| Presentation | 2022-03-04 OFDM Wireless Receivers based on Time-to-Digital Conversion Yang Yang, Fukawa Kazuhiko, Chang Yuyuan, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To aim at low-cost OFDM wireless receivers with low-power, the report investigates a new analog-to-digital converter (ADC) scheme based on real zero (RZ) techniques. This scheme exploits the crossing time called RZ between reference and bandpass signals in order to recover the baseband signals from the received bandpass signals, which is referred to as the RZ time-to-digital converter (TDC). Since RZ TDC mainly uses one comparator for detecting RZs, it can be classified as one-bit ADC like Delta-Sigma ADC. Considering this similarity, the report compares the required frequency of the sampling clock of Delta-Sigma ADC with that of the clock to measure RZs by a counter of RZ TDC for an OFDM receiver. Computer simulations show that the mean squared error (MSE) performance of both the schemes improves with an increase in the above frequencies. It is also demonstrated that RZ TDC is superior to Delta-Sigma ADC in terms of both the MSE and bit error rate (BER). Furthermore, this report also proposes a new structure of the counter along with a delay circuit array, which does not require very high frequency clock for RZ TDC when it is applied to radio frequency (RF) signals. Therefore, it can reduce power consumption caused by such a clock frequency. Since this application can also remove ADCs and the demodulator, it can reduce the number of analog circuits in wireless OFDM receivers |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDM / real-zero TDC / Delta-Sigma ADC / delay circuits / clock frequency / sampling frequency |
| Paper # | RCS2021-292 |
| Date of Issue | 2022-02-23 (RCS) |
| Conference Information | |
| Committee | RCS / SR / SRW |
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| Conference Date | 2022/3/2(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) / Suguru Kameda(Hiroshima Univ.) / Hanako Noda(Anritsu) |
| Vice Chair | Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR) / Keiichi Mizutani(Kyoto Univ.) / Kentaro Saito(Tokyo Denki Univ.) / Hirokazu Sawada(NICT) |
| Secretary | Toshihiko Nishimura(NEC) / Tomoya Tandai(Panasonic) / Fumihide Kojima(Mie Univ.) / Osamu Takyu(Tokai Univ.) / Kentaro Ishidu(NTT) / Kazuto Yano(NTT) / Keiichi Mizutani(NIigata Univ.) / Kentaro Saito / Hirokazu Sawada |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Mai Ohta(Fukuoka Univ.) / Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) / Akihito Noda(Nanzan Univ.) |
| 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 | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | OFDM Wireless Receivers based on Time-to-Digital Conversion |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | real-zero TDC |
| Keyword(3) | Delta-Sigma ADC |
| Keyword(4) | delay circuits |
| Keyword(5) | clock frequency |
| Keyword(6) | sampling frequency |
| 1st Author's Name | Yang Yang |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Inst. of Tech.) |
| 2nd Author's Name | Fukawa Kazuhiko |
| 2nd Author's Affiliation | Tokyo Institute of Technology(Tokyo Inst. of Tech.) |
| 3rd Author's Name | Chang Yuyuan |
| 3rd Author's Affiliation | Tokyo Institute of Technology(Tokyo Inst. of Tech.) |
| Date | 2022-03-04 |
| Paper # | RCS2021-292 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-391 |
| Page | pp.pp.201-206(RCS), |
| #Pages | 6 |
| Date of Issue | 2022-02-23 (RCS) |