3251

Lanzagorta, Marco

xv, 113 pages illustrations 24 cm

Synthesis lectures on communications

"This volume is a printed version of a work that appears in the Synthesis digital library of engineering and computer science"--P. 4 of cover , Includes bibliographical references (pages 97-112) , Perfectly secure communications -- Public key distribution protocols -- Electrodynamics of attenuating media -- Propagation in attenuating media -- Maxwell equations in material media -- Electromagnetic waves in dielectrics -- Electromagnetic waves in conductors -- Attenuation and refractive indices -- Molecular absorption -- Resonant absorption -- Low-frequency limit -- The plasma frequency -- Energy dissipation -- Molecular scattering -- Density and temperature fluctuations -- Rayleigh scattering -- Mie scattering -- Underwater communication channels -- Noisy channels -- The noisy-channel coding theorem -- The Shannon-Hartley theorem -- The fiber optic channel -- The acoustic channel -- The RF channel -- The optical channel -- Electrical conductivity -- Molecular absorption -- Molecular scattering -- Particles, plankton, and gelbstoffe -- Beam spreading -- Multi-path propagation -- Background noise -- Underwater optical communications: technology -- Underwater optical communications -- Previous efforts -- System design -- Receiver -- Photosensor -- Photo-multiplier tubes -- Semiconductor photosensors -- Biologically-inspired quantum photosensors (BQP) -- Transmitter -- Optical source -- Argon-ion lasers -- DPSS lasers -- InGaN lasers -- Tunable lasers -- Laser modulators -- LEDs -- Other technological considerations -- Underwater optical communications: noise analysis -- Data rate -- Signal-to-noise ratio -- Sensor responsivity and excess noise -- Quantum shot noise -- Optical excess noise -- Laser intensity noise -- Modal noise -- Mode partition noise -- Optical background noise -- Background solar radiation -- Backscattered laser radiation -- Photo-detector dark current noise -- Electronic noise -- Thermal noise -- Electronic shot noise -- 1/f noise -- Preamplifier noise -- Underwater optical communications: system performance -- Optical attenuation -- Noise equivalent power -- Signal-to-noise ratio -- Channel capacity -- Underwater quantum communications -- Quantum cryptography -- Quantum information -- Quantum key distribution -- The BB84 QKD protocol -- Quantum bit error rate -- Performance of the quantum channel -- Clear ocean waters -- Intermediate and murky ocean waters -- Quantum efficiency -- Field of view -- Attenuation coefficient -- Maximum capacity of the classical channel -- Secret key generation rate -- Underwater communication channels -- Underwater RF communications -- Underwater optical communications -- Open questions -- The bottom line