Abstract
In recent years, physical layer security has been regarded as a promising concept to provide secure communications in next generation mobile systems, where theoretically massive MIMO can significantly enhance the system secrecy performance due to its advantage in shaping the transmitted signals to null the interference or leakage. However, in practical systems, the channel state information is often imperfect due to the outdated channel effect and the channel estimation error. In this paper, we investigate the physical layer security problem in a multi-user massive MIMO system under imperfect CSI. We first derive a tight asymptotic lower bound of the ergodic system secrecy capacity under imperfect CSI, and then analyze how imperfect CSI affects the system secrecy performance. Simulation results reveal the negative impact of the imperfect CSI on the secrecy performance of massive MIMO systems and the accuracy of our theoretical derivations and analysis.
| Original language | English |
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| Title of host publication | 2018 IEEE International Conference on Communications, ICC 2018 - Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Print) | 9781538631805 |
| DOIs | |
| Publication status | Published - 27 Jul 2018 |
| Externally published | Yes |
| Event | 2018 IEEE International Conference on Communications, ICC 2018 - Kansas City, United States Duration: 20 May 2018 → 24 May 2018 |
Publication series
| Name | IEEE International Conference on Communications |
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| Volume | 2018-May |
| ISSN (Print) | 1550-3607 |
Conference
| Conference | 2018 IEEE International Conference on Communications, ICC 2018 |
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| Country/Territory | United States |
| City | Kansas City |
| Period | 20/05/18 → 24/05/18 |
Bibliographical note
Publisher Copyright:© 2018 IEEE.
Keywords
- Imperfect CSI
- Massive MIMO
- Physical layer security
- Secrecy capacity