B. P. Lathi, Zhi Ding - Modern Digital and Analog Communication Systems-Oxford University Press (2009)

Contents
1x
3 .6 SIGNAL DISTORTION OVER A COMMUNICATION
CHANNEL 97
3.6.1 Linear Distortion 97
3.6.2 Distortion Caused by Channel Nonlinearities 99
3 .6.3 Distortion Caused by Multipath Effects 101
3 .6.4 Fading Channels 103
3.7 SIGNAL ENERGY AND ENERGY SPECTRAL DENSITY 103
3.7.1 Parseval's Theorem 103
3 .7.2 Energy Spectral Density (ESD) 104
3.7.3 Essential Bandwidth of a Signal 105
3.7.4 Energy of Modulated Signals 108
3.7.5 Time Autocorrelation Function and the Energy
Spectral Density 1 09
3.8 SIGNAL POWER AND POWER SPECTRAL DENSITY 111
3.8.1 Power Spectral Density (PSD) 111
3.8.2 Time Autocorrelation Function of Power Signals 113
3.8.3 Input and Output Power Spectral Densities 117
3.8.4 PSD of Modulated Signals 118
3.9 NUMERICAL COMPUTATION OF FOURIER TRANSFORM:
THE DFT 118
3.10 MATLAB EXERCISES 123
4
5
AMPLITUDE MODULATIONS
AND DEMODULATIONS 140
4.1 BASEBAND VERSUS CARRIER COMMUNICATIONS 140
4.2 DOUBLE-SIDEBAND AMPLITUDE MODULATION 142
4.3 AMPLITUDE MODULATION (AM) 151
4.4 BANDWIDTH-EFFICIENT AMPLITUDE MODULATIONS 158
4.5 AMPLITUDE MODULATIONS: VESTIGIAL SIDEBAND (VSB) 167
4.6 LOCAL CARRIER SYNCHRONIZATION 170
4.7 FREQUENCY DIVISION MULTIPLEXING (FDM) 172
4.8 PHASE-LOCKED LOOP AND SOME APPLICATIONS 173
4.9 MATLAB EXERCISES 181
ANGLE MODULATION
AND DEMODULATION
5.1 NONLINEAR MODULATION 202
202
5.2 BANDWIDTH OF ANGLE-MODULATED WAVES 209