Skip to content
Research Article Open access

Sum Rate Maximization Based on Joint Power Control and Beamforming in MIMO One Way AF Relay Networks

Shahriar Shirvani Moghaddam, Maryam Alibeigi

Current Journal of Applied Science and Technology · pp. 285–296 · Published 23 Oct 2014

10.9734/BJAST/2015/13115

Abstract

Aims: Joint Power control and beamforming in MIMO one way AF relay networks by obtaining beamforming weights on relay nodes through maximizing sum rate while the total power consumed in all relay nodes are not greater than the certain predefined threshold. Study Design: Comparative study by simulation in MATLAB software. Place and Duration of Study: Digital Communications Signal Processing Research Lab., Shahid Rajaee Teacher Training University, Since June 2012 to June 2014. Methodology: We consider a wireless communication network consisting of d source-destination pairs communicating in a pairwise manner via R non regenerative one way relay nodes. Our objective is maximizing sum rate supposing that the total power consumed in all relay nodes is not greater than the certain predefined threshold. It is shown that finding beamforming matrix which satisfies our goal is a non-convex problem. So, we use semidefinite relaxation technique to turn this problem into a semidefinite programming (SDP) problem. We propose two new algorithms which maximize total signal to total leakage (interference plus noise) ratio (TSTLR). Results: Simulation results show that our proposed algorithm is a low-complex algorithm and outperforms the existing total leakage minimization algorithm, named TL. In addition, the effect of the number of relays, the number of transmitter-receiver pairs, quality of uplink as well as downlink channels and imperfect channel state information (CSI) are investigated. Conclusion: The proposed method maximizes the total signal to total leakage ratio by maximizing the difference between the numerator and the denominator. It is shown that when the number of relays increases or the quality of uplink and downlink channels improves, higher sum rate can be achieved. Moreover, by increasing the number of source – destination pairs the sum rate increases, too. Also, it is shown that when uncertainty of channels increases the achievable sum rate decreases.

AF relays beamforming power control sum rate maximization

References (18)

  1. 1 Fundamentals of Wireless Communication [DOI]
  2. 2 Transmit beamforming for physical-layer multicasting [DOI]
  3. 3 1Improving Amplify-and-Forward Relay Networks: Optimal Power Allocation versus Selection
  4. 4 Quasi-maximum-likelihood multiuser detection using semi-definite relaxation with application to synchronous CDMA [DOI]
  5. 5 Complex Matrix Decomposition and Quadratic Programming [DOI]
  6. 6 Multiple Peer-to-Peer Communications Using a Network of Relays [DOI]
  7. 7 Quadratic maximization and semidefinite relaxation [DOI]
  8. 8 Cooperative Algorithms for MIMO Amplify-and-Forward Relay Networks [DOI]
  9. 9 Network Beamforming using Relays with Perfect Channel Information [DOI]
  10. 10 Impact of relay gain allocation on the performance of cooperative diversity networks [DOI]
  11. 11 Optimal Power Allocation in Multi-Relay MIMO Cooperative Networks: Theory and Algorithms [DOI]
  12. 12 Interference MIMO Relay Channel: Joint Power Control and Transceiver-Relay Beamforming [DOI]
  13. 13 Joint source and relay optimization for parallel MIMO relay networks [DOI]
  14. 14 Joint Power Allocation and Beamforming for Cooperative Networks [DOI]
  15. 15 Joint power control and beamforming for interference MIMO relay channel [DOI]
  16. 16 Relay Power Minimization Approach Based on General-Rank Beamforming for Multi-Antenna Relaying Schemes [DOI]
  17. 17 Wireless communications [DOI]
  18. 18 Low complexity sum rate maximization for single and multiple stream MIMO AF relay networks [DOI]

Cited by 4

Sum-Rate Optimization Constrained by Consumed Power for Multi- Antenna Non-Regenerative Relay Network

Maryam Alibeigi, Shahriar S. Moghaddam · International Journal of Sensors, Wireless Communications and Control · 2020

Joint power control and beamforming in MIMO relays

Shahriar Shirvani Moghaddam, Maryam Alibeigi · COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering · 2016

Showing 2 of 4 known citations — external sources report more than can currently be individually listed.

Related research

Article metrics

Real usage data collected on this platform.

44

Page views

0

PDF downloads

30

Outbound clicks

4

Citations

Views over time

Views by country

Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".

Traffic sources

Referring site, by host.

Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.