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The development on the underwater communication network for sea observation is on the rise due to increasing importance of its applications such as oceanography, marine commercial operation and military surveillance. In this paper, we design the system-level simulator (SLS) architecture for the underwater acoustic communications which can be the basis for the design model of future application-specific...
Spectrum sharing between heterogeneous systems - such as cellular systems, radars, and satellites - is an emerging area of research as it promises to solve the looming spectrum congestion problem. Spectrum regulators and technical specification bodies are contemplating over the idea of allowing commercial wireless systems to be deployed in satellite bands on a sharing basis. In the United States,...
In this paper, we study the joint price and power allocation in spectrum sharing macro-femtocell networks. The proposed game theoretic framework is based on bi-level Stackelberg game where macro base station (MBS) works as a leader and underlaid femto base stations (FBSs) work as followers. MBS has fixed data rate and imposes interference price on FBSs for maintaining its data rate and earns revenue...
Todays wireless networks are mostly dominated by multimedia content, which poses much pressure on the macrocell networks. In such a case, underlaid small cells deployment is considered promising to off-load the traffic from the overburdened macrocell network and meet the applications' quality of service (QoS). However, the interference management among dense deployment of small cells remains a technical...
With recent breakthroughs in full-duplex radio, there is a growing trend to combine it with cognitive radio. Thus the topic of spectrum sensing in full-duplex scenario is addressed in this paper. Firstly, the concept of full-duplex spectrum sensing and its advantage over traditional half-duplex spectrum sensing are analyzed. Then a correlation based least square algorithm is formulated to cancel out...
Unrelenting demand of mobile data can be met by intensive spectrum and spatial reuse which can be achieved by femtocells and multi-stream MIMO transmission. However, random deployment of femtocells may cause severe co-channel interference (CCI). In this paper we propose an algorithm, where femto base stations form a cluster and cooperatively generate precoding matrix for interference mitigation to...
Two-tier femtocell network is considered a promising solution for the rapidly rising mobile data rate demand due to its high spectrum efficiency. However, underlaying femtocells with macrocells will result in co-channel interference (CCI) which severely deteriorates network performance. Therefore, optimized power control is required in femtocell network to avoid such interference. Additionally, energy...
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