Secure Simultaneous Information and Power Transfer for Downlink Multi-user Massive MIMO
| Autor: | S. Mohammad Razavizadeh, Hamed Farhadi, Tommy Svensson, Zahra Goli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
FOS: Computer and information sciences
General Computer Science Computer science Computer Science - Information Theory MIMO Data_CODINGANDINFORMATIONTHEORY Multi-user Upper and lower bounds Base station energy harvesting (EH) Telecommunications link massive MIMO General Materials Science power splitting (PS) Secure transmission Computer Science::Cryptography and Security Computer Science::Information Theory business.industry Information Theory (cs.IT) General Engineering Physical layer physical layer security non-linear energy harvesting (EH) Active eavesdropper lcsh:Electrical engineering. Electronics. Nuclear engineering business lcsh:TK1-9971 Decoding methods Communication channel Computer network |
| Zdroj: | IEEE Access, Vol 8, Pp 150514-150526 (2020) |
| Popis: | In this article, downlink secure transmission in simultaneous information and power transfer (SWIPT) system enabled with massive multiple-input multiple-output (MIMO) is studied. A base station (BS) with a large number of antennas transmits energy and information signals to its intended users, but these signals are also received by an active eavesdropper. The users and eavesdropper employ a power splitting technique to simultaneously decode information and harvest energy. Massive MIMO helps the BS to focus energy to the users and prevent information leakage to the eavesdropper. The harvested energy by each user is employed for decoding information and transmitting uplink pilot signals for channel estimation. It is assumed that the active eavesdropper also harvests energy in the downlink and then contributes during the uplink training phase. Achievable secrecy rate is considered as the performance criterion and a closed-form lower bound for it is derived. To provide secure transmission, the achievable secrecy rate is then maximized through an optimization problem with constraints on the minimum harvested energy by the user and the maximum harvested energy by the eavesdropper. Numerical results show the effectiveness of using massive MIMO in providing physical layer security in SWIPT systems and also show that our closed-form expressions for the secrecy rate are accurate. |
| Databáze: | OpenAIRE |
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