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Device-to-Device communication has been regarded as a promising technology to improve the cellular system efficiency, which allows mobile devices communicate directly with each other on the licensed frequency resources under the control of a base station (or eNB). However, the benefits of D2D using license exempt bands, such as ISM bands, have not been sufficiently taken into account yet. The main...
We computationally and experimentally demonstrate super absorption, in a flat ultra-thin organic photovoltaic layer on metal substrates, based on interference effects of strongly absorptive ultra-thin films.
Spatial Modulation (SM), conveying data bits via the antenna-activation process, is a novel modulation technique for multiple-input multiple-output (MIMO) systems. SM can be combined with orthogonal frequency division multiplexing (OFDM) to improve the reliability, quality and capacity of transmission. However, SM OFDM systems also inherit from OFDM systems the drawback of high sensitivity to carrier...
An adaptive handover algorithm for wireless communication systems is addressed in this paper. Moving from the Generalized Extended Least Square handover algorithm proposed in, we model the handover mechanism as a hybrid system, and we include it in a dynamic optimization problem which is solved through the use of a trellis diagram. It's the key segment in moving Least-Square Approximation that computing...
Equipping each node with multiple radios can substantially increase the capacity of wireless mesh networks, because in that way neighbor links can be assigned distinct channels to avoid interference. However, the aggregate network interference still may not be sufficiently reduced due to a rough channel assignment. This paper focuses on the static channel assignment issue of multi-radio multi-channel...
Most WSN routing protocols select route based on hop count. Efficient routing metric should consider both inter-flow and intra-flow interference. A new minimum route-interference routing metric for multi-radio WMN is proposed. The path which has a minimum total interference can be found by using this metric. Simulation result shows that network performance can be significantly improved with the new...
Network topology does not change dynamically in wireless mesh networks. Most of the end-to-end traffic flows are between mesh nodes and gateways. A tree-base routing algorithm is suitable for such network architecture. When using multichannel and multi-interface, routing algorithm and channel assignment is codependent. They should be combined together to fully exploit the network capacity. We propose...
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