If k is the number of bits per symbol in the modulation sche

If k is the number of bits per symbol in the modulation scheme, Identify which modulation scheme is bandwidth-efficient and which one power-efficient? Explain. If the modulation schemes for the given error curves are M-PSK and M-FSK, identify which curve belongs to which modulation scheme. Justify your selection.

Solution

a) The modulation technique in the first diagram is Bandwidth Efficient and the modulation technique used in the second diagram is power efficient.

b) The first diagram indicates M-PSK modulation and the second diagram is a M-FSK modulation.

Increasing M increases BW efficiency and also increases Bit Error Ratio for MPSK. Power-Decrease by log2(M/2).

Increasing M decreases BW efficiency and also decreases Bit Error Ratio.