Difference between MSK and CPSK

1. What is PSK in digital communication?
2. What is minimum shift keying in digital communication?
3. Which spectrum rolls off at a rate proportional to the inverse fourth power of frequency?
4. What is BPSK in digital communication?

What is PSK in digital communication?

Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave). The modulation is accomplished by varying the sine and cosine inputs at a precise time.

What is minimum shift keying in digital communication?

Minimum shift keying (MSK), which is a special form of continuous-phase frequency-shift keying, with the detection in the receiver being performed in two successive bit intervals.

Which spectrum rolls off at a rate proportional to the inverse fourth power of frequency?

The MSK spectrum rolls off at a rate proportional to the inverse fourth power of frequency, whereas in the case of the QPSK signal, the spectrum falls off as the inverse square of the frequency.

What is BPSK in digital communication?

Binary Phase-shift keying (BPSK) is a digital modulation scheme that conveys data by changing, or modulating, two different phases of a reference signal (the carrier wave).