Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels
Recent developments in visible light communications (VLC) have focused on enhancing its security and privacy. This paper studies the physical layer security in VLC networks with multiple users when there is a single wiretap eavesdropper. In particular, our aim is to design the optimal artificial noi...
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8587165/ |
| _version_ | 1818913160788180992 |
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| author | Thanh V. Pham Takafumi Hayashi Anh T. Pham |
| author_facet | Thanh V. Pham Takafumi Hayashi Anh T. Pham |
| author_sort | Thanh V. Pham |
| collection | DOAJ |
| description | Recent developments in visible light communications (VLC) have focused on enhancing its security and privacy. This paper studies the physical layer security in VLC networks with multiple users when there is a single wiretap eavesdropper. In particular, our aim is to design the optimal artificial noise (AN)-aided precoding scheme to improve the secrecy performance in terms of legitimate users and eavesdropper’s signal-to-interference-plus-noise ratios (SINRs). The purpose of our AN-aided precoding design is to ensure a fairness of the legitimate users’ SINRs while impairing the quality of eavesdropper’s channel as much as possible. Depending on the availability of the eavesdropper’s channel state information (CSI) at the transmitters, there are generally two design strategies. When the eavesdropper’s CSI is unknown to the transmitters (i.e., passive eavesdropper), the AN is constructed to be orthogonal to the users’ aggregate channel matrix. In case the eavesdropper’s CSI is available (i.e., active eavesdropper), the AN design strategy is to keep the SINR of the eavesdropper below a certain predefined threshold. Aside from the general design, we also study a specific design with the zero-forcing (ZF) technique and compare its performance with that of the general design. In both designs, numerical results show that significant gaps between users’ and eavesdropper’s SINR can always be achieved, thus guaranteeing a high secrecy performance. It is also observed that while the general design outperforms the ZF one in terms of the users’ SINRs, it does not result in lower eavesdropper’s SINRs compared to the ZF design, especially in the low transmit power region. |
| first_indexed | 2024-12-19T23:26:05Z |
| format | Article |
| id | doaj.art-c7229073c9d6458a951bbf3f578eeb87 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-19T23:26:05Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-c7229073c9d6458a951bbf3f578eeb872022-12-21T20:01:52ZengIEEEIEEE Access2169-35362019-01-0173767377710.1109/ACCESS.2018.28891198587165Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication ChannelsThanh V. Pham0https://orcid.org/0000-0002-7228-3172Takafumi Hayashi1Anh T. Pham2https://orcid.org/0000-0002-5143-1498Computer Communications Laboratory, The University of Aizu, Aizuwakamatsu, JapanDepartment of Information Engineering, Niigata University, Niigata, JapanComputer Communications Laboratory, The University of Aizu, Aizuwakamatsu, JapanRecent developments in visible light communications (VLC) have focused on enhancing its security and privacy. This paper studies the physical layer security in VLC networks with multiple users when there is a single wiretap eavesdropper. In particular, our aim is to design the optimal artificial noise (AN)-aided precoding scheme to improve the secrecy performance in terms of legitimate users and eavesdropper’s signal-to-interference-plus-noise ratios (SINRs). The purpose of our AN-aided precoding design is to ensure a fairness of the legitimate users’ SINRs while impairing the quality of eavesdropper’s channel as much as possible. Depending on the availability of the eavesdropper’s channel state information (CSI) at the transmitters, there are generally two design strategies. When the eavesdropper’s CSI is unknown to the transmitters (i.e., passive eavesdropper), the AN is constructed to be orthogonal to the users’ aggregate channel matrix. In case the eavesdropper’s CSI is available (i.e., active eavesdropper), the AN design strategy is to keep the SINR of the eavesdropper below a certain predefined threshold. Aside from the general design, we also study a specific design with the zero-forcing (ZF) technique and compare its performance with that of the general design. In both designs, numerical results show that significant gaps between users’ and eavesdropper’s SINR can always be achieved, thus guaranteeing a high secrecy performance. It is also observed that while the general design outperforms the ZF one in terms of the users’ SINRs, it does not result in lower eavesdropper’s SINRs compared to the ZF design, especially in the low transmit power region.https://ieeexplore.ieee.org/document/8587165/VLC wiretap channelphysical layer securityartificial noise-aided precodingzero-forcing precoding |
| spellingShingle | Thanh V. Pham Takafumi Hayashi Anh T. Pham Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels IEEE Access VLC wiretap channel physical layer security artificial noise-aided precoding zero-forcing precoding |
| title | Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels |
| title_full | Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels |
| title_fullStr | Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels |
| title_full_unstemmed | Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels |
| title_short | Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels |
| title_sort | artificial noise aided precoding design for multi user visible light communication channels |
| topic | VLC wiretap channel physical layer security artificial noise-aided precoding zero-forcing precoding |
| url | https://ieeexplore.ieee.org/document/8587165/ |
| work_keys_str_mv | AT thanhvpham artificialnoiseaidedprecodingdesignformultiuservisiblelightcommunicationchannels AT takafumihayashi artificialnoiseaidedprecodingdesignformultiuservisiblelightcommunicationchannels AT anhtpham artificialnoiseaidedprecodingdesignformultiuservisiblelightcommunicationchannels |