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Iterative water-filling for Gaussian vector multiple access channels
channel capacity convex optimization Gaussian channels multiuser channels multiple-access channels multipleaccess communications multiple-antenna systems optimization methods power control water-filling
2015/8/11
We develop an efficient iterative water-filling algorithm to find an optimal transmit spectrum for maximum sum capacity in a Gaussian multiple access channel with vector inputs and a vector output. Th...
Invest igation on partially coherent vector beams and their propagation and focusing properties
Invest igation partially coherent vector beams propagation focusing properties
2013/7/3
The propagation and focusing properties of partially coherent vector beams including radially polarized and azi-muthally polarized (AP) beams are theoretically and experimentally investigated. The bea...
Generation of super-len gth optical needle by focusi ng hybridly polarize d vector beams through a dielectric interface
Generation super-len gth optical needle focusing hybridly polarize dvector beams dielectric interface
2013/7/3
A super-length optical needle (～14λ) of strong transversally polarized field with homogeneous intensity along the optical axis and subdiffraction beam size ( ～0 .9λ) can be generated by focusing a hyb...
Solving the inverse problem of high numerical aperture focusing using Slepian-type vector fields
High numerical aperture focusing Vector diffraction theory Inverse problem Slepian’s concentration problem
2012/5/29
A technique using vector Slepian harmonics and multipole fields is presented for a general treatment of the inverse problem of high numerical aperture focusing. A prescribed intensity distribution or ...
Deterministic Vector Freak Waves
Deterministic Vector Freak Waves Exactly Solvable and Integrable Systems
2012/4/26
We construct and discuss a semi-rational, multi-parametric vector solution of coupled nonlinear Schr\"odinger equations (Manakov system). This family of solutions includes known vector Peregrine solut...
Tight focusing properties of hybridly polarize d vector beams
Tight focusing properties hybridly polarize dvector beams
2013/7/3
We theoretically investigate the tight focusing properties of hybridly polarized vector beams. Some numerical results are obtained to illustrate the intensity, phase, and polarization of tightly focus...
A Novel Direct Detection Microwave Photonic Vector Modulation Scheme for Radio-Over-Fiber System
2011/11/22
This letter demonstrates the feasibility of a novel direct detection microwave photonic vector modulation scheme for the radio-over-fiber (RoF) system. Unlike the traditional double-sideband with opti...
Generation of Vector Beams with Axially-Symmetric Polarization
Vector beam Axially-symmetric polarization Liquid crystal
2009/6/8
Based on the optical rotatory effect of liquid crystal, we have fabricated a compact and efficient optical device for control of space-variant polarization. Using this device we generated vector beams...