  A code is said to be two-weight if the non-zero codewords have only two
different a weight w1 and w2. Two-weight codes are closely related to strongly
regular graphs. In this paper. It is shown that a consta-cyclic code of
composite length can be put in the quasi-twisted form. Based on this
transformation, a new construction method of quasi-twisted (QT) two-weight
codes is presented. A large amount of QT two-weight codes are found, and some
new codes are also constructed.
