• 4-QAM digital modulation transmission, 209, 226
• 16-QAM modulator constructed from two QPSK modulators, 248, 252, 253

A

• amount of binary information, 22, 27, 28
• amplitude shift keying (ASK) modulation, 201, 205, 206, 219–221, 224, 247, 250, 284, 286
• amplitude spectrum, 257
• autocorrelation function, 89–91, 96, 97, 106, 108, 109, 121, 122
• average
  • amount of information
    • lost, 7, 9, 10
    • received, 4, 22, 28
  • length, 16, 272

B

• baseband
  • digital transmission, 83, 135, 144, 152, 163, 273, 285
    • of bipolar coded information, 163
  • transmission and reception using a partial response linear coding, 129
• binary symmetric channel, 7
• bipolar
  • encoder, 84, 164, 170
  • RZ code, 108
• bitrate, 14, 20, 272
  • measurement, 272
• block diagram
  • baseband transmission system, 136, 152
  • carrier modulation and demodulation, 200
  • combined precoder, transcoder and encoder, 193
  • precoder, transcoder and duobinary coder, 185
  • RZ bipolar encoder and decoder, 170

C

• carrier signal, 200, 210, 220, 236, 256
• channel capacity, 14, 20
• characteristic impedance, 268, 270–272
• chronograms, 89, 127, 129, 185, 285, 286
  • of the different signals, 131, 132
• code
  • cyclic, 53–55, 60–62, 66, 69, 75, 76, 78, 297
  • HDB-2, 84
  • HDB-3, 129
  • Huffman, 11–15, 17–22, 24, 27–29, 31, 35–38, 43–45, 83, 84, 86, 254
  • RZ and NRZ binary on-line, 89, 108
  • systematic, 48–50, 54, 61, 67, 70, 75, 298
• coder based on a linear feedback shift register (LFSR), 58
• coding and decoding by cyclic codes, 297
• complex envelope, 201–203, 206, 208, 211, 212, 214, 221, 227–230, 236–240, 248, 256
• compression ratio, 28
• constellation diagram, 245, 247, 250, 251, 292
• continuous component, 88, 100, 108, 124, 126–128, 132–134, 169
• control bits, 52, 54–56, 66, 69, 70, 73, 74, 77, 278, 299

D

• decision thresholds, 137, 145, 158, 159, 165, 171, 175, 186, 195, 262
• decoder
  • based on a linear feedback shift register (LFSR), 57, 58
  • implementation scheme, 56, 78
• digital modulations with carrier, 286
• digital transmission
  • on two-wire cables, 267
  • with carrier modulation, 199

E, F

• efficiency, 28, 29
• encoder
  • filter, 191
  • implementation scheme, 56
• energy, 124
  • bandwidth, 138, 146, 147, 164
• entropy, 16
  • conditional, 4
  • receiver, 3, 22, 28, 33
  • source, 3, 7, 10–12, 22, 27, 83
  • transmission error, 4
• equalization, 164
  • filter, 138, 146
• equivalent
  • baseband transmission and reception system, 202
  • low-pass filter, 201, 202, 211, 221, 227, 237, 238, 256
• error
  • decision, 88, 135, 185, 193
  • detection, 59, 63, 79, 273, 278, 281, 299
  • double, 59, 73
  • packet (see also proportion of detectable error packets), 59
    • average, 138
    • conditional, 3, 138, 147, 183, 229
  • single, 48, 59, 79
  • triple, 54, 59, 62, 75, 78, 79
  • word, 78, 299
• frequency
  • attenuation, 271
  • fundamental, 245, 249

G, H

• generator polynomial, 53, 56, 300
• Gold
  • generator, 81, 300
  • sequences, 75
• Hamming
  • coder, 52
  • coding, 66, 69
  • decoder, 53
• Hermitian symmetry, 202, 209, 221, 224, 237, 241

I, K

• information
  • bits, 52, 54, 66, 69, 70, 73, 77, 84
  • motion, 42, 253, 255
  • source, 7, 11
  • theory of, 3
• instantaneous decoding, 133
• interfering messages, 157, 172, 174, 216–218, 222, 225, 226, 231, 233, 234, 241
• intersymbol interference (ISI), 140, 142, 144, 150, 157, 158, 168, 231, 243, 245
  • inter-channel, 228, 256, 260–262
  • intra-channel, 202, 209, 228, 256, 260, 261
• K-order extension channel, 6

L, M, N, O

• length-percentage pairs of error packets, 75
• long distance transmission, 131
• M-sequences, 75, 80
• matrix
  • generator, 47, 48, 50, 54, 55, 66, 67, 69
  • parity, 47, 48
• minimum distance, 48, 49
• noise, 140, 146, 155, 167, 186, 212, 221, 256, 261
• Nyquist frequency criterion, 164
• on-line codes for baseband digital transmission, 285

P

• partial response linear encoder, 124, 181, 190
• path propagation
  • double, 238, 242
  • single, 235, 239
• performance of digital modulations, 245
• periodic function, 96, 107
• phase shift keying (PSK) modulation, 201, 204–206, 235, 245–250, 253, 255, 284–286, 288, 289, 291, 293
• polynomial information, 80
• power, 84, 87–90, 96, 99, 107–109, 121, 122, 124, 126, 128–134, 137–139, 143, 145–147, 149, 153, 164, 171, 200, 211, 212, 220, 222, 236, 246, 250, 274, 275, 285
  • noise, 139, 143, 146, 149, 171
  • spectral density, 96, 126
    • calculation, 89, 90, 96, 107–109, 126, 131, 138, 146
    • partial response linear on-line codes, 131
• precoder, 131, 193
• premultiplied coder, 63, 68
• primitive, 59, 61, 62, 66, 73, 75, 76, 79
• probability
  • conditional, 172
  • compound, 91, 110
  • error, 168, 178, 180, 226, 241
  • of having a bit at one , 47
  • of having a bit at zero, 25, 46, 260
  • of having at least one error, 41
  • of having no errors, 41
• proportion of detectable error packets, 59, 73
• pseudo-random number generator (PRNG), 74
• pulse amplitude modulation (PAM), 274
• pulse code modulation (PCM), 277

Q, R

• QPSK modem, 291
• quadrature amplitude modulation (QAM), 201
• redundancy, 36

S

• serial transmission under digital form of analog signals, 273
• signal
  • bandwidth, 84, 85, 126
  • equalized, 140, 143, 149, 153, 165
  • received, 137, 139, 145, 238, 277
  • useful, 137, 138, 145, 147, 154, 224, 228, 256, 260, 277, 278
• signal-to-noise ratio, 222
• source of binary information, 3, 28, 36
• spectrum shaping, 126
• structure
  • of the partial response coder, 130
  • of the polynomial, 80
• symbol, 7, 10, 12, 14, 25, 26, 29, 30, 32, 39, 85, 86, 118, 150, 165, 169, 213, 218, 222, 244, 257, 259
• syndrome, 57, 299
• systematic code, 48, 49

T, V, W

• time domain reflectometry (TDR), 270
• time multiplexing, 274
• transmission
  • channel, 4, 14, 281
  • error control, 277
  • line theory, 268
  • of motion information of digital video, 253
  • using a partial response linear coding, 124
• transmitted signal, 126, 127
• value of the frequency band, lower, 245
  • upper, 245
• word
  • code-, 20, 45, 49, 86
  • control, 49, 51, 54, 56
  • information, 49, 51, 66, 301
  • received, 47, 4