23-127 Communications satellite, 231-235 Direct digital synthesizer, 141-144 Continuous tone coded squelch Direct sequence spread spectrum, system, 239 72-75 Cooke, 4 Director, 102 Critical frequency, 40 Discone antenna, 104 Cross modulation, 177 Discontinuous transmission, 267 Crystal filter, 149, 165 Divider frequency, 138 Index 293 DMO, 244 shape factor, 168 DSP, 162 stop-band, 168 DSSS, 72-75 Fleming, John Ambrose, 7, 8, 9 DTMF, 239 FM, 58-60 DTX, 267 broadcasting, 207 Dual tone multiple frequency, 239 demodulation, 153-162 Dynamic range, 177 transmitter, 199 Folded dipole, 97 Foster-Seeley demodulator, 158 E layer, 31, 33 Frequency, 21 EDGE, 249, 268 Frequency divider, 138 Edison, 5, 8 Frequency division duplex, 256, 276 Efficiency of amplifier, 182 Frequency division multiple access, Electric field, 17-19 Electromagnetic wave, 20, 21 Frequency hopping, 71 Electromagnetic wave spectrum, 22 Frequency modulation, 58 Elliptical orbit, 223 Frequency modulation transmitter, End fed wire antenna, 99 Enhanced date rates for global Frequency multiplier, 185 evolution, 249, 268 Frequency shift keying, 62 Enhanced other networks, 214 Frequency synthesizer, 135-144, 181 EON, 214 FSK, 62 EV-DO, 273-275 EV-DV, 273-275 Gain antenna, 79 Gaussian filtered minimum shift F layer, 31, 33, 34 keying, 65-67, 266 Fading, 42 General packet radio system, 249, Faraday, 4 Geocentre, 223 Faraday rotation, 231 FDD, 256, 276 Geostationary orbit, 223, 225 Gilbert, William, 3 FDMA, 249 Feeder, 84-94 Global system for mobile telecommunications, 248, balanced, 92 263-268 coaxial, 90 GMSK, 65-67, 266 impedance, 85 GPRS, 249, 268 loss, 89 GPS, 235 twin, 92 Ground wave, 34 Ferrite rod antenna, 112 Groundtrack, 223 Filter, 188-191 audio, 165 Groupe speciale mobile, 248 GSM, 15, 248, 263-268 bandwidth, 166-168 Butterworth, 190 ceramic, 150, 165 Harmonics, 190 crystal, 149, 165 Henry, 4, 5 IF, 148-151 Hertz, Heinrich, 5, 21 LC, 149, 165 HLR, 265, 278 pass-band, 167 Hohmann transfer principle, 228 294 Index Home location register, 265, 278 Matchin