| Presentation | 2004/4/16 A study on controlling scheme of cancellation moderating factor of MAI canceller cascaded with adaptive array antenna for DS-CDMA system Kazuto YANO, Shoichi HIROSE, Susumu YOSHIDA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | For effective multiple access interference suppression, a receiver cascading an adaptive array antenna (AAA) and a multistage parallel interference canceller (MPIC) has been studied. In this receiver, the MPIC generates and subtracts replicas of residual interference signals in the output of the AAA. The generated replica is multiplied by a positive number smaller than unity, which is called cancellation moderating factor (CMF), to prevent interference enhancement due to subtracting inaccurate replicas. Since the accuracy of channel estimation varies according to the arrival angles of the interference signals owing to spatial suppression by the AAA, CMF control for each interference signal is necessary to mitigate the replica subtraction error. In this paper, a CMF controlling scheme using the ratio of the interference signal's power to the desired signal's power is proposed. The performance of the cascading receiver with different CMF controlling schemes is evaluated by computer simulations assuming an asynchronous uplink single chip-rate variable spreading factor DS-CDMA system. The simulation results show that the performance of the cascading receiver is improved by using the proposed power-based CMF control compared with the case of using the log likelihood ratio of information symbols for CMF control in an exponentially decayed 5-path Rayleigh distributed channel. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | variable spreading factor DS-CDMA / MAI canceller / cancellation moderating factor / adaptive array antenna / uplink channel |
| Paper # | RCS2004-28,CQ2004-28 |
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| Conference Information | |
| Committee | CQ |
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| Conference Date | 2004/4/16(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) | A study on controlling scheme of cancellation moderating factor of MAI canceller cascaded with adaptive array antenna for DS-CDMA system |
| Sub Title (in English) | |
| Keyword(1) | variable spreading factor DS-CDMA |
| Keyword(2) | MAI canceller |
| Keyword(3) | cancellation moderating factor |
| Keyword(4) | adaptive array antenna |
| Keyword(5) | uplink channel |
| 1st Author's Name | Kazuto YANO |
| 1st Author's Affiliation | Graduate School of Informatics, Kyoto University:Japan Society for the Promotion Science() |
| 2nd Author's Name | Shoichi HIROSE |
| 2nd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 3rd Author's Name | Susumu YOSHIDA |
| 3rd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| Date | 2004/4/16 |
| Paper # | RCS2004-28,CQ2004-28 |
| Volume (vol) | vol.104 |
| Number (no) | 22 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |