| Presentation | 2001/4/12 Experimental Evaluation of Forward Link Performance of Coherent Adaptive Antenna Array Transmit Diversity for FDD W-CDMA Hidekazu Taoka, Taisuke Ihara, Shinya Tanaka, 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 investigates the effect of carrier frequency calibration of adaptive antenna array transmit diversity (AAA-TD), i.e., the compensation of the transmitter antenna weights so that the direction of the main lobe coincideds with the diection of arrival of the desired user, for transmit power-controlled dedicated physical channel (DPCH) in W-CDMA forward link. The experimental results elucidated that by using AAA-TD with carrier frequency calibration in addition to RF circuitry calibration, the average transmit E_b/N_0 at the avrage BER of 10^<-3> could be decreased by approximately 0.2 and 1.0 dB compared to the case without carrier frequency calibation with 4 and 6 antennas, respectively. It is also shown that in a 4-user environment (3-interfering users), although an error floor above the BER of 10^<-1> was observed with a 1-antenna transmitter due to the severe multipath interference, the average BER of below 10^<-6> was achieved using AAA-TD with 4 antennas, when the ratio of the target E_b/I_0 of the desired user to interfering user for fast TPC was ΔE_b/I_0=-12 dB. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DS-CDMA / Adaptive antenna array / Interference suppression / Carrier frequency calibration |
| Paper # | RCS2001-4,CQ2001-4 |
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| Conference Information | |
| Committee | CQ |
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| Conference Date | 2001/4/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Communication Quality (CQ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Evaluation of Forward Link Performance of Coherent Adaptive Antenna Array Transmit Diversity for FDD W-CDMA |
| Sub Title (in English) | |
| Keyword(1) | DS-CDMA |
| Keyword(2) | Adaptive antenna array |
| Keyword(3) | Interference suppression |
| Keyword(4) | Carrier frequency calibration |
| 1st Author's Name | Hidekazu Taoka |
| 1st Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Taisuke Ihara |
| 2nd Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| 3rd Author's Name | Shinya Tanaka |
| 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 | 2001/4/12 |
| Paper # | RCS2001-4,CQ2001-4 |
| Volume (vol) | vol.101 |
| Number (no) | 12 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |