Heterogeneous networks provide flexible deployments for operators to improve spectrum
efficiency and increase coverage. However, driven by new generation wireless devices, the …

This paper investigates the energy efficiency (EE) in multiple relay-aided OFDM systems,
where decode-and-forward (DF) relay beamforming is employed to help the information …

In this paper, we maximize the energy efficiency (EE) of full-duplex (FD) two-way relay
(TWR) systems under non-ideal power amplifiers (PAs) and non-negligible transmission …

In this paper, we review radio resource optimization methods for energy-efficient wireless
communication in links and networks using the Orthogonal Frequency Division Multiplexing …

This paper considers the joint design of user power allocation and relay beamforming in
relaying communications, in which multiple pairs of single-antenna users exchange …

The device-to-device (D2D)-relay mechanism, which works by integrating D2D
communications with relay technology, is promising in the future networks. The user pairing …

In this paper, we investigate utility-based joint subcarrier and power allocation algorithms for
improving the energy efficiency (EE) in multi-user two-way regenerative relay networks. With …

We propose a power-efficient transmission scheme for wireless sensor networks. In this
scheme, the sensor nodes compress their corresponding source-relay channel state …

In a traditional wireless transmission system, studies about energy efficiency (EE) are
usually for a fixed transmission mode. In this paper, we propose an adaptive wireless …

This paper studies a power minimization problem of an orthogonal frequency-division
multiplexing modulated two-way amplify-and-forward relay wireless sensor network (WSN) …