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LoRa, an emerging wireless technology, is examined for long range communication performance in a large area. Although LoRa shows good performance for long-distance transmission in the countryside, its radio signals can be attenuated and interfered with by buildings, trees and other signal sources. In urban areas, our observation shows that LoRa requires a dense deployment of LoRa gateways to ensure...
Pattern division multiple access (PDMA) is one of the important candidate multiple access technologies for future 5G wireless communication systems. It can improve the spectral efficiency and support the massive connection based on the reasonable unequal diversity between users. This paper investigates the outage performance and achievable sum data rate of uplink PDMA system. The developed analytical...
With the rising of smart devices and data-intensive service, more and more people have been dedicated to the study of a novel network architecture and communication solution. As 5G revolutionizes how humans acquire, manage and engage with information, this trend will accelerate. To meet this evolution, a novel admission control strategy in LTE-A and WLAN integrated network is proposed in this paper...
A novel circuit structure for a tri-band Wilkinson power divider is proposed that can suppress the harmonic components, and provides the equal power division ratios. It consists of three-section transmission lines, two inductors, and two isolation resistors. Using rigorous even- and odd-mode analysis, the analytical design equations for this proposed power divider are obtained. In addition, a divider...
Distributed antenna system (DAS) could provide high throughput for multi-users. The uplink sum transmission rate is studied in a multi-user DAS scenario. An uncomplicated antenna selection strategy is proposed to approach high sum rate. Considering fairness, the performance of inferior user could be improved remarkable with low sum rate loss in two-user scenario.
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