Securing Massive MIMO Systems: Secrecy for Free With Low-Complexity Architectures

Autor:	H. Vincent Poor, Ali Bereyhi, Saba Asaad, Rafael F. Schaefer, Ralf R. Muller, Georg Fischer
Rok vydání:	2021
Předmět:	Beamforming Computer science Applied Mathematics Transmitter MIMO Eavesdropping Data_CODINGANDINFORMATIONTHEORY Topology Precoding Computer Science Applications Information leakage Benchmark (computing) Electrical and Electronic Engineering Antenna (radio) Computer Science::Information Theory
Zdroj:	IEEE Transactions on Wireless Communications. 20:5831-5845
ISSN:	1558-2248 1536-1276
Popis:	Passively overheard massive multiple-input multiple-output (MIMO) settings are capable of suppressing eavesdroppers via narrow beamforming towards legitimate receivers. This implies that secrecy is obtained almost for free in these settings. This study shows that this is a valid property for a large class of low-complexity massive MIMO transmitters. The investigations consider two dominant approaches for complexity reduction, namely antenna selection and hybrid analog-digital precoding . It is shown that using either approach, the information leakage per achievable sum-rate vanishes as the number of transmit antennas grows large. The results demonstrate that, as the transmit array size grows large, the normalized information leakage obtained by antenna selection and hybrid analog-digital precoding converges to zero double-logarithmically and logarithmically , respectively. The analytical results are confirmed for various benchmark architectures via numerical simulations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::94e29703ecbc117d14324de4f4ef1ba0 https://doi.org/10.1109/twc.2021.3070529 Zobrazit plný text záznamu