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Considering environment protection and cost-efficiency, cloud radio access network (C-RAN) has received considerable attention. In C-RAN, centralized baseband units (BBUs) are composed of high-capacity processing units and realtime virtualization, so the BBU can control resource allocation according to the distribution of users, which will keep the system work with the highest bandwidth efficiency...
Device-to-device (D2D) communication has been developed as a promising technology to meet the unrelenting demand for high data rate services by providing a direct link between users. In this paper, we investigate the performance of D2D communications underlaying cellular networks using stochastic geometry, where Rician fading is modeled to characterize the line-of-sight (LoS) component in the D2D...
Distributed antenna systems (DAS) are deployed not only for enhancing coverage, but also for reducing the transmission power consumption, which have emerged as the promising candidate for energy-efficient wireless communications. In this paper, orthogonal and co-channel resource allocation schemes considering energy efficiency in single-cell DAS are analyzed. For orthogonal resource allocation scheme,...
A time sharing relaying system model using Orthogonal Frequency Division Multiple Access (OFDMA) is investigated in this paper, where eNode B transmits to relay and macro user equipments (M-UEs) during the first time slot, and in the second time slot messages are conveyed to remote user equipments (R-UEs) by the relay with relay acting in the decode-and-forward (DF) mode. These two transmissions are...
In the next generation wireless systems, it's quite likely that a large number of user terminals are not able to transmit and/or receive over the entire system bandwidth, as much wider system bandwidth, e.g., 100 MHz, is expected to be employed in the future. As a new and challenging problem, user terminal bandwidth limitation is considered in this paper, and multiuser resource allocation for orthogonal...
A novel heterogeneous cooperative relay channel model is proposed in this article. It can integrate various wireless access systems into one entity and improve the spectrum efficiency remarkably. According to the characteristics of the heterogeneous and conventional homogeneous cooperative relay channel model, the outage probability performance is investigated over Nakagami-m fading model. A numerical...
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