| Presentation | 2008-12-18 Noise Characteristics of OFDM Signal Generated by EPWM Transmitter Employing Second-order Delta-Sigma Modulator with Null-Response Frequency Koji KAWAZOE, Yoshikazu TOYAMA, Edwin M. UMALI, Yasushi YAMAO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | OFDM achieves high spectral efficiency in wireless communication systems. However, it has large PAPR and a linear amplifier is required. Current linear amplifiers for OFDM signals suffer low power efficiency. Envelope Pulse-Width Modulation (EPWM) transmitters have been proposed to obtain high power efficiency for the amplification of OFDM signals. This paper proposes an EPWM transmitter with 2nd-order Δ-Σ modulator with a null-response frequency. The quantization noise from the Δ-Σ modulator is analyzed and minimized in both the signal and adjacent channel bands. EPWM transmitter output signal is simulated for the actual format OFDM signal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDM / EPWM / Δ-Σ Modulator / Quantization Noise |
| Paper # | RCS2008-155 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2008/12/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| 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) | Noise Characteristics of OFDM Signal Generated by EPWM Transmitter Employing Second-order Delta-Sigma Modulator with Null-Response Frequency |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | EPWM |
| Keyword(3) | Δ-Σ Modulator |
| Keyword(4) | Quantization Noise |
| 1st Author's Name | Koji KAWAZOE |
| 1st Author's Affiliation | Advanced Wireless Communication Research Center, the University of Electro-Communications() |
| 2nd Author's Name | Yoshikazu TOYAMA |
| 2nd Author's Affiliation | Advanced Wireless Communication Research Center, the University of Electro-Communications |
| 3rd Author's Name | Edwin M. UMALI |
| 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 | 2008-12-18 |
| Paper # | RCS2008-155 |
| Volume (vol) | vol.108 |
| Number (no) | 358 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |