PSK/QAM/APSK Modem - ComBlock Connectorized 3"x 3" module for ease of prototyping. Standard 40 pin 2mm dual row connectors (left, right, bottom). Single 5V supply with reverse voltage and overvoltage protection. 8 Point Phase Shift Keying - Bradley University 8 Point Phase Shift Keying . Fig 1 System Level Block Diagram of 8PSK. Fig 2 Sub-System Level Block Diagram of 8PSK . Fig 3 Signal Constellation of 8PSK. Data is mapped to cos(wc*t + p/4*n) where p = phase and n = 0:1:7 depending on the value of the bit masked. Fig 4 Simulink Block Diagram of 8PSK.