Tang, J;
So, DKC;
Zhao, N;
Shojaeifard, A;
Wong, KK;
(2018)
Energy Efficiency Optimization with SWIPT in MIMO Broadcast Channels for Internet of Things.
IEEE Internet of Things Journal
, 5
(4)
pp. 2605-2619.
10.1109/JIOT.2017.2785861.
Preview |
Text
IoT Journal.pdf - Accepted Version Download (468kB) | Preview |
Abstract
IEEE Simultaneous wireless information and power transfer (SWIPT) is anticipated to have great applications in fifth-generation (5G) communication systems and the Internet-of-Things (IoT). In this paper, we address the energy efficiency (EE) optimization problem for SWIPT multiple-input multiple-output broadcast channel (MIMO-BC) with time-switching (TS) receiver design. Our aim is to maximize the EE of the system whilst satisfying certain constraints in terms of maximum transmit power and minimum harvested energy per user. The coupling of the optimization variables, namely, transmit covariance matrices and TS ratios, leads to an EE problem which is non-convex, and hence very difficult to solve directly. Hence, we transform the original maximization problem with multiple constraints into a suboptimal min-max problem with a single constraint and multiple auxiliary variables. We propose a dual inner/outer layer resource allocation framework to tackle the problem. For the inner-layer, we invoke an extended SWIPT-based BC-multiple access channel (MAC) duality approach and provide two iterative resource allocation schemes under fixed auxiliary variables for solving the dual MAC problem. A sub-gradient searching scheme is then proposed for the outer-layer in order to obtain the optimal auxiliary variables. Numerical results confirm the effectiveness of the proposed algorithms and illustrate that significant performance gain in terms of EE can be achieved by adopting the proposed extended BC-MAC duality-based algorithm.
| Type: | Article |
|---|---|
| Title: | Energy Efficiency Optimization with SWIPT in MIMO Broadcast Channels for Internet of Things |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JIOT.2017.2785861 |
| Publisher version: | https://doi.org/10.1109/JIOT.2017.2785861 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Simultaneous wireless information and power transfer (SWIPT), energy efficiency (EE), multiple-input multiple-output (MIMO), Internet-of-Things (IoT). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10044520 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
