| Presentation | 2004/10/23 MLD with QR Decomposition Using Bi-Directional Ranking and Selection of Surviving Symbol Replica for VSF-Spread 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 bi-directional ranking and selection of surviving symbol replicas in maximum likelihood detection with QR decomposition and M-algorithm (QRM-MLD) for Variable Spreading Factor (VSF)-Spread Orthogonal Frequency Division Multiplexing (OFDM) multiple-input multiple-output (MIMO) multiplexing. In the proposed algorithm, the calculations of the surviving symbol replicas are first performed in the forward QRM-MLD, and then, the calculations of the surviving symbol replicas are performed in the reverse QRM-MLD employing the reliability information of the surviving symbol replicas derived in the forward QRM-MLD. Computer simulation results show that the required average received signal energy per bit-to-noise power spectrum density ratio (Eb/No) per receiver antenna branch at the average packet error rate of 10^<-2> in the proposed method is reduced by approximately 0.7, 1.0, and 0.5 dB compared to that in the original QRM-MLD associated with 16QAM modulation and Turbo coding with the coding rate of 1/2, 3/4, and 8/9 assuming the identical computational complexity in 4-by-4 MIMO multiplexing with a 100-MHz bandwidth (twelve-path Rayleigh fading channel, root mean squared delay spread of 0.26 μsec, maximum Doppler frequency of 20 Hz, and fading correlation between two contiguous antenna branches of 0.6 for the transmitter and receiver antenna branches). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | VSF-Spread OFDM / Multiple-Input Multiple-Output / Maximum likelihood detection / QR decomposition / M-algorithm |
| Paper # | A・P2004-185,RCS2004-206 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2004/10/23(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | MLD with QR Decomposition Using Bi-Directional Ranking and Selection of Surviving Symbol Replica for VSF-Spread OFDM MIMO Multiplexing |
| Sub Title (in English) | |
| Keyword(1) | VSF-Spread OFDM |
| Keyword(2) | Multiple-Input Multiple-Output |
| Keyword(3) | Maximum likelihood detection |
| Keyword(4) | QR decomposition |
| Keyword(5) | M-algorithm |
| 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 | 2004/10/23 |
| Paper # | A・P2004-185,RCS2004-206 |
| Volume (vol) | vol.104 |
| Number (no) | 397 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |