| Presentation | 2005-06-17 Adaptive switching DC offset canceller and its verification for the Direct-Conversion Receiver Kazuhiko TAMESUE, Masahiro MORIYA, Takuro SATO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The direct-conversion receiver takes the base-band signal directly by mixing the carrier frequency with local frequency directly, since the image rejection BPF, SAW filter and IF process and its BPF for the super-heterodyne receiver are not needed the direct-conversion receiver is very useful technology for mobile communication to realize low power consumption, small size and low cost. However, since it's known that the DC offset distortion occurred by the self-mixing of signal leakage between LO and signal path, and strong interferer during the reception causes the receiver performance degradation, in principle, the minimization of the degradation is the important problem for applying the direct-conversion for the communication system that requires high quality of receiver performance. Therefore, in this paper, we analyze the factor of the DC offset voltage from the experiment, and propose the DC offset canceller that changes the cancellation algorithm adaptively based on the estimated distortion within the burst by the digital base-band I/Q complex symbols. In addition to it, we clarify the effeteness to the receiver Bit Error Rate under the condition that DC offset voltage is constant and fluctuates from the computer simulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | direct conversion / self-mixing / DC offset / digital base-band |
| Paper # | RCS2005-27 |
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| Committee | RCS |
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| Conference Date | 2005/6/10(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) | Adaptive switching DC offset canceller and its verification for the Direct-Conversion Receiver |
| Sub Title (in English) | |
| Keyword(1) | direct conversion |
| Keyword(2) | self-mixing |
| Keyword(3) | DC offset |
| Keyword(4) | digital base-band |
| 1st Author's Name | Kazuhiko TAMESUE |
| 1st Author's Affiliation | Panasonic Mobile Communications Co., Ltd.() |
| 2nd Author's Name | Masahiro MORIYA |
| 2nd Author's Affiliation | Panasonic Mobile Communications Co., Ltd. |
| 3rd Author's Name | Takuro SATO |
| 3rd Author's Affiliation | Waseda University GITS |
| Date | 2005-06-17 |
| Paper # | RCS2005-27 |
| Volume (vol) | vol.105 |
| Number (no) | 121 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |