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This paper considers a joint subcarrier and power allocation in an orthogonal frequency division multiple access (OFDMA) cellular system with base station (BS) cooperation. The problem is formulated as an average utility maximization subject to the per-antenna power constraint. Existing algorithms to solve similar problem in a single-sell system are shown not so efficient in the cooperative multi-cell...
In recent years, wireless mesh networks (WMNs) have been widely deployed to provide wireless access to the Internet. However, due to inter-link interference, the aggregated capacity of WMNs is limited, even with multiple channels. As a result, many links in WMNs are suppressed since interfering links cannot be active (i.e., transmitting packets) simultaneously. In this paper, we propose a joint design...
In ad hoc networks, reducing energy consumption and improving throughput are both important for high network performance. This paper presents a joint power and rate control adaptive algorithm to optimize the trade-off between power consumption and throughput in ad hoc networks. Each node chooses its own transmission power and rate based on limited environment information in order to achieve optimal...
This paper aims to investigate an efficient power allocation algorithm for multiuser orthogonal frequency division multiplexing (MU-OFDM) cognitive radio (CR) systems that uses the peak power constraint to protect the primary users. Under this constraint, the high-complexity optimal power allocation algorithm for OFDM-based CR systems is not suited to determine the power distribution because the algorithm...
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