Just like it says on the tin, it’s phase shift keying, and a proper implementation uses a phase detection circuit or something similar. [Craig] thought it would be fun to build an analog BPSK31 ...

Figure 2(a) depicts simultaneous amplitude, frequency, and phase-shift keying. Figure 2(b) represents quadrature PSK (QPSK).

A-BPSK aviation binary phase shift keying—a form of phase-shift keyed modulation with shaped filters especially adapted to perform in an RF environment subject to fading A-QPSK aeronautical ...

A variant of phase-shift keying, created by Magellan Technology, which operates at 13.56 MHz and complies with the ISO/IEC 18000 3 Mode 2 standard. PJM technology enables a write data rate of up to ...