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Inter-Well Coupling and Resonant Tunneling Modes of Multiple Graphene Quantum Wells
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作者 安丽萍 王同标 刘念华 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第8期367-372,共6页
We investigate the inter-well coupling of multiple graphene quantum well structures consisting of graphenesuperlattices with different periodic potentials.The general form of the eigenlevel equation for the bound stat... We investigate the inter-well coupling of multiple graphene quantum well structures consisting of graphenesuperlattices with different periodic potentials.The general form of the eigenlevel equation for the bound states of thequantum well is expressed in terms of the transfer matrix elements.It is found that the electronic transmission exhibitsresonant tunneling peaks at the eigenlevels of the bound states and shifts to the higher energy with increasing the incidentangle.If there are N coupled quantum wells,the resonant modes have N-fold splitting.The peaks of resonant tunnelingcan be controlled by modulating the graphene barriers. 展开更多
关键词 graphene superlattice quantum well resonant tunneling modes inter-well coupling transfer matrix
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Power allocation and mode selection methods for cooperative communication in the rectangular tunnel 被引量:2
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作者 Zhai Wenyan Sun Yanjing +1 位作者 Xu Zhao Li Song 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第2期253-260,共8页
For the multipath fading on electromagnetic waves of wireless communication in the confined areas,the rectangular tunnel cooperative communication system was established based on the multimode channel model and the ch... For the multipath fading on electromagnetic waves of wireless communication in the confined areas,the rectangular tunnel cooperative communication system was established based on the multimode channel model and the channel capacity formula derivation was obtained.On the optimal criterion of the channel capacity,the power allocation methods of both amplifying and forwarding(AF) and decoding and forwarding(DF) cooperative communication systems were proposed in the limitation of the total power to maximize the channel capacity.The mode selection methods of single input single output(SISO) and single input multiple output(SIMO) models in the rectangular tunnel,through which the higher channel capacity can be obtained,were put forward as well.The theoretical analysis and simulation comparison show that,channel capacity of the wireless communication system in the rectangular tunnel can be effectively enhanced through the cooperative technology;channel capacity of the rectangular tunnel under complicated conditions is maximized through the proposed power allocation methods,and the optimal cooperative mode of the channel capacity can be chosen according to the cooperative mode selection methods given in the paper. 展开更多
关键词 Rectangular tunnel Multimode channel model Channel capacity Cooperative communication Power allocation mode selection
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