| Presentation | 2020-03-05 Preliminary Study of HPA Linearization System using Look-up Table of HPA Input-Output Characteristics Akira Tada, Masahiro Umehira, Xiaoyan Wang, Shigeki Takeda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In order to reduce adjacent channel leakage power (ACLP) caused by small output back-off operation of HPA (High Power Amplifier) of the mobile terminal, the authors have been proposing HPA linearization system where the base station estimates the HPA input / output characteristics of the mobile terminal and feeds it back to the terminal to linearize HPA. In this HPA linearization system, a mobile terminal transmits reference signal and the base station detects the amplitude information of HPA from the received reference signals and estimates HPA input / output characteristics by using spline interpolation. However, it is necessary to transmit the reference signals many times to achieve high accuracy of input / output characteristics estimation in white noise and/or frequency selective fading on the propagation path. To solve this problem, this report proposes another type of HPA linearization system where HPA input / output characteristics of the mobile terminal is stored in a look-up table in advance and estimates the operating point of the HPA at the base station. In the proposed HPA linearization system, operating point of HPA, i.e. output back-off needs to be estimated by the base station and estimation error increases ACLP. This report evaluates ACLP due to operating point estimation error to clarify the required accuracy of operating point estimation error of HPA. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | HPA / ACLP / pre-distortion / DFTs-OFDM |
| Paper # | RCS2019-368 |
| Date of Issue | 2020-02-26 (RCS) |
| Conference Information | |
| Committee | RCS / SR / SRW |
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| Conference Date | 2020/3/4(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Chair | Tomoaki Otsuki(Keio Univ.) / Masayuki Ariyoshi(NEC) / Satoshi Denno(Okayama Univ.) |
| Vice Chair | Satoshi Suyama(NTT DoCoMo) / Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Suguru Kameda(Tohoku Univ.) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Keiichi Mizutani(Kyoto Univ.) |
| Secretary | Satoshi Suyama(NTT) / Fumiaki Maehara(Kyushu Univ.) / Toshihiko Nishimura(ATR) / Suguru Kameda(Univ. of Electro-Comm.) / Osamu Takyu(Mie Univ.) / Kentaro Ishidu(Tokyo Inst. of Tech.) / Keiichi Mizutani(Anritsu) |
| Assistant | Kazushi Muraoka(NEC) / Shinsuke Ibi(Doshisha Univ.) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Mai Ohta(Fukuoka Univ.) / Teppei Oyama(Fujitsu Lab.) / Kentaro Kobayashi(Nagoya Univ.) / Masaaki Fuse(Anritsu) / Tomoki Murakami(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems / Technical Committee on Smart Radio / Technical Committee on Short Range Wireless Communications |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Preliminary Study of HPA Linearization System using Look-up Table of HPA Input-Output Characteristics |
| Sub Title (in English) | |
| Keyword(1) | HPA |
| Keyword(2) | ACLP |
| Keyword(3) | pre-distortion |
| Keyword(4) | DFTs-OFDM |
| 1st Author's Name | Akira Tada |
| 1st Author's Affiliation | Graduate School of Ibaraki University(Ibaraki Univ.) |
| 2nd Author's Name | Masahiro Umehira |
| 2nd Author's Affiliation | Graduate School of Ibaraki University(Ibaraki Univ.) |
| 3rd Author's Name | Xiaoyan Wang |
| 3rd Author's Affiliation | Graduate School of Ibaraki University(Ibaraki Univ.) |
| 4th Author's Name | Shigeki Takeda |
| 4th Author's Affiliation | Graduate School of Ibaraki University(Ibaraki Univ.) |
| Date | 2020-03-05 |
| Paper # | RCS2019-368 |
| Volume (vol) | vol.119 |
| Number (no) | RCS-448 |
| Page | pp.pp.245-249(RCS), |
| #Pages | 5 |
| Date of Issue | 2020-02-26 (RCS) |