| Presentation | 2004-11-18 Sphere Decoding Using Adaptive Selection of Surviving Symbol Replica Candidates for OFDM MIMO Multiplexing Noriyuki Maeda, Kenichi Higuchi, Hiroyuki Kawai, Mamoru Sawahashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes list sphere decoding (LSD) using adaptive selection of surviving symbol replica candidates in order to reduce the number of branch metric calculations for OFDM MIMO multiplexing. In the proposed algorithm, newly added symbol replica candidates are ranked by quadrant detection and then, Euclidian distance is calculated only for symbol-replica candidates with smaller branch metric compared with sphere radius, T, resulting in the remarkable reduction in computational complexity. Computer simulation results show that the average number of multiplications per frame for signal separation as the computational complexity for the proposed LSD with adaptive selection of surviving symbol replica candidates is decreased to approximately 17 % that of the original LSD for both methods the identical achievable average packet error rate (PER) performance at the information bit rate of 1.048 Gbps by 16QAM modulation and Turbo coding with the coding rate of 8/9 in 4-by-4 MIMO multiplexing with a 100-MHz bandwidth (a twelve-path Rayleigh fading channel, root mean squared (r.m.s.) delay spread of 0.26 μsec, maximum Doppler frequency of 20 Hz). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDM / Multiple-Input Multiple-Output / Maximum likelihood detection / QR decomposition / List Sphere Decoding |
| Paper # | RCS2004-222 |
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| Committee | RCS |
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| Conference Date | 2004/11/11(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) | Sphere Decoding Using Adaptive Selection of Surviving Symbol Replica Candidates for OFDM MIMO Multiplexing |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | Multiple-Input Multiple-Output |
| Keyword(3) | Maximum likelihood detection |
| Keyword(4) | QR decomposition |
| Keyword(5) | List Sphere Decoding |
| 1st Author's Name | Noriyuki Maeda |
| 1st Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Kenichi Higuchi |
| 2nd Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| 3rd Author's Name | Hiroyuki Kawai |
| 3rd Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| 4th Author's Name | Mamoru Sawahashi |
| 4th Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| Date | 2004-11-18 |
| Paper # | RCS2004-222 |
| Volume (vol) | vol.104 |
| Number (no) | 439 |
| Page | pp.pp.- |
| #Pages | 6 |
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