2-225 Orthogonal code, 72 Quadrature demodulator, 159 Orthogonal frequency division Quieting, 155 multiplex, 75 Oscillator, 179 Oscillator crystal mixer, 180 Oscillator variable frequency, 180 Radiation angle, 83 Output impedance, 193 Radio data service, 211-215 Radio network controller, 278 Radio spectrum, 22, 23 Paget, 7 Radio wave, 20 PAM, 68 Ratio demodulator, 157 Parabolic reflector, 110-112 Receiver: Pass-band, 167 automatic gain control, 133 Path calculation, 229 crystal set, 120 Path loss, 26 direct conversion, 123-127 PCM, 69 multiple conversion, 132 PDO, 244 sensitivity, 169-174 Perigee, 223 superhet, 127-133 Phase, 136 TRF, 121 Phase accumulator, 142 Reciprocal mixing, 164 Phase comparator, 137 Reflected signals, 29 Phase locked loop, 136 Reflection (of radio waves), 26, 27 Phase locked loop FM demodulator, Reflector, 102 Refraction (of radio waves), 26-28 Phase modulation, 63, 64 Regenerative detector, 122 Phase modulator, 202 Resonance, antenna, 76 Phase noise, 164 RF amplifier, 144 Phase shift keying, 64 RNC, 278 Phased array antenna, 99-101 Round, H.J., 10, 11 Phasing method of SSB generation, Picocell, 255 Satellite communications, 231-235 PLL, 136 Satellite, direct broadcast, 234 PM, 63, 64 Satellite, navigational, 235 Polar diagram, 79, 82 Satellite orbit, 221-225 296 Index Satellite weather, 236 Superhet receiver, 127-133 Satellites, 225-228 SWAP, 289 SCA, 212 SWR, 88, 187 Selectivity, 166-169 Synchronous AM demodulation, 153 Sensitivity, 169-174 Synthesizer, 135-144, 181 SFN, 219 Synthesizer, direct digital, 141-144 Shape factor, 168 Synthesizer, multi-loop, 140 Shared wireless access protocol, 289 Short antenna, 109 Short message service, 264, 267 TACS, 248 Short wave broadcast bands, 206 TDD, 256, 276 Short wave broadcasting, 204-207 TDMA, 249 SID, 43 TD-SCDMA, 249, 280 Sideband, 55 Telstar, 14 Sidebands (of FM signal), 60 TETRA, 239, 243-246 Signal to noise ratio, 171 Third order intercept, 176 Signal to noise ratio improvement, Time division duplex, 256, 276 Time division multiple access, 