1) Unlike analog communications, digital communications do not involve the use of sinusoidal carriers during the digital modulation process.

True

False

2) Select the true statement regarding the relationship between data rate (bit rate) and baud rate.

		a. data rate is the same as baud rate
		b. data rate is not dependent upon M (i.e., number of values that a symbol can take on)
		c. data rate can be equal to or greater than baud rate depending upon the value of M
		d. data rate is always less than baud rate

3) Analog information can be converted into digital data using techniques such as PCM (pulse code modulation). Select the correct statement(s).

		a. in order to convert an analog signal that consists of an infinite number of values, it must be sampled using the Nyquist sampling theorem
		b. digitized analog signals always experience quantization loss
		c. signal aliasing is experienced when sampling falls under the recommended Nyquist sampling rate
		d. all of the above are correct

4) QPSK is the same as QAM. Both can be used interchangeably.

True

False