Some rate-p/(p+1)quasi-cyclic codes (Corresp.)

Some optimal rate-
\frac{1}{2}
quasi-cyclic codes found by Chert et aL [3] are grouped into a small set of equivalence classes with the assistance of a computer. The weight distribution of a selection of these rate-
\frac{1}{2}
codes is tabulated. In addition, a list of new optimal rate-
\frac{2}{3}
quasi-cyclic codes of lengths up to 54 is presented.