Phase shift keying modulation and demodulation methods and devices

A phase shift keying modulation method, the method comprising:

• mapping a binary data stream to be modulated into a phase sequence, the phase sequence including one or more phase symbols according to a mapping relationship between the binary data stream and the phase sequence in a predetermined phase shift keying modulation mode;
• modulating the phase symbols with a preset phase function to obtain a phase signal that changes continuously with time, wherein in each symbol cycle, a difference between a value of the phase signal at a beginning of the symbol cycle and a value of the phase signal at an end of the symbol cycle is equal to the phase symbols modulated in the symbol cycle;
• and
• obtaining a radio frequency signal by modulation based on the phase signal.

A phase shift keying modulator method, the method comprising:

• mapping a binary data stream {bn} into a phase sequence {θk}, the phase sequence {θk} including one or more phase symbols;
• modulating the phase symbols in the phase sequence into a continuous phase signal φ(t) through a phase function according to:
• ϕ(t)=Σk=0K−1θk*p(t−k*T);
• and
• obtaining a radio frequency signal based on the continuous phase signal;
• wherein n=0, 1, 2, 3, . . . N−1, k=0, 1, 2, . . . , K−1, N and K are positive integers, p(t) is the phase function, and p(t≤0)=0, p(t≥T)=1, a value of p(0≤t≤T) changes continuously between 0 and 1, t is time variable, and T is a symbol cycle.