| Presentation | 2009-05-28 Frequency Domain IQ Imbalance Estimation Scheme in the Presence of DC Offset and Frequency Offset Mamiko INAMORI, Shuzo TAKAYAMA, Yukitoshi SANADA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Direct conversion receivers in orthogonal frequency division multiplexing (OFDM) systems suffer from direct current (DC) offset, frequency offset, and IQ imbalance. We have proposed an IQ imbalance estimation scheme in the presence of DC offset and frequency offset, which uses preamble signals in the time domain. In this scheme, the DC offset is eliminated by a differential filter. However, the accuracy of IQ imbalance estimation is deteriorated when the frequency offset is small. To overcome this problem, a new IQ imbalance estimation scheme in the frequency domain has been proposed in this paper. The IQ imbalance is estimated with pilot subcarriers. Numerical results obtained through computer simulation show that estimation accuracy and bit error rate (BER) performance can be improved even if the frequency offset is small. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Direct Conversion / OFDM / DC Offset / Frequency Offset / IQ Imbalance / Pilot Symbols |
| Paper # | SR2009-6 |
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| Conference Information | |
| Committee | SR |
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| Conference Date | 2009/5/21(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 Domain IQ Imbalance Estimation Scheme in the Presence of DC Offset and Frequency Offset |
| 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) | Pilot Symbols |
| 1st Author's Name | Mamiko INAMORI |
| 1st Author's Affiliation | Dept. of Electronics and Electrical Engineering, Keio University() |
| 2nd Author's Name | Shuzo TAKAYAMA |
| 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 |
| Date | 2009-05-28 |
| Paper # | SR2009-6 |
| Volume (vol) | vol.109 |
| Number (no) | 61 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |