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In this paper, we consider the balance between the energy efficiency (EE) and the short-term fairness among individual users in a muiticell MISO downlink. Firstly, the power consumption and sum proportional rate are utilized jointly to construct an objective function. Then a transmit beamformer optimization problem for the objective maximization subject to transmit power constraints is formulated...
In this paper, we focus on the problem of energy-efficient power allocation for secure transmission in massive multiple-input multiple-output (MIMO) systems, where an active multi-antennas eavesdropper sends pilot signals as that of destination receiver to transmitter simultaneously in the uplink training phase. Our aim is to maximize the energy efficiency (EE) of the system by considering the power...
In the battle of anti-air attack, the troops have to carry out the electronic jamming by integrated using of electronic measures in order to weaken the airborne Radar detection ability for the enemy. The allocation of jamming arms plays important role in influencing the jamming benefit directly. In this paper, we propose an arms allocation model for Radar jamming system based on the chaos genetic...
To guarantee the rapidly increasing applications of electrical consumer, ultra small cells have been proposed to provide high spectral efficiency. However, which are severely constrained by the inter-cell interference (ICI) when the system load is high, and the enhanced inter-cell interference coordination (eICIC) is key to improving performance. To quantify the performance gains from eICIC to the...
We investigate the coexistence issue between 802.22 and 802.11af networks over the TV White Space (TVWS). The coexistence scheme is vulnerable to selfish attacks. In this paper, the scenario of selfish attack wherein 802.22 subscribers intend to occupy the allocated spectrum selfishly is studied. Consequently, 802.11af users have less opportunity to access the spectrum, which leads to low overall...
Hierarchical Latent Dirichlet Allocation (hLDA) has achieved good results in the supervised and unsupervised multi-document hierarchical topic modeling. However, the result is diversified. The results maintain randomness even with the same parameters. Thus, this paper proposed automatic evaluation methods for unsupervised multi-document hLDA modeling results over previous studies. This paper used...
Energy harvesting is necessary to make the wireless network self-sustaining and self-organizing regardless of the traditional power grid. How to allocate the limited radio resources in the energy harvesting wireless network is a challenging work. This paper focuses on optimizing the time and power related resources in the multi-cell scenario to maximize the throughput constraining of the changeable...
Specifying the transmission rate as the indicator of system throughput, the paper proposes an improved parallel algorithm of color sensitive graph coloring principle based on allocation adjustment factor for centralized cognitive radio communication network. By using the allocation adjustment factor, the spectrum allocation can better balance the total transmission rate of the system and the allocation...
In this paper, we study energy-efficient channel aggregation problem in cognitive radio networks, where a secondary user senses multiple channels simultaneously or sequentially in the sensing period and subsequently aggregate those channels sensed free. We aim at designing the optimal sensing time and power allocation to achieve the maximum energy efficiency, meanwhile considering the maximum transmit...
For a multiuser cognitive OFDM network, most existing adaptive resource allocation methods focus solely on fixed data-rate requirement (QoS guaranteed) or variable data-rate (no QoS guaranteed) conditions without any fairness consideration. In this paper, we investigate the resource allocation problem in a heterogeneous cognitive network with different QoS requirements. By decomposing the problem...
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