EC 9253 COMMUNICATION SYSTEMS L T P C
3 0 0 3
UNIT I ANALOG MODULATION 9
Amplitude Modulation – AM, DSBSC, SSBSC, VSB – Angle modulation – PM and
FM –Modulators and Demodulators – Fourier Transform of modulated signals.
UNIT II RECEIVER CHARACTERISTICS 9
Noise sources and types – Noise figure and noise temperature – Noise in cascaded
systems – Single tuned receivers - Superheterodyne receivers
UNIT III BASEBAND TECHNIQUES 9
Review of low pass sampling – Quadrature sampling of Bandpass signals –
Quantisation – Uniform and non-uniform quantisation – Quantisation noise –
Companding laws of speech signals – PCM, DPCM, DM, ADPCM and ADM
Multiplexing – TDM (E and T lines), FDM
UNIT IV BANDPASS SIGNALING 9
Geometric representation of signals – Correlator and matched filter – ML detection –
generation and detection, PSD, BER of coherent BPSK, BFSK, QPSK – Principles of
QAM – Structure of non-coherent receivers – BFSK, DPSK.
UNIT V NOISE PERFORMANCE 9
Narrow band noise – PSD of in-phase and quadrature noise – Noise performance in
AM systems – Noise performance in FM systems – Pre-emphasis and de-emphasis
– Capture effect, threshold effect.
TOTAL: 45 PERIODS
TEXT BOOKS
1. J.G.Proakis, M.Salehi, “Fundamentals of Communication Systems” – Pearson
Education 2006
REFERENCES
1. B.Sklar, “Digital Communications Fundamentals and Applications” 2/e Pearson
Education 2007
2. S.Haykin, “Communication Systems” 3/e, John Wiley 2007
3. B.P.Lathi, “Modern Digital and Analog Communication Systems”, 3/e, Oxford
University Press,2007
4. D.Roody, J.Coolen, “Electronic Communications”, 4/e PHI 2006
5. H P Hsu, Schaum Outline Series - “Analog and Digital Communications” TMH
2006
3 0 0 3
UNIT I ANALOG MODULATION 9
Amplitude Modulation – AM, DSBSC, SSBSC, VSB – Angle modulation – PM and
FM –Modulators and Demodulators – Fourier Transform of modulated signals.
UNIT II RECEIVER CHARACTERISTICS 9
Noise sources and types – Noise figure and noise temperature – Noise in cascaded
systems – Single tuned receivers - Superheterodyne receivers
UNIT III BASEBAND TECHNIQUES 9
Review of low pass sampling – Quadrature sampling of Bandpass signals –
Quantisation – Uniform and non-uniform quantisation – Quantisation noise –
Companding laws of speech signals – PCM, DPCM, DM, ADPCM and ADM
Multiplexing – TDM (E and T lines), FDM
UNIT IV BANDPASS SIGNALING 9
Geometric representation of signals – Correlator and matched filter – ML detection –
generation and detection, PSD, BER of coherent BPSK, BFSK, QPSK – Principles of
QAM – Structure of non-coherent receivers – BFSK, DPSK.
UNIT V NOISE PERFORMANCE 9
Narrow band noise – PSD of in-phase and quadrature noise – Noise performance in
AM systems – Noise performance in FM systems – Pre-emphasis and de-emphasis
– Capture effect, threshold effect.
TOTAL: 45 PERIODS
TEXT BOOKS
1. J.G.Proakis, M.Salehi, “Fundamentals of Communication Systems” – Pearson
Education 2006
REFERENCES
1. B.Sklar, “Digital Communications Fundamentals and Applications” 2/e Pearson
Education 2007
2. S.Haykin, “Communication Systems” 3/e, John Wiley 2007
3. B.P.Lathi, “Modern Digital and Analog Communication Systems”, 3/e, Oxford
University Press,2007
4. D.Roody, J.Coolen, “Electronic Communications”, 4/e PHI 2006
5. H P Hsu, Schaum Outline Series - “Analog and Digital Communications” TMH
2006
