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In this paper, a method is suggested for the anomaly detection in wireless networks. The main problem that is addressed is to detect the malfunctioning sub-graphs in the network which bring about anomalies with block sparse structure. The proposed algorithm is detecting the anomalies considering the low-rank property of the data matrix and the block-sparsity of the outlier. Hence, the problem boils...
We first address a sum-rate maximization problem under a sum-power constraint. By introducing the concept of virtual user, we solve the problem by using the Lagrange dual method. We then look into a sum-power minimization problem under sum-rate constraints. The Lagrange dual method and an exhaustive search method are proposed, which achieve similar performance, but the former has a lower complexity...
Relay transmission has been incorporated in the 3rd Generation Partnership Project (3GPP) for Long-Term Evolution (LTE) Enhancements (LTE-Advanced, or LTE-A). To effectively harvest the performance gain introduced by the relay transmission, wireless network coding techniques can be adopted. In this paper, using a simple three-node cooperative relay channel model, based on the decode-and-forward protocol,...
Average and outage capacities for nonidentical two-user opportunistic scheduling for wireless network coding (OWNC) are derived in this paper. Nonidentical user case represents a more realistic scenario in which two users have different average signal-to-noise ratio (SNR). Our derived analytical results corroborate with the simulation results in the performance evaluation of OWNC. Insight on the performance...
This paper provides an analytical formulation of average capacity and outage capacity for two-user opportunistic scheduling for wireless network coding (OWNC). It is shown that our derived capacity formulas can be easily evaluated without numerical integration and match exactly with the simulation results. At high SNR, it is shown that the average capacity of OWNC is double of logarithm (base 2) of...
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