| Presentation | 2021-10-22 Study on Performance Improvement of Radio-Wave Encrypted Modulation by LLR Clipping Mamoru Okumura, Keisuke Asano, Takumi Abe, Eiji Okamoto, Tetsuya Yamamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In recent years, physical layer security technologies that encrypt the physical layer using information theory have attracted much attention. As one of them, we have proposed a chaos modulation that has both physical layer security and channel coding effects. However, the chaos modulation is a kind of Gaussian modulation, and has a problem that the accuracy of log-likelihood ratio (LLR) approximated by Max-log is degraded in worse channel environments, because it does not use a fixed constellation mapping and the distance between signal points is not constant. As a result, existing LLR calculation methods suffer from the performance degradation due to error propagation in turbo decoding. To tackle this problem, in this paper, we propose a new LLR clipping method that can be optimally applied to chaos modulation by limiting the confidence level of LLR and suppressing error propagation. This method improves the performance of turbo decoding. Numerical results show that the proposed method achieves the same performance as the one using the exact LLR. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | radio-wave encryption / chaos modulation / physical layer security / LLR clipping / multiple-input multiple-output |
| Paper # | RCS2021-137 |
| Date of Issue | 2021-10-14 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2021/10/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) |
| Secretary | Toshihiko Nishimura(NEC) / Tomoya Tandai(Panasonic) / Fumihide Kojima |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on Performance Improvement of Radio-Wave Encrypted Modulation by LLR Clipping |
| Sub Title (in English) | |
| Keyword(1) | radio-wave encryption |
| Keyword(2) | chaos modulation |
| Keyword(3) | physical layer security |
| Keyword(4) | LLR clipping |
| Keyword(5) | multiple-input multiple-output |
| 1st Author's Name | Mamoru Okumura |
| 1st Author's Affiliation | Nagoya Institute of Technology(NIT) |
| 2nd Author's Name | Keisuke Asano |
| 2nd Author's Affiliation | Nagoya Institute of Technology(NIT) |
| 3rd Author's Name | Takumi Abe |
| 3rd Author's Affiliation | Nagoya Institute of Technology(NIT) |
| 4th Author's Name | Eiji Okamoto |
| 4th Author's Affiliation | Nagoya Institute of Technology(NIT) |
| 5th Author's Name | Tetsuya Yamamoto |
| 5th Author's Affiliation | Panasonic Cooperation(Panasonic) |
| Date | 2021-10-22 |
| Paper # | RCS2021-137 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-210 |
| Page | pp.pp.100-105(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-10-14 (RCS) |