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In this paper, we propose a mechanism to achieve multi-user (MU) MIMO downlink spatial diversity gain for both frequency flat and selective fading channel. The MU interference is first cancelled by precoding the signal with the null space (basis) of other users' propagation space and then the diversity gain is achieved by using the dominant eigen transmission (DET) method on the composite space of...
Deployment of heterogeneous networks is one of the key technologies in LTE-Advanced. After low-power nodes were introduced to cellular system, great changes have taken place in the structure of traditional networks. Thus, range expansion (RE) scheme is proposed to adapt to these changes in the standardization process of heterogeneous networks. This paper studies the performance of heterogeneous networks...
This paper investigates downlink frequency resource coordination for LTE network that comprises of macrocell and femtocell. Due to the requirement of high data rate for indoor coverage, femtocells have been considered as a potential solution recently. However, owing to their random and uncoordinated deployment, cross-tier interference exists and affects the system throughput seriously. A hybrid resource...
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