2PSK
2PSK, commonly known as binary phase-shift keying (BPSK), is a binary phase modulation scheme used in digital communications. It encodes one bit per symbol by selecting one of two carrier phases separated by 180 degrees. The constellation consists of two points on the unit circle, opposite each other; the two phases are typically 0 and π radians. As a member of the PSK family, 2PSK features a constant envelope, offering robustness to amplitude variations and simplicity for coherent receivers.
The transmitted signal is typically represented in the passband as s(t) = sqrt(2P) cos(ωc t + θk), where
Performance in additive white Gaussian noise shows a symbol error rate and bit error rate characterized by