| Presentation | 2021-06-25 Study of the Effect on Soft-decision Decoding of the Coherent M-QAM using Multi-stage symbol Placement Retention Masking Keiji Shimada, Masahiro Misumi, Takahiro Kodama, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In recent digital coherent optical communication systems, to keep data highly confidential, research is being conducted on a shared key cryptosystem in the physical layer without relying only on encryption performed in the upper layer. In this research, we propose an approach to multi-stage in the digital domain regarding the symbol placement retention masking method. The data symbol itself is regularly changed according to the bit of the encryption key. Regarding the proposed method, for an eavesdropper who does not have a shared key to confirm the signal quality deterioration associated with the multi-stage symbol arrangement holding mask method, the BER characteristics were evaluated by hard decision-based decoding. In addition, assuming a case where an eavesdropper who does not have a shared key attempts soft decision-based decryption, we assessed how much the amount of information could be reduced as an index of cipher strength using GMI. Keywords Optical coherent communication, digital signal processing, quadrature amplitude modulation, common key cryptography. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical coherent communication / digital signal processing / quadrature amplitude modulation / common key cryptography |
| Paper # | OCS2021-8 |
| Date of Issue | 2021-06-17 (OCS) |
| Conference Information | |
| Committee | PN / NS / OCS |
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| Conference Date | 2021/6/24(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Hideaki Furukawa(KDDI Research) / Akihiro Nakao(Univ. of Tokyo) / Takeshi Hoshida(Fujitsu) |
| Vice Chair | Kohei Shiomoto(Tokyo City Univ.) / Ryuichi Sugizaki(Furukawa Electric) / Noboru Yoshikane(KDDI Research) / Tetsuya Oishi(NTT) |
| Secretary | Kohei Shiomoto(NTT) / Ryuichi Sugizaki(Univ. of Electr-Comm.) / Noboru Yoshikane(NTT) / Tetsuya Oishi(Chuo Univ.) / (NTT) |
| Assistant | Yojiro Mori(Nagoya Univ.) / Kenji Ishii(Mitsubishi Electric) / Kotaro Mihara(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Photonic Network / Technical Committee on Network Systems / Technical Committee on Optical 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 of the Effect on Soft-decision Decoding of the Coherent M-QAM using Multi-stage symbol Placement Retention Masking |
| Sub Title (in English) | |
| Keyword(1) | Optical coherent communication |
| Keyword(2) | digital signal processing |
| Keyword(3) | quadrature amplitude modulation |
| Keyword(4) | common key cryptography |
| 1st Author's Name | Keiji Shimada |
| 1st Author's Affiliation | Kagawa University(Kagawa Univ.) |
| 2nd Author's Name | Masahiro Misumi |
| 2nd Author's Affiliation | Kagawa University(Kagawa Univ.) |
| 3rd Author's Name | Takahiro Kodama |
| 3rd Author's Affiliation | Kagawa University(Kagawa Univ.) |
| Date | 2021-06-25 |
| Paper # | OCS2021-8 |
| Volume (vol) | vol.121 |
| Number (no) | OCS-75 |
| Page | pp.pp.35-39(OCS), |
| #Pages | 5 |
| Date of Issue | 2021-06-17 (OCS) |