4IT6.1-ANALOG & DIGITAL COMMUNICATION |
Units: I |
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.
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Units: II |
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. |
Units: III |
PCM & DELTA MODULATION SYSTEMS : Uniform and Non-uniform
quantization. PCM and delta modulation, Signal to quantization noise ratio in PCM
and delta modulation. DPCM, ADM, T1 Carrier System, Matched filter detection.
Error probability in PCM system.
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Units: IV |
BASE BAND TRANSMISSION: Line coding(RZ,NRZ): Polar, Bipolar,
Manchester, AMI. Inter symbol interference, Pulse shaping, Nyquist criterion,
Raised cosine spectrum.
PULSE ANALOG MODULATION: Practical aspects of sampling: Natural and flat
top sampling. PAM, PWM, PPM modulation and demodulation methods, PAMTDM.
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Units: V |
DIGITAL MODULATION TECHNIQUES : Geometric interpretation of signals,
Orthogonalization. ASK, BPSK, BFSK, QPSK, MSK modulation techniques and
Coherent detection of these techniques. Calculation of error probabilities.
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