| Presentation | 2007-05-25 AID Converter Clipping Noise Suppression for High-Sensitivity Carrier-Sensing of Cognitive Radio Transceiver Tazuko TOMIOKA, Ren SAKATA, Tomoya HORIGUCHI, Takeshi TOMIZAWA, Kaoru INOUE, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A technique for suppressing the clipping noise of an analogue to digital converter(ADC) is proposed to achieve the high-sensitivity carrier-sensing of a cognitive radio transceiver. When a large bandwidth cognitive radio transceiver performs carrier-sensing, it must receive a radio wave that includes many primary user transmissions. The radio wave may have high peak to average power ratio and clipping noise may be generated. Clipping noise becomes an obstacle to the achievement of high-sensitivity carrier-sensing. In the proposed technique, the original values of the samples clipped by an ADC are estimated by interpolation. Polynomial spline interpolation to the clipped signal is performed in the first step, and then SINC function interpolation is applied to the spline interpolated signal. The performance was evaluated and about 20 dB suppression of clipping noise was achieved with the medium degree of clipping. With this technique, quantization bits may be reduced by about two bits depending on the assumed margin. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cognitive Radio / Carrier-Sensing / Analogue-to-Digital Converter / Clipping / Interpolation |
| Paper # | SR2007-16 |
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| Committee | SR |
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| Conference Date | 2007/5/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Software Radio(SR) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | AID Converter Clipping Noise Suppression for High-Sensitivity Carrier-Sensing of Cognitive Radio Transceiver |
| Sub Title (in English) | |
| Keyword(1) | Cognitive Radio |
| Keyword(2) | Carrier-Sensing |
| Keyword(3) | Analogue-to-Digital Converter |
| Keyword(4) | Clipping |
| Keyword(5) | Interpolation |
| 1st Author's Name | Tazuko TOMIOKA |
| 1st Author's Affiliation | Corporate Research And Development Center, Toshiba Corp.() |
| 2nd Author's Name | Ren SAKATA |
| 2nd Author's Affiliation | Corporate Research And Development Center, Toshiba Corp. |
| 3rd Author's Name | Tomoya HORIGUCHI |
| 3rd Author's Affiliation | Corporate Research And Development Center, Toshiba Corp. |
| 4th Author's Name | Takeshi TOMIZAWA |
| 4th Author's Affiliation | Corporate Research And Development Center, Toshiba Corp. |
| 5th Author's Name | Kaoru INOUE |
| 5th Author's Affiliation | Corporate Research And Development Center, Toshiba Corp. |
| Date | 2007-05-25 |
| Paper # | SR2007-16 |
| Volume (vol) | vol.107 |
| Number (no) | 69 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |