Nonisomorphic complete sets of F-rectangles with prime power dimensions

A technique for constructing nonisomorphic complete sets of frequency rectangles with prime power dimensions is described. This procedure is used to establish a conservative general lower bound for the number of possible nonisomorphic complete sets of frequency rectangles of prime power order. Several cases are considered in detail which improve the lower bound for those orders. The technique can also be applied to the construction of inequivalent orthogonal arrays of strength 2.