| Presentation | 2008-08-27 In-Band Noise Analysis and Peak-Clipping Effect on Envelope Pulse-Width Modulation (EPWM) Transmitter Edwin M. UMALI, Koji KAWAZOE, Yoshikazu TOYAMA, Yasushi YAMAO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The Envelope Pulse-Width Modulation (EPWM) transmitter enables a highly efficient linear amplification. Noise characteristics of a 1st order delta-sigma (Δ-Σ) modulator EPWM transmitter have been presented. However, in this paper, a different approach to analyzing the in-band noise characteristics of first-order and higher-order Δ-Σ modulators is introduced. The quantizer is modeled as a linear gain plus noise. The effective quantizer gain which can only be obtained through simulations can be used to adjust theoretical values. Distortion noise introduced by envelope clipping is also considered. From the simulation results on the IEEE 802.11a OFDM system, the effective quantizer gain is less than one for 2^ |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | RF transmitter / power efficiency / EPWM / OFDM / delta-sigma modulator |
| Paper # | RCS2008-68 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2008/8/20(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 | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | In-Band Noise Analysis and Peak-Clipping Effect on Envelope Pulse-Width Modulation (EPWM) Transmitter |
| Sub Title (in English) | |
| Keyword(1) | RF transmitter |
| Keyword(2) | power efficiency |
| Keyword(3) | EPWM |
| Keyword(4) | OFDM |
| Keyword(5) | delta-sigma modulator |
| 1st Author's Name | Edwin M. UMALI |
| 1st Author's Affiliation | Advanced Wireless Communication Research Center, The University of Electro-Communications() |
| 2nd Author's Name | Koji KAWAZOE |
| 2nd Author's Affiliation | Advanced Wireless Communication Research Center, The University of Electro-Communications |
| 3rd Author's Name | Yoshikazu TOYAMA |
| 3rd Author's Affiliation | Advanced Wireless Communication Research Center, The University of Electro-Communications |
| 4th Author's Name | Yasushi YAMAO |
| 4th Author's Affiliation | Advanced Wireless Communication Research Center, The University of Electro-Communications |
| Date | 2008-08-27 |
| Paper # | RCS2008-68 |
| Volume (vol) | vol.108 |
| Number (no) | 188 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |