A Rate $R=5/20$ Hypergraph-Based Woven Convolutional Code With Free Distance $120$

A rate R=5/20 hypergraph-based woven convolutional code with overall constraint length 67 and constituent convolutional codes is presented. It is based on a 3-partite, 3-uniform, 4-regular hypergraph and contains rate R
^c
=3/4 constituent convolutional codes with overall constraint length 5. Although the code construction is based on low-complexity codes, the free distance of this construction, computed with the BEAST algorithm, is d
_free
=120, which is remarkably large.