A novel cellular architecture model is proposed, in which a cell coverage isdivided into annular zones by means of vertically multi-beam-splitting of base antenna for betterperformance. In this paper, the characterist...A novel cellular architecture model is proposed, in which a cell coverage isdivided into annular zones by means of vertically multi-beam-splitting of base antenna for betterperformance. In this paper, the characteristics of handover in this cellular model are studied withthe emphasis on the handover initiation probability, where the distance between the MS and the BS isused as a criterion. Simulation results show that the new model is attractive on reducing handoverprobability compared with the traditional sectoring cells.展开更多
This paper first gives a definition for personal communication, then discusses some key problems to besolved in realizing PC and lastly gives some personal suggestions.
As we know, the future generation com-munication system is on the way to bedigitalized, integrated, broadband, intel-ligent, standardized and customized, andthe personal wireless communication systemmeets the demands....As we know, the future generation com-munication system is on the way to bedigitalized, integrated, broadband, intel-ligent, standardized and customized, andthe personal wireless communication systemmeets the demands.ZTE’s personal wireless communicationsystem (ZXPCS) is based on the personalhandset system (PHS) and deployed in morethan 110 cities in China. It is working well andwidely accepted by the carriers, which makesgreat contributions to the local economy and展开更多
We design a compact triplexer based on two-dimensional （2D） hexagonal lattice photonic crystals （PCs）. A folded directional coupler （FDC） is introduced in the triplexer beside the point-defect micro-cavities and...We design a compact triplexer based on two-dimensional （2D） hexagonal lattice photonic crystals （PCs）. A folded directional coupler （FDC） is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides. Because of the reflection feedback of the FDC, high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained. The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method. The footprint of the triplexer is about 12 9 μm, and its extinction ratios are less than -20 dB for 1310 nm, approximately -20 dB for 1490 nm, and under -40 dB for 1550 nm, making it a potentially essential device in future fiber-to-the-home networks.展开更多
文摘A novel cellular architecture model is proposed, in which a cell coverage isdivided into annular zones by means of vertically multi-beam-splitting of base antenna for betterperformance. In this paper, the characteristics of handover in this cellular model are studied withthe emphasis on the handover initiation probability, where the distance between the MS and the BS isused as a criterion. Simulation results show that the new model is attractive on reducing handoverprobability compared with the traditional sectoring cells.
文摘This paper first gives a definition for personal communication, then discusses some key problems to besolved in realizing PC and lastly gives some personal suggestions.
文摘As we know, the future generation com-munication system is on the way to bedigitalized, integrated, broadband, intel-ligent, standardized and customized, andthe personal wireless communication systemmeets the demands.ZTE’s personal wireless communicationsystem (ZXPCS) is based on the personalhandset system (PHS) and deployed in morethan 110 cities in China. It is working well andwidely accepted by the carriers, which makesgreat contributions to the local economy and
基金supported by the National Natural Science Foundation of China (Nos. 60978010, 60907032, and 60825103)the Natural Science Foundation of Zhejiang Province (No. Y1090169)+1 种基金the Foundation of Zhejiang University of Technology (No. 0901103012408)the Open Fund of the State Key Laboratory of Advanced Optical Communication Systems and Networks, China (No. 2008sh07)
文摘We design a compact triplexer based on two-dimensional （2D） hexagonal lattice photonic crystals （PCs）. A folded directional coupler （FDC） is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides. Because of the reflection feedback of the FDC, high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained. The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method. The footprint of the triplexer is about 12 9 μm, and its extinction ratios are less than -20 dB for 1310 nm, approximately -20 dB for 1490 nm, and under -40 dB for 1550 nm, making it a potentially essential device in future fiber-to-the-home networks.
