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Characterizing user access methods in heterogeneous cloud radio access networks (H-CRANs)is critical for performance optimization. Different from the user access in cloud radio access networks, the inter-tier interference from macro base station has a great impact on user access in H-CRANs. In this paper, after considering the inter-tier interference, the ergodic rates of downlink H- CRANs for two...
Current researches on multiple-input multiple-output (MIMO) channel treat it as a kind of Gaussian channel. Without considering the spatial-temporal correlation, considerable deviation exists in output. This paper presents a novel spatial-temporal correlation model (STCM) for MIMO channel modeling. We adopt a correlation matrix to model the spatial correlation at the base and use wave superposition...
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