Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive Antennas
This paper considers the scenario where multiple source nodes communicate with multiple destination nodes simultaneously with the aid of an amplify-and-forward relay equipped with massive antennas. In order to achieve optimal energy efficiency (EE) of the entire relay system, this paper investigates...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2014/543826 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850176760508841984 |
|---|---|
| author | Long Zhao Wei Xiang Jie Mei Hui Zhao Hang Long Lin Li |
| author_facet | Long Zhao Wei Xiang Jie Mei Hui Zhao Hang Long Lin Li |
| author_sort | Long Zhao |
| collection | DOAJ |
| description | This paper considers the scenario where multiple source nodes communicate with multiple destination nodes simultaneously with the aid of an amplify-and-forward relay equipped with massive antennas. In order to achieve optimal energy efficiency (EE) of the entire relay system, this paper investigates the power allocation problem for the multiple pairs of nodes at both the source nodes and the relay node, where the relay employs the backward and forward zero-forcing filters. Since the EE optimization problem cannot be solved analytically, we propose a two-phase power allocation method. Given power allocation of one phase, the optimal power allocation is derived for the other phase. Furthermore, two dual-iteration power allocation (DIPA) algorithms with performance approaching that of optimal EE are developed based on the instantaneous and statistic channel state information, respectively. Numerical results show that the proposed DIPA algorithms can greatly improve EE while guaranteeing spectrum efficiency (SE) when compared with the equal power allocation algorithm. Moreover, both algorithms suggest that deploying a rational number of antennas at the relay node and multiplexing a reasonable number of node pairs can improve on the EE and SE. |
| format | Article |
| id | doaj-art-b8b2f5974bab4cc6af14b8dea63ff5f7 |
| institution | OA Journals |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-b8b2f5974bab4cc6af14b8dea63ff5f72025-08-20T02:19:11ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772014-01-01201410.1155/2014/543826543826Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive AntennasLong Zhao0Wei Xiang1Jie Mei2Hui Zhao3Hang Long4Lin Li5Wireless Signal Processing & Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, ChinaSchool of Mechanical and Electrical Engineering, University of Southern Queensland, Toowoomba, QLD 4350, AustraliaWireless Signal Processing & Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, ChinaWireless Signal Processing & Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, ChinaWireless Signal Processing & Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, ChinaWireless Signal Processing & Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, ChinaThis paper considers the scenario where multiple source nodes communicate with multiple destination nodes simultaneously with the aid of an amplify-and-forward relay equipped with massive antennas. In order to achieve optimal energy efficiency (EE) of the entire relay system, this paper investigates the power allocation problem for the multiple pairs of nodes at both the source nodes and the relay node, where the relay employs the backward and forward zero-forcing filters. Since the EE optimization problem cannot be solved analytically, we propose a two-phase power allocation method. Given power allocation of one phase, the optimal power allocation is derived for the other phase. Furthermore, two dual-iteration power allocation (DIPA) algorithms with performance approaching that of optimal EE are developed based on the instantaneous and statistic channel state information, respectively. Numerical results show that the proposed DIPA algorithms can greatly improve EE while guaranteeing spectrum efficiency (SE) when compared with the equal power allocation algorithm. Moreover, both algorithms suggest that deploying a rational number of antennas at the relay node and multiplexing a reasonable number of node pairs can improve on the EE and SE.http://dx.doi.org/10.1155/2014/543826 |
| spellingShingle | Long Zhao Wei Xiang Jie Mei Hui Zhao Hang Long Lin Li Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive Antennas International Journal of Antennas and Propagation |
| title | Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive Antennas |
| title_full | Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive Antennas |
| title_fullStr | Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive Antennas |
| title_full_unstemmed | Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive Antennas |
| title_short | Energy-Efficient Dual-Iteration Power Allocation for Two-Phase Relay System with Massive Antennas |
| title_sort | energy efficient dual iteration power allocation for two phase relay system with massive antennas |
| url | http://dx.doi.org/10.1155/2014/543826 |
| work_keys_str_mv | AT longzhao energyefficientdualiterationpowerallocationfortwophaserelaysystemwithmassiveantennas AT weixiang energyefficientdualiterationpowerallocationfortwophaserelaysystemwithmassiveantennas AT jiemei energyefficientdualiterationpowerallocationfortwophaserelaysystemwithmassiveantennas AT huizhao energyefficientdualiterationpowerallocationfortwophaserelaysystemwithmassiveantennas AT hanglong energyefficientdualiterationpowerallocationfortwophaserelaysystemwithmassiveantennas AT linli energyefficientdualiterationpowerallocationfortwophaserelaysystemwithmassiveantennas |