History

Manolis Surligas defb1378b8 Add a flowgraph example for the receiving rigctl commands		2016-04-11 20:24:17 +03:00
..
.gitignore	Add matched filter implementation for CW noise reduction	2016-01-17 23:59:05 +02:00
Goliat_Morse_8k.wav	Improve the Morse decoder block	2016-02-28 00:45:41 +02:00
README.md	Add a flowgraph example for the receiving rigctl commands	2016-04-11 20:24:17 +03:00
ax25_example.grc	Finish the AX.25 decoder and add a UDP message source block	2016-03-08 23:19:17 +02:00
morse_decoding_flowgraph.grc	Improve the Morse decoder block	2016-02-28 00:45:41 +02:00
morse_decoding_goliat.grc	Add frame encoder block	2016-03-28 18:24:50 +03:00
morse_ref.wav	Fix CW decoder issue	2016-02-01 22:04:27 +02:00
test_matched_filter.grc	Improved Morse decoding	2016-01-30 21:37:36 +02:00
test_morse_decoder.grc	Improve the Morse decoder block	2016-02-28 00:45:41 +02:00
test_rigctl.grc	Add a flowgraph example for the receiving rigctl commands	2016-04-11 20:24:17 +03:00

README.md

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 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 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.
test_rigctl.grc: This particular flowgraph demonstrates the capabilities of the module implementing a portion of the rigctld functionality. It received rigctl commands through a TCP socket and produces the appropriate messages. In the example these messages are received from the Doppler correction block. To generate rigctl commands you can use the GPredict software. Note that you have to specify the frequency of the transmitter satellite. As this block does not use any satellite signal rather than a simple sine, you do not expect any correction at all. However you will be able to see how smoothly the sine peak is drifting. This drift in normal situations will be the correction offset.