Our approach exploits the autocorrelation properties of the CW signal.
Thus low, high or band pass filtering greatly affects the performance of
the algorithm, because they introduce autocorrelation.
The AGC block in the Morse decoding flowgraph is placed now at the
proper position. The output of the matched filter produces now a clear
and distinguishable signal during the presence of a pulse. This makes
the work for the signal to symbol decoder more easy.
Depending the received symbol the tree is traversed towards the leafs.
At each step the corresponding decode-able character is appended at a
string buffer.
TODOs:
* Add logic in the decoder to retrieve the decoded words from the tree
* Create a debug source block
The morse decoder is not yet functional. The decoding is performed
using a binary tree. Left child, corresponds to a received dot whereas
right to a received dash.
Manolis Surligas
Manolis Surligas