STUDY G3 STUDY AND REVIEW OF DATA ENCODING DATA COMMUNICATION - DR. GORGONE

What is the difference between digital and analog data and digital and analog signals?

Define modulation.

List the modulation encoding techniques in order from the least affected to the most affected by noise.

There are four possible combinations of encoding and modulation techniques that are in widespread use (digital data, digital signal; analog data, digital signal; digital data, analog signal; and analog data, analog signal). The reasons for choosing a particular combination for any given communication task vary. What are some representative reasons for each of the combinations?

Define the following terms: signal element, data signaling rate or data rate, duration, baud, BPS, mark and space.

What factors determine how successful the receiver will be in interpreting the incoming signal?

What is encoding and why is it used?

What are the five common categories of encoding schemes used in the transmitting of digital data using digital signals?

Why is the biphase digital signal encoding technique important?

What are the three basic encoding or modulation techniques for transmitting digital data using analog signals (digital data, analog signals)?

Explain ASK, FSK and PSK.

Explain the common encoding technique known as quadrature phase-shift keying (QPSK).

Explain how a standard 9600 BPS modem uses combination modulation techniques (differential phase shift keying and amplitude modulation) to the 9600 BPS data rate over a 2400 baud voice line?

Define digitization.

Describe the three most common things that can happen to analog data once it has been converted into digital data (signals).

Describe and explain PAM and PCM modulation techniques.

How is voice digitized?

What are the principal reasons why we are seeing digital encoding techniques continue to grow in popularity for transmitting analog data?