11,646 research outputs found
Modeling and performance evaluation of different CDMA schemes for terrestrial and satellite communication systems
Collision and fusion of counterpropagating micron-sized optical beams in non-uniformly biased photorefractive crystals
We theoretically investigate collision of optical beams travelling in
opposite directions through a centrosymmetric photorefractive crystal biased by
a spatially non-uniform voltage. We analytically predict the fusion of
counterpropagating solitons in conditions in which the applied voltage is
rapidly modulated along the propagation axis, so that self-bending is
suppressed by the "restoring symmetry" mechanism. Moreover, when the applied
voltage is slowly modulated, we predict that the modified self-bending allows
conditions in which the two beams fuse together, forming a curved light-channel
splice.Comment: 12 page
Advance Blind Adaptive Multiuser Detector for Communications in Non Stationary Multipath Fading Channel
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