Syllabus Principles of Communication Systems - (204193) Credit Examination Scheme : 03 End - Sem (Theory) : 70 Marks Unit III FM Transmission & Reception for Single Tone Phase Modulation (PM) and Frequency Modulation (FM), Relationship between Phase and Frequency Modulation, Modulation Index, Spectrum of FM (single tone) : Feature of Bessel Coefficient, Power of FM signal, Bandwidth of tone modulated FM signal, modulation index : AM vs. FM, Spectrum of constant Bandwidth FM, Narrowband and Wideband FM. FM Modulators and Demodulators : FM generation by Armstrong’s Indirect method, frequency multiplication and application to FM, FM demodulator. (Chapter - 3) Unit IV Pulse Modulation Need of analog to digital conversion, sampling theorem for low pass signal in time domain, and Nyquist criteria, Types of sampling - natural and flat top. Pulse amplitude modulation & concept of TDM : Channel bandwidth for PAM, equalization, Signal Recovery through holding. Pulse Width Modulation (PWM) and Pulse Position Modulation (PPM) : Generation & Detection. (Chapter - 4) Unit V Digital Representation of Analog Signals Quantization of Signals : Quantization error, Uniform & Non-Uniform types of Quantization, Mid-rise & Mid-tread Quantizer. Companding : A-law & -law. Pulse Code Modulation system : Generation & Reconstruction, Differential Pulse code modulation, Delta Modulation, Adaptive Delta Modulation. (Chapter - 5) Unit VI Baseband Digital Transmission Line codes : Properties and spectrum. Digital Multiplexing and hierarchies : T1, AT&T, E1, CCITT, Scrambling & Unscrambling. Synchronization : Carrier Synchronization, Bit Synchronization and Frame Synchronization. Intersymbol Interference, Equalization. (Chapter - 6)
