| Presentation | 2014-10-16 Single-Carrier Multi-User MIMO Applying Transmit Equalization and Tomlinson-Harashima Precoding in Time-Domain Shohei YOSHIOKA, Shinya KUMAGAI, Fumiyuki ADACHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In multi-user (MU) multiple-input multiple-output (MIMO) using Tomlinson-Harashima precoding (THP), 2-step signal processing of subtracting inter-user interference (IUI) and multiplying precoding matrix for the equivalent channel matrix of a lower triangular matrix is performed at the transmitter in order to avoid IUI. For suppressing the transmit power increase due to the former processing, modulo operation is applied. A combination of THP and broadband single-carrier (SC) block transmission using transmit equalization can centralize the signal processing in the transmitter, suppress inter-symbol interference (ISI) caused by frequency-selective fading, and obtain frequency diversity gain. However in conventional SC-MU-MIMO applying transmit equalization and THP in frequency-domain (frequency-domain transmit equalization SC-THP), since IUI is independently subtracted for each frequency component and ISI is avoided using transmit frequency-domain equalization, modulo operation does not sufficiently suppress the transmit power. Subtracting both of IUI and ISI in time-domain for signal blocks is expected to bring in the large effect of applying modulo operation. In this paper, we propose SC-MU-MIMO applying transmit equalization and THP in time-domain (time-domain transmit equalization SC-THP). We show, by computer simulation, time-domain transmit equalization SC-THP provides better average bit error rate (BER) performance than frequency-domain transmit equalization SC-THP. Computational complexity is compared between time-domain transmit equalization SC-THP and frequency-domain transmit equalization SC-THP. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SC-MU-MIMO / Tomlinson-Harashima Precoding / Transmit equalization / Time-domain precoding |
| Paper # | RCS2014-156 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2014/10/9(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Single-Carrier Multi-User MIMO Applying Transmit Equalization and Tomlinson-Harashima Precoding in Time-Domain |
| Sub Title (in English) | |
| Keyword(1) | SC-MU-MIMO |
| Keyword(2) | Tomlinson-Harashima Precoding |
| Keyword(3) | Transmit equalization |
| Keyword(4) | Time-domain precoding |
| 1st Author's Name | Shohei YOSHIOKA |
| 1st Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Shinya KUMAGAI |
| 2nd Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University |
| 3rd Author's Name | Fumiyuki ADACHI |
| 3rd Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University |
| Date | 2014-10-16 |
| Paper # | RCS2014-156 |
| Volume (vol) | vol.114 |
| Number (no) | 254 |
| Page | pp.pp.- |
| #Pages | 6 |
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