| Presentation | 2001/8/30 Performance of a Feedback-Type Adaptive Array Antenna for Two-Frequency Duplex Communications Takayuki FUNAMA, Makoto TAROMARU, Yoshihiko AKAIWA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Adaptive Array Antenna (AAA) with wide element spacing shows interference suppression as well as diversity effect against multi-path fading, because correlation of received signals in each antenna elements becomes low. In a time-division duplexed (TDD) system, weighting factors that are determined for signal reception in the up-link can be used for the down-link transmission, because of the reciprocity in this system. Thus an AAA placed only at a base station improves transmission performance in both up- and down-link. In a frequency-division duplexed (FDD) system, however, we can not enjoy the benefit, since frequency are different between the up- and the down-link and therefore the reciprocity never holds. In this paper, we study a feedback type AAA system for FDD systems. Computer simulation results showed that in an FDD system the AAA placed only at base station can cope with co-channel interference and fading for down-link when feedback control delay time is shorter than fading period. Moreover, we applied our system to a handoff mechanism and obtained better bit error rate performance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | feedback type AAA / fading / co-channel interference / control delay time / handoff |
| Paper # | RCS2001-98 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2001/8/30(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) | Performance of a Feedback-Type Adaptive Array Antenna for Two-Frequency Duplex Communications |
| Sub Title (in English) | |
| Keyword(1) | feedback type AAA |
| Keyword(2) | fading |
| Keyword(3) | co-channel interference |
| Keyword(4) | control delay time |
| Keyword(5) | handoff |
| 1st Author's Name | Takayuki FUNAMA |
| 1st Author's Affiliation | Graduate School of Information Science and Electrical Engineering, Kyushu University() |
| 2nd Author's Name | Makoto TAROMARU |
| 2nd Author's Affiliation | Department of Electrical Engineering, Faculty of Engineering, Kyushu Sangyo University |
| 3rd Author's Name | Yoshihiko AKAIWA |
| 3rd Author's Affiliation | Graduate School of Information Science and Electrical Engineering, Kyushu University |
| Date | 2001/8/30 |
| Paper # | RCS2001-98 |
| Volume (vol) | vol.101 |
| Number (no) | 279 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |