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In this paper, a novel signal-to-clipping noise ratio and least squares approximation tone reservation scheme (SCR-LSA TR) is proposed to reduce the peak-to-average power ratio for orthogonal frequency division multiplexing systems. During the SCR procedure, only the element with the maximal amplitude is picked for processing, which not only decreases the algorithm complexity, but also helps to overcome...
In this paper, an improved Susceptible- Infected-Susceptible (SIS) epidemic spreading model is proposed in order to provide a theoretical method to analyze and predict the spreading of diseases. This model is based on the following ideas: in social networks, the contact probability between nodes is decided by their social distances and their active degrees. The contact probability of two indirectly...
Affected by the path loss, Doppler frequency shift and the inter cell interferences and other factors, cell edge users were scheduled with less carriers, and had poor receiving effects. In order to improve the transmission capacity of cell edge users, we proposed a resource reserved Proportional Fair resource allocation algorithm with power allocation for the LTE-Advanced system. The users were grouped...
In this paper, we present an improved SIS propagation model based on social contact probability on social networks. On social networks, the contact probability between nodes is decided by their social active degree and their social distance; the contact probability of two directly connected nodes is usually less than 1; if two nodes are not directly connected, the contact probability of two nodes...
The abstract physical analysis and the complex differential equations always make our students feel dull to the dynamic circuit study. We need a new method to change the traditional blackboard-and-text teaching. Multisim is such a practical and convenient simulation platform that can assist us to carry out this reform. With this software, we can not only strengthen our dynamic circuit theory analysis,...
Adaptive resource allocation is an active study direction for OFDMA systems, which needs to satisfy both high spectrum utilization and QoS requirements in wireless channel environment. Proportionality fairness resource allocation algorithms were studied to keep user fairness while optimizing system capacity as possible. Simulation results show that under the proportional rate constraints, after the...
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