Exam 8: Digital Modulation and Demodulation

What is one advantage provided by a phase-shift keying (PSK)system?

Impedance is an AC quantity is composed of both resistance and ______________.

Which of the following filters has the important property that its impulse response rings at the symbol rate,which means that it is capable of minimizing ISI?

Excessive _______ means that a receiver cannot differentiate one symbol from another.

The _____________ gives a visual indication of system linearity and noise performance.

Where is minimum-shift keying (MSK)widely used?

What type of receiver detects the phase shift in the received signal?

When a carrier is conveying intelligence by simply turning it on or off according to a prearranged code,this type of transmission is called ____________.

Which of the following is a key characteristic of orthogonal frequency-division multiplexing?

Which of the following is the basis for cellular systems employing the code-division multiple access (CDMA)standard?

The two forms of spread spectrum are frequency hopping and ______________.

The power of DSSS systems is largely in the spreading and dispreading of the received signal because it gives rise to a phenomenon known as ______________.

The advantage of a differential phase-shift keying (DPSK)system is that_____________ is (are)not required.

What type of coding is used to minimize data errors in the data transmission process?

What type of transmissions represented the first type of digital communications?

The ________ demodulator reverses the process of modulation,thereby recovering the original binary data signal.

Why must modulated signals be demodulated?

Why are signals that are in quadrature said to be orthogonal?

Which of the following achieves high spectral efficiencies because the spacing of each carrier is as close as theoretically possible?

What law allows us to predict the minimum bandwidth required for information transfer in a given time interval?