e domains, 375-6 Copper twisted pair, 55, 259 Descriptive maths, 224 Coriolis effect, 132-3 Despreading codes, 64, 69 Index Desuvire, Emmanuel, 25 DSP (digital signal processing), 17, 29, Device Access/Device Area Networks 52-4, 164-5, 189, 208, 376 (DANS), 73 DTI, 272 Device centric software, 175 DTT DVB UHF transmissions, 283 DFT analysis equation, 50 Dual band GSM, 116, 130 DiBcom, 327 Dual band short wave/VHF radio, 126 Dielectrics, 119-20 Dual transfer mode, 282 Diffserv, 342-3 Duplex filters, 101, 103, 106-7, 113, Dig RF work group, 162 118-19, 144, 151, 282, 309, 314 Digital AM, 277 Duty cycle, 100, 106, 112, 120, 122, 139, Digital Britain Report, the, 243, 247 146, 170, 177, 180, 290, 305 Digital broadcasting, 246, 279 DVB, 35, 102-3, 144, 169-70, 246, Digital camcorder, 201 280-281, 291-5, 324, 327 Digital camera, 188, 192, 194, 197, 209 DVB H, 280 Digital divide, 386 DV resolution, 200 Digital duplexers, 101 DV tape, 205 Digital filtering, 107 DV video, 201 Digital Radio Mondiale, 277, 283 DWDM systems, 31 Digital SLR, 193-6, 203 Digital TV, 284, 286, 313 E book, 137 Diode valve see De Forest, Lee, 21 E node B, 106, 259 Diplex filter functions, 118 EADS, 306, 309 Diplexing, 113 EBU, 291 Dirac, Paul, 1, 388 Eckersley, Captain PP, 275 Direct conversion receivers, 107, 118 Eclipse Café 2006, 222 Direct Sequence Spread Spectrum (DSSS), Economic efficiency/theory, 115, 229, 244 Economic theory, 229 Directional sensitivity, 132 EDGE, 111, 123, 136, 164, 280, 282 Disambiguation algorithms, 218, 223 Edge of band performance, 148 Discrete Cosine Transform (DCT), 189 Edison, Thomas Alva, 1, 20, 171 Dispersion, 25-31, 39 EF50 valve, 22 Display technologies, 135, 142, 177 Efficiency gains, 384-5 Disquisitiones arithmeticae, 57-8 EHF satellite hybrid MEO GSO network, Distributed co-ordination functions, 71 Diversity gain, 69 Einstein, Albert, 24, 58 Divide down effect, 144 Electric Telegraph Company, 269 DMB, 280 Electromagnetic induction microphones, 131 DMB T, 327 Electromechanical switches, 239, 242 DMR, 305 Elec