| Presentation | 2022-01-20 A Study on Extended DLDC-Aided Joint Signal Processing in Unified Optical and Wireless Channels Yoshikatsu Wakabayashi, Shinsuke Ibi, Takumi Takahashi, Hisato Iwai, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | One of the solutions for utilizing the high-frequency band is to deploy multiple distributed units (DUs) under a central unit (CU) in cloud radio access network (C-RAN) architecture. In the case of the uplink from the terminal to the CU, wireless links are established between the mobile terminal and DU. On the other hand, optical fibers are connected between the DU and CU. In the sense of end-to-end points, the link between terminals and CU is a kind of relay communication. When PDM (Polarization Division Multiplexing) communication is used for optical communications, it is possible to construct multi-input multi-output (MIMO) channels in the fiber. In this configuration, both DU and CU need to detect MIMO signals, which causes severe signal processing delay. In this paper, to improve the responsiveness, it is assumed that the DU does not detect the signal but simply transfers, and only the CU detects the signal. At this time, it is effective to perform blind signal separation (BSS) after unifying the wireless space and the optical space as one MIMO channel. We have previously proposed a method for demodulating in a CU using differential linear dispersion code (DLDC) to realize the BSS. However, there was a problem of performance degradation due to residual interference caused by the block diagonal approximation of the unified channel matrix. In order to deal with this problem in this paper, we propose a scheme using an extended DLDC with an extended size of the dispersion matrix by exploiting the pair-wise error probability (PEP). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical-wireless channel / MIMO / PDM / DLDC / PEP |
| Paper # | IT2021-42,SIP2021-50,RCS2021-210 |
| Date of Issue | 2022-01-13 (IT, SIP, RCS) |
| Conference Information | |
| Committee | RCS / SIP / IT |
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| Conference Date | 2022/1/20(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) / Yukihiro Bandou(NTT) / Tadashi Wadayama(Nagoya Inst. of Tech.) |
| Vice Chair | Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Toshihisa Tanaka(Tokyo Univ. Agri.&Tech.) / Takayuki Nakachi(Ryukyu Univ.) / Tetsuya Kojima(Tokyo Kosen) |
| Secretary | Toshihiko Nishimura(NEC) / Tomoya Tandai(Panasonic) / Fumihide Kojima(Xiaomi) / Toshihisa Tanaka(Takushoku Univ.) / Takayuki Nakachi(Tokyo Univ. Agri.&Tech.) / Tetsuya Kojima(Saitamai Univ.) |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Taichi Yoshida(UEC) / Seisuke Kyochi(Univ. of Kitakyushu) / Masanori Hirotomo(Saga Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems / Technical Committee on Signal Processing / Technical Committee on Information Theory |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Extended DLDC-Aided Joint Signal Processing in Unified Optical and Wireless Channels |
| Sub Title (in English) | |
| Keyword(1) | Optical-wireless channel |
| Keyword(2) | MIMO |
| Keyword(3) | PDM |
| Keyword(4) | DLDC |
| Keyword(5) | PEP |
| 1st Author's Name | Yoshikatsu Wakabayashi |
| 1st Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 2nd Author's Name | Shinsuke Ibi |
| 2nd Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 3rd Author's Name | Takumi Takahashi |
| 3rd Author's Affiliation | Osaka University(Osaka Univ.) |
| 4th Author's Name | Hisato Iwai |
| 4th Author's Affiliation | Doshisha University(Doshisha Univ.) |
| Date | 2022-01-20 |
| Paper # | IT2021-42,SIP2021-50,RCS2021-210 |
| Volume (vol) | vol.121 |
| Number (no) | IT-327,SIP-328,RCS-329 |
| Page | pp.pp.81-86(IT), pp.81-86(SIP), pp.81-86(RCS), |
| #Pages | 6 |
| Date of Issue | 2022-01-13 (IT, SIP, RCS) |