Presentation | 2021-11-25 Soft Input Decoding Based on Superposition of Hard Decision Signals Koki Kashihara, Satoshi Denno, Hou Yafei, |
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PDF Download Page | PDF download Page Link |
Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | In MIMO (Multiple-Input Multiple-Output) communication, it is possible to detect hard judgment signals with low calculations by using a linear filter with lattice reduction. In general, the error correction code is used in wireless communication, and it is known that the soft judgment decoding method using the soft judgment value input can obtain a higher error correction effect. However, there is a problem that the calculation amount of the soft judgment value increases. In this paper, we propose a soft input decoding based on superposition of hard decision signals. In the proposed method, we make several near point hardness judgment signals of signals detected by linear filters. Then, by calculating the probability of the signal and weighting, the soft judgment value is created with a low calculation amount. In addition, we select the near point hardness judgment signal and calculate the probability so that the error correction effect becomes larger. In this time, in the MIMO system with four transmitting antennas and four receiving antennas in QPSK, the evaluation of BER (Bit Error Rate) characteristics by applying the proposed method was carried out by computer simulation. As a result, it was confirmed that the improvement of the transmission characteristics was obtained by obtaining the gain of the error correction effect when the SIC filter and the MMSE filter were used. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | MIMO / lattice reduction / linear filter / soft output |
Paper # | SRW2021-30 |
Date of Issue | 2021-11-18 (SRW) |
Conference Information | |
Committee | SRW / SeMI / CNR |
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Conference Date | 2021/11/25(2days) |
Place (in Japanese) | (See Japanese page) |
Place (in English) | Kikai-Shinko-Kaikan Bldg. |
Topics (in Japanese) | (See Japanese page) |
Topics (in English) | IoT Workshop |
Chair | Hanako Noda(Anritsu) / Koji Yamamoto(Kyoto Univ.) / Masayuki Kanbara(NAIST) |
Vice Chair | Keiichi Mizutani(Kyoto Univ.) / Kentaro Saito(Tokyo Denki Univ.) / Hirokazu Sawada(NICT) / Kazuya Monden(Hitachi) / Yasunori Owada(NICT) / Yoshihiko Murakawa(Kyoto Inst. of Tech.) |
Secretary | Keiichi Mizutani(NTT) / Kentaro Saito(NIigata Univ.) / Hirokazu Sawada(Cyber Univ.) / Kazuya Monden(Waseda Univ.) / Yasunori Owada(Osaka Univ.) / Yoshihiko Murakawa(Toshiba) |
Assistant | Akihito Noda(Nanzan Univ.) / Yuki Katsumata(NTT DOCOMO) / Akihito Taya(Aoyama Gakuin Univ.) / Yu Nakayama(Tokyo Univ. of Agri. and Tech.) / Yuta Hoshi(NHK) / Junji Yamato(Kogakuin Univ.) |
Paper Information | |
Registration To | Technical Committee on Short Range Wireless Communications / Technical Committee on Sensor Network and Mobile Intelligence / Technical Committee on Cloud Network Robotics |
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Language | JPN |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | Soft Input Decoding Based on Superposition of Hard Decision Signals |
Sub Title (in English) | |
Keyword(1) | MIMO |
Keyword(2) | lattice reduction |
Keyword(3) | linear filter |
Keyword(4) | soft output |
1st Author's Name | Koki Kashihara |
1st Author's Affiliation | Okayama University(Okayama Univ.) |
2nd Author's Name | Satoshi Denno |
2nd Author's Affiliation | Okayama University(Okayama Univ.) |
3rd Author's Name | Hou Yafei |
3rd Author's Affiliation | Okayama University(Okayama Univ.) |
Date | 2021-11-25 |
Paper # | SRW2021-30 |
Volume (vol) | vol.121 |
Number (no) | SRW-265 |
Page | pp.pp.7-12(SRW), |
#Pages | 6 |
Date of Issue | 2021-11-18 (SRW) |