PAT and PX code Pulse compression

Px and PAT codes are classes of polyphase codes of perfect square length derived
for improving previous polyphase codes performance. Px code is a modified class
of frank code having a dc frequency in the middle of the pulse rather than the
beginning in frank code. The PAT code is a new model of polyphase sequences of square length N = L^2. PAT code was presented by Petrolati D, Angeletti P, Toso G (2012).