| Presentation | 2007-09-21 Performance Analysis of QO-STBC Grouped Multi-User System Said SALEH, Takeshi HASHIMOTO, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Multiple-input multiple-output (MIMO) channel configuration for wireless transmission has been attracting attention widely since it can provide larger capacity and stronger robustness against fading. However ; using multiple antennas at the subscriber has the drawback that it makes the subscriber unit larger and more expensive. Because of that Multiple-input single-output (MISO) is more preferable in downlink CDMA system. Taking advantage of the multiple antennas at the base station combined with space time block codes (STBCs), we can attain space diversity. Quasi orthogonal space-time block code (QO-STBC) is a good choice because it could be used with complex signals and a simple decoder. MISO CDMA in selective fading channels suffers from multiple access interference (MAI). So, we propose a new downlink MISO CDMA system over frequency-selective fading channel, which has good performance even when the system is overloaded (when the number of users is larger than processing gain). Combining grouping of users with QO-STBC and using the proper spreading sequences assigning, we can realize a downlink MISO CDMA system with overload factor 2 under frequency-selective fading |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CDMA / MIMO / MISO / QO-STBC / overload factor / downlink / frequency-selective fading |
| Paper # | MoMuC2007-51 |
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| Conference Information | |
| Committee | MoMuC |
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| Conference Date | 2007/9/13(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Mobile Multimedia Communications(MoMuC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance Analysis of QO-STBC Grouped Multi-User System |
| Sub Title (in English) | |
| Keyword(1) | CDMA |
| Keyword(2) | MIMO |
| Keyword(3) | MISO |
| Keyword(4) | QO-STBC |
| Keyword(5) | overload factor |
| Keyword(6) | downlink |
| Keyword(7) | frequency-selective fading |
| 1st Author's Name | Said SALEH |
| 1st Author's Affiliation | Graduate School of Electro-Communications, The University of Electro-Communications() |
| 2nd Author's Name | Takeshi HASHIMOTO |
| 2nd Author's Affiliation | Graduate School of Electro-Communications, The University of Electro-Communications |
| Date | 2007-09-21 |
| Paper # | MoMuC2007-51 |
| Volume (vol) | vol.107 |
| Number (no) | 224 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |