| Presentation | 2014-04-18 Subcarrier Smoothing Calibration on Multiuser MIMO-OFDM Systems Using Implicit Feedback Hayato FUKUZONO, Tomoki MURAKAMI, Riichi KUDO, Yasushi TAKATORI, Masato MIZOGUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is necessary to calibrate uplink channel state information (CSI) estimated for transmit beamforming in frequency domain on multiuser multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems with implicit feedback (IFB). Calibration coefficients, by which uplink CSI is multiplied in the calibration, have some frequency correlation, because they depend on circuitry responses. In this paper, we propose subcarrier smoothing calibration, a scheme in which calibration coefficients are smoothed in frequency domain, to improve calibration accuracy. In order to evaluate the effect of the proposed scheme for practical circuitry responses, we measure frequency responses of actual, commercial radio frequency (RF) transceiver circuits, and employ them for computer simulations. Simulation results show that the proposed scheme improves signal to interference plus noise power ratio (SINR) compared with a conventional calibration scheme without the smoothing. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | multiuser MIMO / OFDM / implicit feedback / calibration / subcarrier smoothing / circuitry response |
| Paper # | RCS2014-16 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2014/4/10(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) | Subcarrier Smoothing Calibration on Multiuser MIMO-OFDM Systems Using Implicit Feedback |
| Sub Title (in English) | |
| Keyword(1) | multiuser MIMO |
| Keyword(2) | OFDM |
| Keyword(3) | implicit feedback |
| Keyword(4) | calibration |
| Keyword(5) | subcarrier smoothing |
| Keyword(6) | circuitry response |
| 1st Author's Name | Hayato FUKUZONO |
| 1st Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation() |
| 2nd Author's Name | Tomoki MURAKAMI |
| 2nd Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
| 3rd Author's Name | Riichi KUDO |
| 3rd Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
| 4th Author's Name | Yasushi TAKATORI |
| 4th Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
| 5th Author's Name | Masato MIZOGUCHI |
| 5th Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
| Date | 2014-04-18 |
| Paper # | RCS2014-16 |
| Volume (vol) | vol.114 |
| Number (no) | 8 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |