| Presentation | 2014-08-19 Digitally Enhanced Harmonic Transmitter of 1-bit Bandpass ΔΣ Modulator Takashi MAEHATA, Suguru KAMEDA, Noriharu SUEMATSU, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A 1-bit digital radio frequency transmitter (1-bit DRF) using a band-pass delta sigma modulator can directly output a modulated RF signal without a digital to analog converter, a mixer and a local. This signal consists of a 1-bit digital train with a rectangular waveform in time domain and also includes the RF signal in frequency domain. It can be reconstructed as an RF signal by a band-pass filter (BPF), whose carrier frequency is continuously tunable. However, most of all, this frequency is less than a data rate because the signal strength decreases according to an increase in the carrier frequency. We therefore have to use a higher data rate or a frequency converter if we need to transmit a higher frequency over a data rate. In this paper, we propose a digitally enhanced harmonic transmitter of 1-bit DRF. This transmitter emphasizes high order harmonic frequency components in the rectangular waveform by shortening the duration time of each 1 bit. We have shown a block diagram of the transmitter and estimated its performance by simulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Bandpass / delta-sigma modulator / D/A converter / feedforward / distortion compensation |
| Paper # | SAT2014-27 |
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| Committee | SAT |
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| Conference Date | 2014/8/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Satellite Telecommunications (SAT) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Digitally Enhanced Harmonic Transmitter of 1-bit Bandpass ΔΣ Modulator |
| Sub Title (in English) | |
| Keyword(1) | Bandpass |
| Keyword(2) | delta-sigma modulator |
| Keyword(3) | D/A converter |
| Keyword(4) | feedforward |
| Keyword(5) | distortion compensation |
| 1st Author's Name | Takashi MAEHATA |
| 1st Author's Affiliation | Inforcommunications and Social Infrastructure systems R&D Center, Sumitomo Electric Industries, Ltd() |
| 2nd Author's Name | Suguru KAMEDA |
| 2nd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 3rd Author's Name | Noriharu SUEMATSU |
| 3rd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| Date | 2014-08-19 |
| Paper # | SAT2014-27 |
| Volume (vol) | vol.114 |
| Number (no) | 179 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |