| Presentation | 2012-08-30 Transmission Performance Improvement by Non-Linear Distortion Noise Control in Spectrum Sharing Seiichiro OKAMOTO, Shigeru TOMISATO, Hiromasa FUJII, Masaharu HATA, Shunji MIURA, Hidetoshi KAYAMA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | On spectrum sharing systems, transmission power control (TPC) effectively works to avoid harmful inter-system interference by reducing transmission power of a low-priority system in shared bands. In such cases, however, non-linear distortion noise severely affects transmission quality of low-priority TPC users because their transmission power is reduced. This paper proposes a non-linear distortion noise control method for adaptive modulation based on a clipping and filtering method to improve reception quality of the low-priority TPC users. The proposed method adaptively filters non-linear distortion noise in TPC bands according to required transmission quality of modulation schemes. From the relation between clipping levels and the non-linear distortion noise power when applying OFDM transmission, threshold levels for clipping and distortion noise power ratios for filtering used with the proposed method are investigated by computer simulations. Spectrum properties and BER performance with the proposed method are also evaluated. The results show the proposed method can meet required transmission quality according to modulation schemes of the low-priority users when sharing spectrum with TPC. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDM / Spectrum Sharing / Transmission Power Control / Non-Linear Distortion |
| Paper # | RCS2012-101 |
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| Committee | RCS |
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| Conference Date | 2012/8/23(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) | Transmission Performance Improvement by Non-Linear Distortion Noise Control in Spectrum Sharing |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | Spectrum Sharing |
| Keyword(3) | Transmission Power Control |
| Keyword(4) | Non-Linear Distortion |
| 1st Author's Name | Seiichiro OKAMOTO |
| 1st Author's Affiliation | Graduate School of Natural Science and Technology, Okayama University() |
| 2nd Author's Name | Shigeru TOMISATO |
| 2nd Author's Affiliation | Graduate School of Natural Science and Technology, Okayama University |
| 3rd Author's Name | Hiromasa FUJII |
| 3rd Author's Affiliation | Research Laboratories, NTT DOCOMO, INC. |
| 4th Author's Name | Masaharu HATA |
| 4th Author's Affiliation | Graduate School of Natural Science and Technology, Okayama University |
| 5th Author's Name | Shunji MIURA |
| 5th Author's Affiliation | Research Laboratories, NTT DOCOMO, INC. |
| 6th Author's Name | Hidetoshi KAYAMA |
| 6th Author's Affiliation | Research Laboratories, NTT DOCOMO, INC. |
| Date | 2012-08-30 |
| Paper # | RCS2012-101 |
| Volume (vol) | vol.112 |
| Number (no) | 192 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |