| Presentation | 2014-11-12 Open-Loop Approximate Block Diagonalization for Multiuser MIMO Communications with non-Gaussian Distributed Incidence Angles Shota KUBO, Kazuhiko FUKAWA, Hiroshi SUZUKI, Yuyuan CHANG, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As a precoding scheme to suppress co-channel interference among users for multiuser MIMO mobile communications, an approximate block diagonalization (BD) method that does not require feedback of channel state information (CSI) by using the second-order statistics of the channel has been proposed. However, this scheme assumes that an incidence angle distribution of propagation paths follows the Gaussian distribution and thus can hardly be applied to other distributions. To cope with such a problem, this report proposes an approximate BD scheme that estimates the incidence angle distribution from uplink received signals by using the minimum variance distortionless response (MVDR) with the spatial smoothing and that obtains a covariance matrix of the downlink channel from the estimated incidence angle distribution. Computer simulations under conditions of two users and mixed normal distributions with two peaks demonstrate that the proposed scheme can achieve excellent BER performance in a low E_b/N_0 region although it suffers from error floors in a high E_b/N_0 region owing to residual interference. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile communication / multiuser MIMO / precoding / block diagonalization / DOA estimation / spatial smoothing / MVDR |
| Paper # | RCS2014-201 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2014/11/5(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) | Open-Loop Approximate Block Diagonalization for Multiuser MIMO Communications with non-Gaussian Distributed Incidence Angles |
| Sub Title (in English) | |
| Keyword(1) | Mobile communication |
| Keyword(2) | multiuser MIMO |
| Keyword(3) | precoding |
| Keyword(4) | block diagonalization |
| Keyword(5) | DOA estimation |
| Keyword(6) | spatial smoothing |
| Keyword(7) | MVDR |
| 1st Author's Name | Shota KUBO |
| 1st Author's Affiliation | Tokyo Institute of Technology() |
| 2nd Author's Name | Kazuhiko FUKAWA |
| 2nd Author's Affiliation | Tokyo Institute of Technology |
| 3rd Author's Name | Hiroshi SUZUKI |
| 3rd Author's Affiliation | Tokyo Institute of Technology |
| 4th Author's Name | Yuyuan CHANG |
| 4th Author's Affiliation | Tokyo Institute of Technology |
| Date | 2014-11-12 |
| Paper # | RCS2014-201 |
| Volume (vol) | vol.114 |
| Number (no) | 295 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |