ANALOG AND DIGITAL COMMUNICATION SYSTEMS

UNIT 1 Time domain equation for AM ? Calculate  its band width and draw frequency spectrum for AM ? Give efficiency in AM ? Derive  Relation between Pt and Pc ? Time domain equation for FM ? Merits of FM over AM ? What are different types of suppressed carriers , Need for suppressed carriers ? Explain DSB-SC, SSB-SC with neat block diagram ? give any 3 applications ,advantages ,dis-advantages ? Define noise , S/N ratio, N.F, N.T , classification of noise , effects of noise in communication ? (a) Define pre-emphasis and de-emphasis and explain with neat circuit diagram ?  Advantages of pre-emphasis and de-emphasis UNIT 2 Draw and explain the block diagram of PCM coding and decoding ? Explain sampling theorem & conversion of analog signal  to digital signal ?  Explain PAM,PPM, PWM with block diagram and wave forms ? Compare PAM,PPM,PWM ? Define sampling ,quantization ,encoding ? UNIT 3 Explain synchronous and asynchronous transmission techniques ? Need fo...