Sequential decoding of convolutional codes

This repository contains a C library with Python wrappers for convolutional error-correcting codes. It currently implements the following:

• Sequential decoding
• Tail-biting or tail bits
• Two K=32 rate=1/2 convolutional codes (Johannesson & Ståhl 1999; Layland & Lushbaugh 1971 used in WSPR)

Note that decoding with default parameters is fairly slow, in general several seconds per 256-bit message with tail-biting codes. This library is meant for exploring weak-signal communications with low transmission rates.

For a documented example, please see test.py.