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To derive higher diversity effect, the simultaneous use of direct (and/or regenerative relay-aided) and nonregenerative relay-aided links is sometimes useful. This paper studies on fundamental aspects of “dirty signal using (DSU)”, a spatial diversity scheme utilizing both clean signal from the source and noise corrupted “dirty signal” from the AF (amplify-and-forward) relay. The conditions under...
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...
In multiple transmitter multiple receiver (MTMR) communication represented by multi-cellular systems, receivers (UTs: user terminals) might be located far from their target transmitter (BSs: base stations), and suffered from attenuation of the desired signal and strong interferences from nontarget transmitters. As a solution to this problem, this paper considers multi-cellular system using the cooperation...
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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