| Presentation | 2004/1/9 Experiments on Adaptive Antenna Array-Beam Forming Transmitter Methods According to Angle Spread Among Paths in VSF-OFCDM Forward Link Hidekazu Taoka, Takashi Kataoka, Kenichi Higuchi, Mamoru Sawahashi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper experimentally investigated the optimum beam forming methods for Adaptive Antenna Array-Beam Forming (AAA-BF) transmitter in the forward link using Variable Spreading Factor-Orthogonal Frequency and Code Division Multiplexing (VSF-OFCDM) broadband wireless access based on direction of arrival (DOA) of each path actually estimated in the reverse link. Laboratory experimental results elucidated that when the angle spread among paths was below approximately 12 degrees, the required transmit signal energy per symbol-to-background noise power spectrum density ratio (E_S/N_0) at the average packet error rate (PER) = 10^<-1> was most decreased by using the beam forming method that the main beam was directed toward the DOAs for all paths and that when the angle spread was over approximately 12 degrees, the required E_S/N_0 was most decreased by using the beam forming method that the direction of main beam was directed toward the DOA with maximum received signal power (in case of 8 transmitter antennas). Furthermore, it was clarified that the effect in reduction of the required transmit E_S/N_0 by directing the main beam to the direction of a target user was dominant since the orthogonality among users was maintained in a frequency-selective fading channel in OFCDM with time-domain spreading. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | broadband wireless access / forward link / VSF-OFCD / adaptive array / direction of arrival estimation |
| Paper # | DSP2003-200 |
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| Conference Information | |
| Committee | DSP |
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| Conference Date | 2004/1/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Digital Signal Processing (DSP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experiments on Adaptive Antenna Array-Beam Forming Transmitter Methods According to Angle Spread Among Paths in VSF-OFCDM Forward Link |
| Sub Title (in English) | |
| Keyword(1) | broadband wireless access |
| Keyword(2) | forward link |
| Keyword(3) | VSF-OFCD |
| Keyword(4) | adaptive array |
| Keyword(5) | direction of arrival estimation |
| 1st Author's Name | Hidekazu Taoka |
| 1st Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Takashi Kataoka |
| 2nd Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| 3rd Author's Name | Kenichi Higuchi |
| 3rd Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| 4th Author's Name | Mamoru Sawahashi |
| 4th Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| Date | 2004/1/9 |
| Paper # | DSP2003-200 |
| Volume (vol) | vol.103 |
| Number (no) | 547 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |