Which of the following is not a property of MSK?

The correct answer is: B. Variable envelope.

MSK (Minimum Shift Keying) is a digital modulation scheme that uses a continuous phase modulation (CPM) waveform. It is a type of frequency-shift keying (FSK) modulation, where the frequency of the carrier signal is shifted between two values, depending on the binary data being transmitted.

MSK has several advantages over other modulation schemes, including:

• Good spectral efficiency: MSK has a relatively narrow bandwidth, which makes it efficient in terms of the amount of spectrum it occupies.
• Good BER performance: MSK has a low bit error rate (BER), which means that it is a reliable modulation scheme.
• Self-synchronizing capability: MSK has the ability to resynchronize itself if the received signal is corrupted by noise or interference.

However, MSK also has one disadvantage:

• Variable envelope: The envelope of the MSK signal is not constant, but varies with the binary data being transmitted. This can cause problems in some applications, such as when the MSK signal is transmitted over a power-limited channel.

In conclusion, the correct answer to the question “Which of the following is not a property of MSK?” is B. Variable envelope.