Multi-Antenna Relay Aided Wireless Physical Layer Security

作者：Chen, Xiaoming^*; Zhong, Caijun; Yuen, Chau; Chen, Hsiao-Hwa

来源：IEEE Communications Magazine, 2015, 53(12): 40-+.

DOI：10.1109/MCOM.2015.7355564

• POWER ALLOCATION
• SECRECY CAPACITY

With the growing popularity of mobile Internet, providing secure wireless services has become a critical issue. Physical layer security (PHY-security) has been recognized as an effective means to enhance wireless security by exploiting wireless medium characteristics, for example, fading, noise, and interference. A particularly interesting PHY-security technology is cooperative relay due to the fact that it helps to provide distributed diversity and shorten access distance. This article offers a tutorial on various multi-antenna relaying technologies to improve security at physical layer. The state-of-the-art research results on multi-antenna relay aided PHY-security as well as some secrecy performance optimization schemes are presented. In particular, we focus on large-scale MIMO relaying technology, which is effective in tackling various challenging issues for implementing wireless PHY-security, such as short-distance interception without eavesdropper CSI and with imperfect legitimate CSI. Moreover, the future directions are identified for further enhancement of secrecy performance.

• 出版日期2015-12
• 单位南京航空航天大学; 浙江大学