Presentation 2018-02-28
Study on Adaptive STBC-TD for Distributed MIMO Cooperative Transmission
Tomoyuki Saito, Amnart Boonkajay, Fumiyuki Adachi,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Space-time block coded transmit diversity (STBC-TD) uses the minimum mean square error combining diversity (MMSECD) for single-carrier (SC) uplink and the maximal ratio transmit diversity (MRTD) for OFDM downlink. The MMSECD weight and the MRTD weight are generated before transmission. This is done by using pilot based channel estimation using the uplink and downlink pilots which are transmitted before data. However, in a high mobility environment, the bit-err rate (BER) performance degrades because the channel changes after pilot transmission. In order to mitigate the performance degradation, in this paper, we propose an adaptive STBC-TD with decision feedback channel estimation. Using decision feedback channel estimation, the adaptive STBC-TD updates the MMSECD weight for SC uplink transmission while it introduces the receive filter for OFDM downlink transmission so as to keep the equivalent channel close to the equivalent channel computed upon receiving the downlink pilot. We evaluate, by computer simulation, the uncoded BER performance with adaptive STBC-TD. It is shown that the proposed adaptive STBC-TD increases the allowable maximum Doppler frequency fDT for keeping BER<10-2 about 4.3 times and 2.2 times for SC uplink transmission and OFDM downlink transmission, respectively.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) STBC / Channel estimation / Decision feedback / SC / OFDM
Paper # RCS2017-320
Date of Issue 2018-02-21 (RCS)

Conference Information
Committee RCS / SR / SRW
Conference Date 2018/2/28(3days)
Place (in Japanese) (See Japanese page)
Place (in English) YRP
Topics (in Japanese) (See Japanese page)
Topics (in English) Mobile Communication Workshop
Chair Hidekazu Murata(Kyoto Univ.) / Kenta Umebayashi(Tokyo Univ. of Agric. and Tech.) / Tadao Nakagawa(Tottori Univ.)
Vice Chair Yukitoshi Sanada(Keio Univ.) / Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT DoCoMo) / Masayuki Ariyoshi(NEC) / Suguru Kameda(Tohoku Univ.) / Satoshi Denno(Okayama Univ.) / Makoto Hamaminato(Fujitsu labs.)
Secretary Yukitoshi Sanada(Toshiba) / Eisuke Fukuda(Hokkaido Univ.) / Satoshi Suyama(NICT) / Masayuki Ariyoshi(ATR) / Suguru Kameda(NICT) / Satoshi Denno(Kyoto Univ.) / Makoto Hamaminato
Assistant Tetsuya Yamamoto(Panasonic) / Koichi Ishihara(NTT) / Kazushi Muraoka(NEC) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) / Mamiko Inamori(Tokai Univ.) / Hiroyuki Shiba(NTT) / Gia Khanh Tran(Tokyo Inst. of Tech.) / Syusuke Narieda(NIT, Akashi College) / Kentaro Saito(Tokyo Inst. of Tech.) / Hiromasa Yamauchi(Fujitsu labs.)

Paper Information
Registration To Technical Committee on Radio Communication Systems / Technical Committee on Smart Radio / Technical Committee on Short Range Wireless Communications
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Study on Adaptive STBC-TD for Distributed MIMO Cooperative Transmission
Sub Title (in English)
Keyword(1) STBC
Keyword(2) Channel estimation
Keyword(3) Decision feedback
Keyword(4) SC
Keyword(5) OFDM
1st Author's Name Tomoyuki Saito
1st Author's Affiliation Tohoku University(Tohoku Univ.)
2nd Author's Name Amnart Boonkajay
2nd Author's Affiliation Tohoku University(Tohoku Univ.)
3rd Author's Name Fumiyuki Adachi
3rd Author's Affiliation Tohoku University(Tohoku Univ.)
Date 2018-02-28
Paper # RCS2017-320
Volume (vol) vol.117
Number (no) RCS-456
Page pp.pp.19-24(RCS),
#Pages 6
Date of Issue 2018-02-21 (RCS)