DATA COMMUNICATION SYSTEM

3. Understand Digital Communication( Chapter 3) Systems

3.1 Define digital modulation.

3.2 Describe Digital communication system with block diagram.

3.3 Define Line Coding and Block Coding.

3.4 Mention the Line Coding Schemes.

3.5 State unipolar Linecoding with timing diagram.

3.6 Describe NRZ-I Line Coding scheme using 4B/5B Block Coding.

3.7 Describe different types of polar encoding with necessary timing diagram.

3.1 Define digital modulation.

DM stands for Digital Modulation and is a generic name for modulation techniques that uses discrete signals to modulate a carrier wave. In comparison, FM and AM are analog techniques. The three main types of digital modulation are Frequency Shift Keying (FSK), Phase Shift Keying (PSK) and Amplitude Shift Keying (ASK).