5EC4 ANALOG COMMUNICATION
  Units    Contents of the subjects
I
NOISE EFFECTS IN COMMUNICATION SYSTEMS: -Resistor noise, Networks with reactive elements, Noise temperature, Noise bandwidth, effective input noise temperature, Noise figure. Noise figure & equivalent noise temperature in cascaded circuits.
II

AMPLITUDE MODULATION:- Frequency translation, Recovery of base band signal, Spectrum & power relations in AM systems. Methods of generation & demodulation of AM-DSB, AM-DSB/SC and AM-SSB signals. Modulation & detector circuits for AM systems. AM transmitters & receivers.
III
FREQUENCY MODULATION: -Phase & freq. modulation & their relationship, Spectrum & band width of a sinusoidally modulated FM signal, phasor diagram, Narrow band & wide band FM. Generation & demodulation of FM signals. FM transmitters & receivers.. Comparison of AM, FM & PM. Pre emphasis & deemphasis. Threshold in FM, PLL demodulator.
IV
NOISE IN AM AND FM:-Calculation of signal-to-noise ratio in SSB-SC, DSBSC, DSB with carrier, Noise calculation of square law demodulator & envelope detector. Calculation of S/N ratio in FM demodulators, Super heterodyne receivers.
V
PULSE ANALOG MODULATION:-Practical aspects of sampling: Natural and flat top sampling. PAM, PWM, PPM modulation and demodulation methods, PAM-TDM.
Text/References:
• Modern Digital & Analog Communication Systems, Lathi, Oxford
• Analog Communication, Chandrasekhar, Oxford
• An Introduction To Analog & Digital Communications-, Haykins, Wiley
• Digital And Analog Communication Systems-, Shanmugam, Wiley
• Communications Systems, 4ed-, Haykins, Wiley
• Principles Of Communication Systems, Herbert Taub, Donald Schilling, Goutam Saha-,
TMH
• Communication Systems, R Singh, S. Sapre, TMH
• Analog Communication, K. N. Hari Bhat, Pearson
• Digital & Analog Communication Systems, Leon W. Couch, Pearson