| Presentation | 2014-11-21 A Polar-modulation EPWM Transmitter with a Class-D Amplifier for OFDM Transmission Yoshiharu IIKURA, Yohtaro UMEDA, Yusuke KOZAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Power amplifiers for wireless communication systems demand high power efficiency and linearity. Of the available types of high-efficiency switching-mode power amplifiers, envelope pulse-width modulation (EPWM) transmitter is advantageous because of their high power efficiency and linearity. In recent years, EPWM transmitter is studied for applying to orthogonal frequency-division multiplexing (OFDM) widely adopted in wireless communication systems. However, few error vector magnitude (EVM) evaluation with power amplifiers has been reported. This paper shows that the EVM performance of a class-D amplifier is superior to that of a class-E amplifier in a polar-modulation EPWM transmitter for OFDM transmission by computer simulation. In addition, power-added efficiency (PAE) and output power of the two amplifier classes are compared. The calculated EVM is more than 31 dB from 1 to 2.5 GHz with the class-D amplifier. In addition, to evaluate the characteristics of the transmitter and power amplifier when changing the sampling rate of the ΔΣ modulator. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | transmitter / power amplifier / OFDM / class-D / envelope pulse-width modulation / EPWM / error vector magnitude / power add efficiency |
| Paper # | MW2014-140 |
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| Conference Information | |
| Committee | MW |
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| Conference Date | 2014/11/13(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Microwaves (MW) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Polar-modulation EPWM Transmitter with a Class-D Amplifier for OFDM Transmission |
| Sub Title (in English) | |
| Keyword(1) | transmitter |
| Keyword(2) | power amplifier |
| Keyword(3) | OFDM |
| Keyword(4) | class-D |
| Keyword(5) | envelope pulse-width modulation |
| Keyword(6) | EPWM |
| Keyword(7) | error vector magnitude |
| Keyword(8) | power add efficiency |
| 1st Author's Name | Yoshiharu IIKURA |
| 1st Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science() |
| 2nd Author's Name | Yohtaro UMEDA |
| 2nd Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science |
| 3rd Author's Name | Yusuke KOZAWA |
| 3rd Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science |
| Date | 2014-11-21 |
| Paper # | MW2014-140 |
| Volume (vol) | vol.114 |
| Number (no) | 318 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |