| Presentation | 2014-06-17 Single-Carrier MU-MIMO using Vector Perturbation Shohei YOSHIOKA, Shinya KUMAGAI, Fumiyuki ADACHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose two new vector perturbation (VP) schemes for single-carrier (SC) multi-user (MU) multiple-input multiple-output (MIMO) downlink block transmission. The first VP scheme (SC-VP-1) adds a perturbation vector to each user's signal block in time-domain and then, multiplies a preceding matrix to perturbation vector-added signal blocks in time-domain. The preceding matrix is derived using the channel matrix expression which is different from that of conventional VP. In order to reduce the computational complexity of perturbation vector search, a combination of QR decomposition and M algorithm is applied. On the other hand, in the second VP scheme (SC-VP-2), perturbation vector-added signal blocks are transformed into frequency-domain signal blocks, to multiply the preceding matrices in frequency-domain. In SC-VP-2, unlike from conventional VP and SC-VP-1, a time-domain expression of preceding matrix multiplication which is equivalent to frequency-domain expression is derived and then, QR decomposition and M algorithm based perturbation vector search is applied. We show, by theoretical analysis, that SC-VP-1 and SC-VP-2 are equivalent. We also show, by computer simulation, that SC-VP-1 and SC-VP-2 provide larger improvement than orthogonal frequency division multiplexing (OFDM) MU-MIMO using VP (OFDM-VP) in terms of the average bit error rate (BER) improvement from the case of linear preceding. Computational complexity is compared among SC-VP-1, SC-VP-2, and OFDM-VP. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SC-MU-MIMO / Vector Perturbation / QR decomposition / M algorithm |
| Paper # | RCS2014-55 |
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| Committee | RCS |
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| Conference Date | 2014/6/10(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| 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) | Single-Carrier MU-MIMO using Vector Perturbation |
| Sub Title (in English) | |
| Keyword(1) | SC-MU-MIMO |
| Keyword(2) | Vector Perturbation |
| Keyword(3) | QR decomposition |
| Keyword(4) | M algorithm |
| 1st Author's Name | Shohei YOSHIOKA |
| 1st Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Shinya KUMAGAI |
| 2nd Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University |
| 3rd Author's Name | Fumiyuki ADACHI |
| 3rd Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University |
| Date | 2014-06-17 |
| Paper # | RCS2014-55 |
| Volume (vol) | vol.114 |
| Number (no) | 86 |
| Page | pp.pp.- |
| #Pages | 6 |
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