| Presentation | 2011-07-21 Performance of Outer-Loop Control for AMC Based on Mutual Information in MIMO-OFDM Downlink Teppei Ebihara, Hidekazu Taoka, Nobuhiko Miki, Mamoru Sawahashi, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents the performance of outer-loop control for adaptive modulation and coding (AMC) using mutual information (MI) based mapping between the block error rate (BLER) and received signal-to-noise power ratio (SNR) in multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) downlink employing maximum likelihood detection (MLD). In AMC, we generate a mapping table between the BLER and MI per bit in advance, which is computed from the received SNR, assuming typical channel conditions including the path model and fading maximum Doppler frequency. Then, in the proposed outer-loop control, the measured MI per bit value for selecting the best modulation and coding scheme (MCS) is adjusted so that the measured BLER after turbo decoding satisfies the prescribed target value. Computer simulation results show that the outer-loop control achieves almost the same throughput as that with a mapping table assuming channel conditions identical to those for the actual measurement, while achieving the nearly identical target BLER. Moreover, we show that the best step size, which provides nearly the maximum throughput, differs according to the change in the maximum Doppler frequency in contrast to the relative feedback delay of the AMC loop. Nevertheless, it is insensitive to the target BLER value. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile communications / MIMO / AMC / Mutual information |
| Paper # | RCS2011-77 |
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| Committee | RCS |
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| Conference Date | 2011/7/14(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) | Performance of Outer-Loop Control for AMC Based on Mutual Information in MIMO-OFDM Downlink |
| Sub Title (in English) | |
| Keyword(1) | Mobile communications |
| Keyword(2) | MIMO |
| Keyword(3) | AMC |
| Keyword(4) | Mutual information |
| 1st Author's Name | Teppei Ebihara |
| 1st Author's Affiliation | Department of Information Network Engineering, Tokyo City University() |
| 2nd Author's Name | Hidekazu Taoka |
| 2nd Author's Affiliation | DOCOMO Communications Laboratories Europe GmbH |
| 3rd Author's Name | Nobuhiko Miki |
| 3rd Author's Affiliation | Research Laboratories, NTT DOCOMO, INC. |
| 4th Author's Name | Mamoru Sawahashi |
| 4th Author's Affiliation | Department of Information Network Engineering, Tokyo City University |
| Date | 2011-07-21 |
| Paper # | RCS2011-77 |
| Volume (vol) | vol.111 |
| Number (no) | 145 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |