sebastian
/
gr-satnogs
mirror of https://gitlab.com/LongHairedHacker/gr-satnogs.git
1
0
Fork 0
Code Issues Releases Wiki Activity
gr-satnogs/examples/README.md

25 lines
1.1 KiB
Markdown
Raw Normal View History

Add matched filter implementation for CW noise reduction * The matched filter makes use of VOLK * The examples directory contains a simple flowgraph that demonstrates the performance of the matched filter
2016-01-17 22:59:05 +01:00
# Examples
This directory contains a set of useful examples and flowgraphs
for testing and demonstrating the performance of the different components of this
OOT module
## Files
* `morse_ref.wav `: This is a reference file containing the `HELLO WORLD` message.
The file is sampled at 8 KHz and the audio frequency is 700 Hz. The Morse code
Words per Minute (WPM) is about 20.
## Flowgraphs
* `test_matched_filter.grc`: Demonstrates the performance of the implemented
Fix CW decoder issue The CW decoder was wrongly producing a Short Pause symbol instead of a dot symbol. With this fix the decoder can now reconstruct the initial text sequence sent. Also the CW matched filter now can directly produce the power of the filtered samples. This is very handy in order to get rid off an additional multiply block, saving vital resources especially for embedded platforms. For testing and demonstration purposes the morse_decoding_flowgraph can be used. The word sequence is the `HELLO WORLD`.
2016-02-01 21:04:27 +01:00
matched filter for CW decoding.
* `morse_decoding_flowgraph.grc`: This flowgraph decodes a CW signal and
prints the corresponding message at the `stdout`. To demonstrate the
capabilities of the decoder, signal and noise power GUI sliders are provided
Update the README description for the examples directory
2016-03-08 22:25:08 +01:00
for easy testing and experimenting.
* `ax25_example.grc`: This flowgraph semonstrates the AX.25 encoder and
decoder. It has two different AX.25 payload source blocks. The first one is the
`Debug Message Source` block that assigns as payload a predefined message,
whereas the second one is a `UDP Message Source` block that receives the
AX.25 payload from a UDP packet.
Fix CW decoder issue The CW decoder was wrongly producing a Short Pause symbol instead of a dot symbol. With this fix the decoder can now reconstruct the initial text sequence sent. Also the CW matched filter now can directly produce the power of the filtered samples. This is very handy in order to get rid off an additional multiply block, saving vital resources especially for embedded platforms. For testing and demonstration purposes the morse_decoding_flowgraph can be used. The word sequence is the `HELLO WORLD`.
2016-02-01 21:04:27 +01:00