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In recent years, data traffic over cellular networks has experienced an exponential rise, primarily due to the explosion of smartphones, tablets and laptops. This increase in data traffic on cellular networks has caused an immediate need for offloading traffic for optimum performance of both voice and data services. The paper focuses on the coverage improvements of high floor users by offloading these...
The rapidly time-varying channel in high-speed railway poses tough design challenges, which necessitates the research of accurate channel models. Existing researches focus on the isolated high-speed railway scenarios, and mainly deal with path loss, shadowing fading, Ricean K-factor and delay spread. However, few studies have been done in Doppler domain. In this paper, a deterministic channel model...
With the rapid increase of traffic in cellular networks, low power nodes overlaid within a macro network is considered to be a cost-effective way to significantly enhance the capacity of cellular networks. In this paper, the impact of the pico cell antenna pattern and tilt on the performance of TD-LTE networks is analyzed in 3D Scenario. The optimal values of antenna tilts and the choice of antenna...
This paper focuses on the influence of mobility in rapidly time-varying channels. Local and global behaviors are researched based on the path-based channel model and ray-tracing channel model, respectively. The scenario employed in the global behavior analysis is a realistic composite high-speed railway (HSR) scenario, which is reconstructed by SketchUp. The analysis results include frequency modulation...
Outdoor Micro cell has been considered as a cost efficient way to increase in-building coverage and capacity. Micro cell configured with up-tilting antenna potentially improve the high floor coverage in high rise buildings. In this paper, the network performance of micro site is studied using a realistic TD-LTE network located in city center of Beijing with many high rise buildings. Micro User Equipment...
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