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The exponentially growing mobile data usage in recent years pushes the evolution of cellular network technologies to the 4th generation which is the Long Term Evolution (LTE) system. Providing good coverage for indoor users is essential for LTE system since it is estimated that indoor data traffic dominates nearly 80% of the total volume of data traffic. Fiber-based Distributed Antenna System (DAS)...
Resource allocation issue is studied for broadcast mode of device-to-device (D2D) communication in cellular networks. We design systematic methods for transmission sub-frame selection by broadcast UEs. Firstly, we design transmission patterns based on Hadamard matrix for the case with 8 D2D sub-frames per D2D period. Then, we expand transmission patterns to the 16 sub-frame case. Accordingly, we design...
Interference mitigation scheme is studied for Device-to-Device (D2D) communication in cellular networks to improve the overall system capacity and spectrum efficiency. Firstly a lower bound of the neighbor distance is derived for a D2D UE according to the transmitter density and the QoS requirement of a D2D pair. By using this distance, a neighbor set can be chosen adaptively based on the interference...
The underwater acoustic (UWA) communication has been regarded as one of the most challenging wireless communications due to the unique properties, such as limited bandwidth, extended multipath delay, medium inhomogeneities, rapid time-variation and large Doppler shifts. Cooperative relaying technique is a promising technique to provide high rate data transmission. However, literature on cooperative...
As the development of service industry, service teams have emerged as an increasingly popular boundary-spanning structure in service firms, especially in the professional service area. Previous researches separated on the road revealing the element and structure that keep service teams highly effective, and there are research gaps between knowledge managing issue and team efficacy in service teams...
In this paper, we propose a dynamic power allocation scheme for a single-relay network based on orthogonal frequency division multiplexing (OFDM) modulation with limited feedback.We consider an Amplify-and-Forward (AF) cooperative diversity model, where one source node communicates with one destination node assisted by one half duplex relay. The power allocation scheme employs a codebook of quantized...
According to the actual problems of traditional tough experiment teaching mode such as lab construction, operation management, project update and so on, on the base of analysis the physical and rigid space-time occupation of tough experiment teaching mode, and the relationship of experiment construction, management, update, specify that, the physical and rigid space-time occupation are the source...
It has been shown that channel state information (CSI) at transmitter can significantly increase the performance of a relay system. However, most of the existing designs assume perfect CSI at the transmitters. Since most practical systems can only obtain partial CSI at the transmitters, it is necessary to analyze the relay channels with limited CSI feedback. Our objective in this paper is to find...
Mobile video broadcasting service, or mobile TV, is a promising application for 3G wireless network operators. Most existing solutions for video broadcast/multicast services in 3G networks employ a single transmission rate to cover all viewers. The system-wide video quality of the cell is therefore throttled by a few viewers close to the boundary, and is far from reaching the social-optimum allowed...
Relay enhanced cellular (REC) system and orthogonal frequency division multiple access (OFDMA) technology are regarded as the key features of 4G communication systems. How to utilize resource wisely in OFDMA-based REC systems is an important and challenging research topic. This paper reviews the major issues in designing radio resource management (RRM) algorithms for REC systems. A new resource allocation...
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