| Presentation | 2004/1/7 A study on techniques to estimate and notify inter-cell interference power on one-cell reuse OFDM Adaptive Modulation/TDMA systems Kazunari YOKOMAKURA, Seiichi SAMPEI, Norihiko MORINAGA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a method of estimating interference power per subcarrier and notifying them to the transmitter to cope with dynamically varing inter-cell interference thereby achieving stable operation of multilevel transmit power control (MTPC) in one-cell reuse time division multiple access (TDMA) systems based orthogonal frequency division multiplexing based adaptive modulation scheme (OFDM based AMS). In the proposed system, interference level is estimated by vector error which is the distance between the received symbol and the reference symbol regenerated from bits decoded by a soft decision decoder. As for the notification, we employ an analog quadrature amplitude modulation (QAM) and code multiplexing to achieve high frame efficiency and high accuracy of notified information, in which we divide all the subcarriers into some blocks, and notify only the average values in the block higher than a threshold. Computer simulation confirms that the proposed system can estimate and notify interference power level in high precision. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDM / Adaptive modulation scheme / Multilevel transmit power control / One-cell reuse TDMA systems / Inter-cell interference / Vector error / Analog QAM / Code division multiplexing |
| Paper # | DSP2003-145,SAT2003-142,RCS2003-240 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2004/1/7(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) | A study on techniques to estimate and notify inter-cell interference power on one-cell reuse OFDM Adaptive Modulation/TDMA systems |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | Adaptive modulation scheme |
| Keyword(3) | Multilevel transmit power control |
| Keyword(4) | One-cell reuse TDMA systems |
| Keyword(5) | Inter-cell interference |
| Keyword(6) | Vector error |
| Keyword(7) | Analog QAM |
| Keyword(8) | Code division multiplexing |
| 1st Author's Name | Kazunari YOKOMAKURA |
| 1st Author's Affiliation | Graduate School of Engineering, Osaka University() |
| 2nd Author's Name | Seiichi SAMPEI |
| 2nd Author's Affiliation | Graduate School of Engineering, Osaka University |
| 3rd Author's Name | Norihiko MORINAGA |
| 3rd Author's Affiliation | Department of Information Technology, Hiroshima International University |
| Date | 2004/1/7 |
| Paper # | DSP2003-145,SAT2003-142,RCS2003-240 |
| Volume (vol) | vol.103 |
| Number (no) | 551 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |