| Presentation | 2009-08-04 A channel estimation scheme with a peak-to-average power ratio reduction in single carrier-frequency domain equalization using sparse pilot symbols Daiji MOTOKAWA, Eiji OKAMOTO, Yasunori IWANAMI, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In mobile communications, a frequency domain equalization for multipath fading is widely used in orthogonal frequency division multiplexing (OFDM). However, the peak-to-average power ratio (PAPR) of OFDM is relatively high due to the noise-like signal style of multi carrier (MC) transmission. On the other hand, PAPR of single carrier (SC) transmission is lower than that of MC and the SC is often applied to uplink transmission because of less requirement of amplifier linearity. In SC, the frequency domain equalizer called single carrier-frequency domain equalization (SC-FDE) is also used as well as MC, and to raise the transmission quality, an accurate channel estimation is required for it. From such a background, we proposed a sparse pilot symbol-based channel estimation scheme for SC-FDE using fast Fourier transform (FFT) in which the pilot symbols are inserted periodically in the time and frequency plane, and achieve more accurate equalization for uplink transmission. Using sparse pilot symbols on SC transmission improves frequency efficiency, but also, PAPR of that scheme becomes higher than PAPR of normal SC transmission. Therefore, in this paper, we propose a transmission scheme of SC-FDE with sparse pilot symbols using a new frame configuration and constant amplitude zero auto-correlation (CAZAC) pilot symbols. We introduce the discrete Fourier transform (DFT)-based discrete multiplexing of pilot symbols and the CAZAC-based sparse pilot symbols of SC-FDE for spectral efficiency and lower PAPR. The performance improvement is evaluated through computer simulations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SC-FDE / FFT / PAPR / CAZAC sequence |
| Paper # | RCS2009-106 |
| Date of Issue |
| Conference Information | |
| Committee | RCS |
|---|---|
| Conference Date | 2009/7/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A channel estimation scheme with a peak-to-average power ratio reduction in single carrier-frequency domain equalization using sparse pilot symbols |
| Sub Title (in English) | |
| Keyword(1) | SC-FDE |
| Keyword(2) | FFT |
| Keyword(3) | PAPR |
| Keyword(4) | CAZAC sequence |
| 1st Author's Name | Daiji MOTOKAWA |
| 1st Author's Affiliation | Graduate School of Nagoya Institute of Technology() |
| 2nd Author's Name | Eiji OKAMOTO |
| 2nd Author's Affiliation | Graduate School of Nagoya Institute of Technology |
| 3rd Author's Name | Yasunori IWANAMI |
| 3rd Author's Affiliation | Graduate School of Nagoya Institute of Technology |
| Date | 2009-08-04 |
| Paper # | RCS2009-106 |
| Volume (vol) | vol.109 |
| Number (no) | 164 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |