| Presentation | 2005-04-22 Experiments on Space Diversity Effect in MIMO Channel Transmissions with Maximum Data Rate of 1-Gbps Using VSF-Spread OFDM Radio Access Junichiro Kawamoto, Noriyuki Maeda, Hiroyuki Kawai, Kenichi Higuchi, Mamoru Sawahashi, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents experimental results on space diversity effect in MIMO channel transmissions using VSF-Spread OFDM radio access achieving the maximum data rate of 1 Gbps with 100-MHz channel bandwidth. The experimental results elucidates that in the frequency efficiency of less than approximately 2 bits/second/Hz, MIMO diversity can increase the measured throughout compared to MIMO multiplexing owing to the high transmit space diversity effect. In the higher frequency efficiency case, however, MIMO multiplexing is superior to MIMO diversity since the higher data modulation and channel coding rate in the MIMO diversity overcomes space diversity effect. It is also clarified that receiver space diversity effect is very effectual in MIMO multiplexing using QRM-MLD signal detection. Finally, we demonstrates that the real-time packet transmission of greater than 1 Gbps in a 100-MHz channel bandwidth (i.e., 10 bits/second/Hz) is achieved at the average received signal energy per bit-to-background noise power spectrum density ratio (E_b/N_0) per receiver antenna of approximately 12.0 dB using 16QAM modulation and Turbo coding with the coding rate of 8/9 in 4-by-4 OFDM multiplexing. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | broadband packet radio access / VSF-Spread OFDM / MIMO multiplexing / MIMO diversity / maximum likelihood detection / QR decomposition |
| Paper # | RCS2005-8 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2005/4/15(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) | Experiments on Space Diversity Effect in MIMO Channel Transmissions with Maximum Data Rate of 1-Gbps Using VSF-Spread OFDM Radio Access |
| Sub Title (in English) | |
| Keyword(1) | broadband packet radio access |
| Keyword(2) | VSF-Spread OFDM |
| Keyword(3) | MIMO multiplexing |
| Keyword(4) | MIMO diversity |
| Keyword(5) | maximum likelihood detection |
| Keyword(6) | QR decomposition |
| 1st Author's Name | Junichiro Kawamoto |
| 1st Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Noriyuki Maeda |
| 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 | Kenichi Higuchi |
| 4th Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| 5th Author's Name | Mamoru Sawahashi |
| 5th Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| Date | 2005-04-22 |
| Paper # | RCS2005-8 |
| Volume (vol) | vol.105 |
| Number (no) | 15 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |