Analog and Digital Communications¶

NTC Syllabus — Paper II, Section (A), Topic 5: Analog and Digital Communications

Difference between analog and digital communications, Basic communications elements, Signal and noise in communication system, AM, DSC-SC, SSB-SC, PM, FM, Superheterodyne AM and FM receiver, Digital to analog and analog to digital conversion, Sampling theorem, Sample & hold Circuit, A law, M-law, Quantizer, Coding: NRZ/HDB3/AMI, Error detection and correction, PCM/ADPCM, Digital Modulation: ASK/PSK/FSK /QPSK /MSK / QAM, Modulation and demodulation circuits, Frequency converter and Mixers, Phase locked loop.