Name
Title | ||
|---|---|---|
Transmit power minimization beamforming via amplify-and-forward relays in wireless networks with multiple eavesdroppers |
Abstract | ||
|---|---|---|
In this paper, we consider the collaborative use of amplify-and-forward relays to form a beamforming system and provide physical layer security for a wireless network with multiple eavesdroppers. In this paper, we investigate the relay transmit power minimization under a secrecy rate constraint via secure beamforming. To minimize the relay transmit power, we design an approximate relay power minimization (RPM) beam-forming scheme, in which an iterative algorithm combining the semidefinite relaxation (SDR) technology and the gradient-based method is devised by studying the convexity of the RPM problem. By relaxing the constraints of the RPM problem, we propose a virtual eavesdropper based RPM (VE-RPM) beamforming scheme, which transforms the multivariate RPM problem into a problem of a single variable, and thus obtain an analytical solution. Our proposed beamforming designs can work well even if the number of eavesdroppers is larger than that of relays, while the existing schemes, e.g, the null-space beamforming approaches, can not work under this condition. Simulation results are presented to demonstrate the performance improvement with the RPM beamforming schemes. It is also showed that the virtual eavesdropper approaches significantly reduce the complexity with acceptable performance degradation. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/ICC.2014.6884063 | ICC |
Keywords | Field | DocType |
power minimization beamforming,secure beamforming,secrecy rate constraint,multivariate rpm problem,null-space beamforming,amplify-and-forward relays,beamforming designs,ve-rpm beamforming scheme,communication complexity,virtual eavesdropper approaches,wireless networks,array signal processing,performance degradation,radio networks,beamforming system,gradient methods,relay transmit power minimization,telecommunication security,amplify and forward communication,semidefinite relaxation technology,physical layer security,gradient-based method | WSDMA,Beamforming,Wireless network,Transmitter power output,Computer science,Iterative method,Real-time computing,Physical layer,Relay,Performance improvement | Conference |
ISSN | Citations | PageRank |
1550-3607 | 1 | 0.34 |
References | Authors | |
8 | 5 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Zhongjian Liu | 1 | 3 | 1.05 |
| Chen Chen | 2 | 440 | 57.36 |
| Lin Bai | 3 | 265 | 53.37 |
| Haige Xiang | 4 | 154 | 30.35 |
| Jinho Choi | 5 | 1642 | 206.06 |