DIG 6206 Lecture 6

The _____ refers to the number of signal changes or symbols transmitted per second in a communication channel

• Data rate

• Baud rate

• Throughput

If the baud rate is higher than the data rate, it indicates that more than one bit is transmitted per symbol.

• True

• False

The carrier frequency is the modulated frequency that has been altered by changing its amplitude, phase, or frequency.

• True

• False

QPSK uses two carrier frequencies to modulate the signal by varying the in-phase (I) and quadrature (Q) components.

• True

• False

A constellation diagram represents the signal modulation of _____.

• ASK

• FSK

• PSK

• None

Which modulation scheme does the figure represents?

• 8 PSK

• 8 QAM

• 16 QAM

Unlike MFSK, which uses multiple carrier frequencies, M-ASK achieves its higher data rates by increasing the number of amplitude levels used with a single carrier signal.

• True

• False