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Small cells are becoming essential to offer a promising solution for dramatic mobile traffic growth in future mobile networks. Especially, massive enterprise femtocells are expected to provide high capacity to fulfill high data demands in buildings in order to offload indoor traffic from outdoor macro cells in that over 80% of mobile data traffic is generated indoors. However, as one of the major...
The linear frequency-modulated continuous-wave (LFMCW) millimeter-wave radar has been widely used in automotive industry applications. The motivation of this paper is to propose a segmented range detection (SRD) method on the foundation of plentiful mature research on the target detection of LFMCW radar. According to the SRD method, the detection range (about 150m in the scene of vehicular collision...
Fairness and system throughput, influenced by wireless interference, are major objectives of resource allocation in wireless networks. Whereas traditionally max-min fairness protocols have been developed for wired networks (where interference is not a factor for network performance), in this paper we investigate the problem of flow routing and fair bandwidth allocation under the constraints of the...
Multi-input multi-output (MIMO) techniques are used to provide space multiplexing and improve point-to-point link capacity in wireless communication systems, but due to the deep fading in channel gain, large noise and co-channel interference, the data packets are likely not to be recovered correctly in receiver, thus hybrid automatic repeat request (HARQ) is widely adopted to enhance the reliability...
The approximate minimum average symbol error rate (SER) precoder is designed for spatial multiplexing (SM) system in Ricean channels. Based on long-term channel state information (CSI), a closed-form solution that combines eigen-beamforming (E-BF) and power allocation is presented for correlated Ricean channel. Moreover, a simple precoder only based on K-factor and line-of-sight (LOS) departure angle...
Recently, there has been an upsurge of interest in multi-hop relay in both academia and industry. By breaking a long-distance low-quality link into two or more high-quality segments, multi-hop relay is introduced to enable traffic/signaling forwarding between base station and mobile user with the benefits of throughput enhancement and coverage extension. In this paper, we propose a novel retransmission...
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