Infinite families of quasiperfect and doubly quasiperfect binary arrays

A quasiperfect (doubly quasiperfect) binary array B is an s*t array with all entries plus or minus one, such that all periodic autocorrelation coefficients of the array are zero, except for shifts (u,v) where u identical to 0 mod s and v identical to 0 mod t. The authors construct a new infinite families of quasiperfect and of doubly quasiperfect binary arrays.