com/daniestevez/gr-guppi

GNU Radio out-of-tree module for handling GUPPI raw files
https://github.com/daniestevez/gr-guppi

gnuradio radio-astronomy radioastronomy seti

Last synced: about 1 month ago
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GNU Radio out-of-tree module for handling GUPPI raw files

• Host: GitHub
• URL: https://github.com/daniestevez/gr-guppi
• Owner: daniestevez
• License: gpl-3.0
• Created: 2022-07-29T14:43:39.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-08-25T19:10:17.000Z (over 2 years ago)
• Last Synced: 2024-10-15T21:35:58.720Z (3 months ago)
• Topics: gnuradio, radio-astronomy, radioastronomy, seti
• Language: CMake
• Homepage:
• Size: 170 KB
• Stars: 1
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# gr-guppi

GUPPI raw files are often used in radioastronomy/SETI to store the channelized

IQ samples output by a polyphase filterbank. This is the typical IQ (voltage

mode, in radioastronomy terms) output for many modern telescopes, since they use

a polyphase filterbank as part of their DSP, so raw ADC samples are often not

available.

gr-guppi contains a GUPPI File Sink block that can write GUPPI files. A GUPPI

File Source block able to read GUPPI files might be added in the future.

## Installation

gr-guppi requires GNU Radio 3.10. It can be built from source and installed as

any other GNU Radio out-of-tree module:

```

mkdir build

cd build

cmake ..

make

sudo make install

sudo ldconfig

```

## Example flowgraph

An example flowgraph showing how to build a polyphase filterbank that supplies

data to a GUPPI File Sink block is given in the `examples` folder. This

flowgraph generates a signal that consists of a chirp sweeping the central

channels plus AWGN, passes the signal through a polyphase filterbank such as the

one used in telescopes, and writes the results to a GUPPI file.

The output GUPPI file can then be processed by typical radioastronomy tools such

as [rawspec](https://github.com/UCBerkeleySETI/rawspec) and `watutil` from

[blimpy](https://github.com/UCBerkeleySETI/blimpy). After running the example

flowgraph for some time, run the following to view the spectrum and waterfall of

the GUPPI file.

```

rawspec -j -f 64 -t 100 guppi_sink_example

watutil -p ank guppi_sink_example.rawspec.0000.h5

```