| Presentation | 2017-09-22 A Study on the SNR in Higher Nyquist Zone of 1-Bit Band-Pass Delta-Sigma Modulator using Manchester Coding Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A 1-bit $delta$$sigma$ modulator using the first Nyquist zone has been reported as a method of directly generating an RF signal. If the image signal generated in the higher Nyquist zone can be used as the transmission signal, it is possible to output a signal beyond the Nyquist frequency. However, it is attenuated due to the frequency response of Non Return to Zero (NRZ) sinc function, and the SNR is degraded. In order to increase the power of the image signal, Return to Zero (RZ)-DAC is proposed and demonstrate using holding pulse with duty ratio of 50% or less. In this paper, we propose using Manchester coding with NRZ output to obtain higher power image signal than RZ-DAC in the specific Nyquist zone. We observe the SNR of 1-bit band-pass delta-sigma DAC in higher order Nyquist zone in the measurement. With the proposed method, we show the power enhancement of image signals around the odd-numbered sampling frequency. By using 1Vp-p / 8GS/s band pass $delta$$sigma$ DAC with proposed method, we confirmed that the SNR of 42 dB could be obtained in the 7th Nyquist zone (26.01 GHz). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Digital to Analog converter / digital to RF / delta-sigma / 1-bit / image / transmitters / microwaves |
| Paper # | MW2017-73 |
| Date of Issue | 2017-09-14 (MW) |
| Conference Information | |
| Committee | AP / MW |
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| Conference Date | 2017/9/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Saitama University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave, Millimeter wave, Measurement, Antennas and Propagation |
| Chair | Jiro Hirokawa(Tokyo Tech.) / Masahiro Muraguchi(TUC) |
| Vice Chair | Ryo Yamaguchi(SoftBank) / Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTTdocomo) / Kenichi Tajima(Mitsubishi Electric) |
| Secretary | Ryo Yamaguchi(NTT DoCoMo) / Yoshinori Kogami(Saitama Univ.) / Hiroshi Okazaki(Tokyo Inst. of Tech.) / Kenichi Tajima(HITACHI) |
| Assistant | Nobuyasu Takemura(Nippon Inst. of Tech.) / Satoshi Yamaguchi(Mitsubishi Electric) / Satoshi Ono(Univ. of Electro-Comm.) / Mizuki Motoyoshi(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Antennas and Propagation / Technical Committee on Microwaves |
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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 the SNR in Higher Nyquist Zone of 1-Bit Band-Pass Delta-Sigma Modulator using Manchester Coding |
| Sub Title (in English) | |
| Keyword(1) | Digital to Analog converter |
| Keyword(2) | digital to RF |
| Keyword(3) | delta-sigma |
| Keyword(4) | 1-bit |
| Keyword(5) | image |
| Keyword(6) | transmitters |
| Keyword(7) | microwaves |
| 1st Author's Name | Masafumi Kazuno |
| 1st Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 2nd Author's Name | Mizuki Motoyoshi |
| 2nd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 3rd Author's Name | Suguru Kameda |
| 3rd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 4th Author's Name | Noriharu Suematsu |
| 4th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| Date | 2017-09-22 |
| Paper # | MW2017-73 |
| Volume (vol) | vol.117 |
| Number (no) | MW-216 |
| Page | pp.pp.29-34(MW), |
| #Pages | 6 |
| Date of Issue | 2017-09-14 (MW) |