| Presentation | 2009-12-18 A Study on Quantization Noise Reduction of Delta-Sigma Modulator with Non-uniform Quantization Mao HAGIWARA, Toru KITAYABU, Hiroyasu ISHIKAWA, Hiroshi SHIRAI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, a novel delta-sigma modulator which has a non-uniform quantizer is proposed. A delta-sigma modulator is used in a transmitter which has a class-S power amplifier. The proposed delta-sigma modulator reduces the quantization noise which causes spurious emission compared to a delta-sigma modulator which has a uniform quantizer. The output values except the largest one and the threshold values of the non-uniform quantizer are determined using a probability density function of input signal. The largest output value is set to a certain value to make the delta-sigma modulator stable. Simulation results show that the proposed design reduces quantization noise 2.9 dB and 0.5 dB if the input signal is OFDM signal and QPSK signal, respectively compared to a delta-sigma modulator which has uniform quantizer. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Delta-sigma modulator / Quantization noise / Non-uniform quantizer / Class-S power amplifier |
| Paper # | RCS2009-197 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2009/12/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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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 Quantization Noise Reduction of Delta-Sigma Modulator with Non-uniform Quantization |
| Sub Title (in English) | |
| Keyword(1) | Delta-sigma modulator |
| Keyword(2) | Quantization noise |
| Keyword(3) | Non-uniform quantizer |
| Keyword(4) | Class-S power amplifier |
| 1st Author's Name | Mao HAGIWARA |
| 1st Author's Affiliation | Chuo University() |
| 2nd Author's Name | Toru KITAYABU |
| 2nd Author's Affiliation | KDDI R&D Laboratories |
| 3rd Author's Name | Hiroyasu ISHIKAWA |
| 3rd Author's Affiliation | Chuo University |
| 4th Author's Name | Hiroshi SHIRAI |
| 4th Author's Affiliation | Chuo University |
| Date | 2009-12-18 |
| Paper # | RCS2009-197 |
| Volume (vol) | vol.109 |
| Number (no) | 341 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |