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Let PCS_p^N denote a set of p binary sequences of length N such that the sumof their periodic auto-correlation functions is a delta-function. In the 1990,Boemer and Antweiler addressed the problem of constructing such sequences. Theypresented a table covering the range p <= 12, N <= 50 and showing in whichcases it was known at that time whether such sequences exist, do not exist, orthe question of existence is undecided. The number of undecided cases wasrather large.  Subsequently the number of undecided cases was reduced to 26 by the author.In the present note, several cyclic difference families are constructed andused to obtain new sets of periodic binary sequences. Thereby the originalproblem of Boemer and Antweiler is completely solved.

Periodic complementary sets of binary sequences