| Presentation | 2009-08-04 PAPR Reduction Method for Multiuser MIMO-OFDM Systems with Block Diagonalization Shusaku UMEDA, Satoshi SUYAMA, Hiroshi SUZUKI, Kazuhiko FUKAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This report proposes a method to reduce peak-to-average ratio (PAPR) while maintaining an effect of block diagonalization (BD) linear precoding for multiuser (MU) MIMO-OFDM systems. In the MU-MIMO-OFDM systems, BD, orthogonalizes multiple signals of all the users by using channel state information (CSI), but the transmitted signal still has high PAPR because of OFDM characteristics. Nevertheless, as the number of transmit antennas increases, MU-MIMO-OFDM requires transmit power amplifier to be more efficient by reducing PAPR. This report proposes BD transmission with selected mapping (BD-SLM) that can reduce PAPR while maintaining the BD effect. BD-SLM performs the phase shift to modulation signals of all subcarriers of all users before the linear precoding. From several phase patterns, it selects the phase pattern that minimizes a peak of the time-domain signals, which brings about low PAPR while maintaining the precoding effect. Computer simulations demonstrate that BD-SLM can drastically reduce PAPR under condition of 8×4 MIMO and 2-user. Furthermore, in comparison with EM-SLM that is a PAPR reduction method for the eigenmode transmission, an effect of nonlinear distortion, caused by the transmit power amplifier, on the transmission performance of BD-SLM is evaluated. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile communication / MIMO-OFDM / PAPR / multiuser-MIMO / block diagonalization / SLM |
| Paper # | RCS2009-103 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2009/7/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| 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) | PAPR Reduction Method for Multiuser MIMO-OFDM Systems with Block Diagonalization |
| Sub Title (in English) | |
| Keyword(1) | Mobile communication |
| Keyword(2) | MIMO-OFDM |
| Keyword(3) | PAPR |
| Keyword(4) | multiuser-MIMO |
| Keyword(5) | block diagonalization |
| Keyword(6) | SLM |
| 1st Author's Name | Shusaku UMEDA |
| 1st Author's Affiliation | Tokyo Institute of Technology() |
| 2nd Author's Name | Satoshi SUYAMA |
| 2nd Author's Affiliation | Tokyo Institute of Technology |
| 3rd Author's Name | Hiroshi SUZUKI |
| 3rd Author's Affiliation | Tokyo Institute of Technology |
| 4th Author's Name | Kazuhiko FUKAWA |
| 4th Author's Affiliation | Tokyo Institute of Technology |
| Date | 2009-08-04 |
| Paper # | RCS2009-103 |
| Volume (vol) | vol.109 |
| Number (no) | 164 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |