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Paper Abstract and Keywords
Presentation 2018-02-28 09:40
Wireless Physical Layer Security Schemes Using Random Phases for MIMO-OFDM Communications and Its Security Rate Analysis
Tsuyoshi Yoneda, Kazuhiko Fukawa, Yuyuan Chang (Tokyo Tech)
Abstract (in Japanese) (See Japanese page) 
(in English) As conventional physical layer security schemes for multiple-input single-output (MISO) wireless communications, the artificial noise (AN) and artificial fast fading (AFF) schemes assume
that channel state information (CSI) is known to transmitters. To prevent eavesdroppers from receiving desired signals that legitimate users should correctly receive,
the AN scheme transmits AN in addition to the desired signals while the AFF scheme does not consider transmit power levels and
multiplies transmit signals by random weights. The AN and random weights can deteriorate transmission performance of the eavesdroppers.
However, the AN and AFF schemes have a major drawback that they require a large amount of transmit power.
To cope with such a problem, the proposed scheme called the random phase (RP) avoids transmitting AN. Instead of AN, RP randomly changes
phases of the transmit signals, and controls amplitudes of the transmit signals so that the transmit power can
be minimized under the constraint that the legitimate user should correctly receive the desired signals.
This report extends RP from MISO to multiple-input multiple-output (MIMO) communications, and analyzes security rates of the conventional and proposed schemes
on the assumption that the eavesdropper performs blind estimation of the equivalent channel frequency response matrix. Then, we conduct computer simulations of MIMO-OFDM
under multipath fading conditions with OFDM subcarrier modulation being 16QAM. It is demonstrated that the proposed scheme can degrade
bit error rates (BERs) of the eavesdropper and can improve the secrecy rate more than the AN and AFF schemes while reducing
the transmit power more drastically.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO-OFDM wireless communications / physical layer security / random phase / security rate / transmit power / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 456, RCS2017-327, pp. 57-62, Feb. 2018.
Paper # RCS2017-327 
Date of Issue 2018-02-21 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee RCS SR SRW  
Conference Date 2018-02-28 - 2018-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2018-02-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Wireless Physical Layer Security Schemes Using Random Phases for MIMO-OFDM Communications and Its Security Rate Analysis 
Sub Title (in English)  
Keyword(1) MIMO-OFDM wireless communications  
Keyword(2) physical layer security  
Keyword(3) random phase  
Keyword(4) security rate  
Keyword(5) transmit power  
1st Author's Name Tsuyoshi Yoneda  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Kazuhiko Fukawa  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Yuyuan Chang  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Date Time 2018-02-28 09:40:00 
Presentation Time 20 
Registration for RCS 
Paper # IEICE-RCS2017-327 
Volume (vol) IEICE-117 
Number (no) no.456 
Page pp.57-62 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2018-02-21 

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