2023 Fiscal Year Research-status Report
Design and Optimization of Probabilistic Constellation Shaping for Physical Layer Security in Visible Light Communication
| Project/Area Number |
23K13333
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2023-04-01 – 2025-03-31
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| Keywords | VLC / Physical layer security / Constellation shaping / Energy efficiency |
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| Outline of Annual Research Achievements |
In the first year of the research project, we studied the designs of probablistic constellation shaping (PCS) for enhacing the performance of physical layer security (PLS) in visible light communications (VLC). We also investigated the problem of energy effiency in the context of PLS in VLC systems.
1. For single-input single-output (SISO) VLC systems, we proposed a PCS scheme for pulse amplitude modulation (PAM) that maximizes the secrecy capacity while ensuring the reliability of the channel of the legitimate user.
2. For multiple-input single-output (MISO) VLC systems with the same objectives mentiond in the SISO case, we proposed a joint design of PCS and precoding.
3. For MISO VLC systems, we proposed several precoding and aritificial noise schemes to maximize the energy efficiency.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The progress of the first year is smoothier than initialy planned as not only we addressed the design of PCS for performance improvement of PLS but also the design of precoding and artifical noise for enhancing the energy efficiency in the context of PLS.
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| Strategy for Future Research Activity |
In the second year of the research project, we plan to investigate the design of PCS schemes to improve the energy efficency of PLS in VLC systems. In particular, we aim to tackle the following two problems.
1. The optimal probabilistic constellation for the case of SISO systems and the optimal joint probabilistic constellation and precoding for the case of MISO systems.
2. We consider a hybrid VLC/RF (radio frequency) system where VLC is used for the downlink whereas RF is used for the uplink. We then study the energy efficiency of such a system considering the constraint imposed by PLS on the uplink.
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| Causes of Carryover |
There are two reasons for incurring amount to be used in the next fiscal year. Firstly, the purchase of new research equiment was not necesarry in the first year since the equipment of the lab is already enough for the current number of students. Secondly, the payment of publication fee was not high since several papers are not under review.
In the next fiscal year, the incurring amount will be used to purchase research equipment for new coming students and pay the publication fee of several papers which are currently under review.
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