Abstract: A new periodic correlation signal is proposed, APPBAP (Almost Perfect Punctured Binary Array Pair). The definitions of APPBAP and its transformation properties are presented. To reduce the searching range and improve the searching efficiency of almost perfect punctured binary array pair, limited conditions of APPBAP are discussed. Based on these limited conditions, many almost perfect punctured binary array pairs with small length no more than 22 are searched. The searching results show that almost perfect punctured binary array pairs have such high energy efficiency that they are feasible for engineering applications as synchronization codes and multi-user codes.

Key words: array pair, correlation, information theory, perfect signal