《通信系统工程(第2版改编版)》为国外电气信息类优秀教材改编系列之一。 |
preface 1 introduction 1. 1 historical review 1 1.2 elements of an electrical communication system 1.2.1 digital communication system 9 1.2.2 early work in digital communications 13 1.3 communication channels and their characteristics 1.4 mathematical models for communication channels 1.5 organization of the book 28 1.6 further reading 30 2 analog signal transmission and reception 2.1 introduction to modulation 32 2.2 amplitude modulation (am) 33 2.2.1 double-sideband suppressed carrier am 33 2. 2. 2 conventional amplitude modulation 40 2.2.3 single-sideband am 44 * 2.2.4 vestigial-sideband am 48 2.2.5 implementation of am modulators and demodulators 52 2.2.6 signal multiplexing 58 .2.3 angle modulation 61 2.3. 1 representation of fm and pm signals 62 2.3.2 spectral characteristics of angle-modulated signals 66 2.3. 3 implementation of angle modulators and demodulators 73 2.4 radio and television broadcasting 81 2.4.1 am radio broadcasting 82 2.4. 2 fm radio broadcasting 84 2.4.3 television broadcasting 87 2.5 mobile radio systems 97 2.6 further reading 100 problems 100 3 effect of noise on analog communication systems 115 3.1 effect of noise on linear-modulation systems 115 3.1.1 effect of noise on a baseband system 116 3. 1.2 effect of noise on dsb-sc am 116 3. 1.3 effect of noise on ssb am 118 3.1.4 effect of noise on conventional am 119 *3.2 carrier-phase estimation with a phase-locked loop (pll) 124 3.2. 1 the phase-locked loop ( pll ) 125 3.2.2 effect of additive noise on phase estimation 128 3.3 effect of noise on angle modulation 135 3.3. 1 threshold effect in angle modulation 145 3.3.2 pre-emphasis and de-emphasis filtering 149 3.4 comparison of analog-modulation systems 153 3.5 further reading 154 problems 155 4 information sources and source coding 161 4.1 modeling of information sources 162 4. 1.1 measure of information 164 4.1.2 joint and conditional entropy 167 4.2 source-coding theorem 169 4.3 source-coding algorithms 172 4.4 rate-distortion theory 177 4. 4. 1 mutual information 178 4. 4. 2 differential entropy 179 4.4.3 rate-distortion function 181 4.5 quantization 187 4.5. 1 scalar quantization 188 * 4.5.2 vector quantization 198 4.6 waveform coding 201 4.6. 1 pulse-code modulation ( pcm) 201 4. 6. 2 differential pulse-code modulation ( dpcm) 207 4.6. 3 delta modulation (am) 210 4.7 digital audio transmission and digital audio recording 213 4. 7. 1 digital audio in telephone transmission systems 214 * 4. 7. 2 digital audio recording 216 4.8 further reading 221 problems 222 5 digital transmission through the additive white gaussian noise channel 6 digital transmission through bandlimited awgn channels 7 channel capacity and coding 8 wireless communications references indes |
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