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In cellular systems, BSs (base stations) are ideally desired to be located in the center of cells, but it is sometimes impossible because of the physical and/or social restrictions on the BS setting space. This paper considers the influence of the displacement of the BS location on BS cooperation (BSC) scheme in MIMO (multiple input multiple output) cellular system. For this aim, BS locations are...
This paper studies multiuser MIMO (multiple input multiple output) system with a mixed structure of two transmission schemes in which each user chooses direct or AF (amplify and forward) relay-aided link depending on the channel condition. First, an equivalent two stage MTMR (multiple transmitter multiple receiver) model is introduced to simplify the problem, then SINR (signal to interference plus...
This paper presents design methods of two way AF (amplify and forward) relay systems equipped with multiantenna assuming perfect knowledge of CSI (channel state information). A simple SVD (singular value decomposition) based method using separable relay weights and an iterative design based on maximum SINR (signal to interference plus noise ratio) criterion adopting nonseparable relay weights are...
In ITS (intelligent transport system), the communication quality could be degraded by the existence of shielding objects such as large vehicles and buildings. The relay-aided transmission is an effective solution to this problem which keeps the reliability of inter-vehicle and/or road-to-vehicle links which directly concern to the safety of the transportation. This paper considers the weight design...
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