| Presentation | 2007-05-25 Frequency Offset Estimation Scheme in the Presence of Time-varying DC Offset and IQ Imbalance for OFDM Direct Conversion Receivers Mamiko INAMORI, M. Anas BOSTAMAM, Yukitoshi SANADA, Hideki MINAMI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Cognitive radio enhances the flexibility of personal wireless services. To realize cognitive radio, OFDM direct conversion architecture should be investigated. Though this architecture gives flexibility and reduces cost and power consumption, it may suffer from DC offset, frequency offset, and IQ imbalance. This paper presents a frequency offset estimation scheme for OFDM direct conversion receivers. In this paper, a frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance is proposed. The novelty of this scheme is in its usage of a differential filter to reduce DC offset. Evaluation of the presented estimation scheme is carried out on an OFDM communication system designed to the specifications of the IEEE 802.11a/g standard for WLANs. Numerical results through computer simulation show that the proposed frequency offset estimation scheme works well even with large DC offset and IQ imbalance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Direct Conversion / OFDM / DC Offset / Frequency Offset / IQ Imbalance / Training Sequence |
| Paper # | SR2007-15 |
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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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| Paper Information | |
| 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) | Frequency Offset Estimation Scheme in the Presence of Time-varying DC Offset and IQ Imbalance for OFDM Direct Conversion Receivers |
| Sub Title (in English) | |
| Keyword(1) | Direct Conversion |
| Keyword(2) | OFDM |
| Keyword(3) | DC Offset |
| Keyword(4) | Frequency Offset |
| Keyword(5) | IQ Imbalance |
| Keyword(6) | Training Sequence |
| 1st Author's Name | Mamiko INAMORI |
| 1st Author's Affiliation | Dept. of Electronics and Electrical Engineering, Keio University() |
| 2nd Author's Name | M. Anas BOSTAMAM |
| 2nd Author's Affiliation | Dept. of Electronics and Electrical Engineering, Keio University |
| 3rd Author's Name | Yukitoshi SANADA |
| 3rd Author's Affiliation | Dept. of Electronics and Electrical Engineering, Keio University:Sony Computer Science Laboratories, Inc. |
| 4th Author's Name | Hideki MINAMI |
| 4th Author's Affiliation | Sony Corporation |
| Date | 2007-05-25 |
| Paper # | SR2007-15 |
| Volume (vol) | vol.107 |
| Number (no) | 69 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |