| 講演名 | 2007/10/25 Effect of Depolarization in a Dual-polarized Satellite System Employing Frequency Offset(Receiver Technology) , |
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| 抄録(英) | The degree of the depolarization is often specified by the cross-polarization discrimination (XPD), which is defined by the ratio of the received co-polar signal to the received cross-polar signal. However, since XPD is defined originally for a single frequency wave, previous XPD formulas can not be directly applied to estimate depolarization effects for the case in which one channel is partially spectrum-overlapped by the other channel. In this paper, therefore, based on the assumption that the depolarization-induced interference noise generated in the overlapped spectral region in a dual-polarized satellite system is an AWGN and spreads uniformly over the whole channel, we derive a new XPD formula that would be applicable to evaluate effective XPD for the frequency-offset dual-polarized channel, as well as XPD for the completely overlapped conventional dual-polarized channel. Then, by using the proposed formula, we evaluate the BER, C/I and E_b/N_o resulting from the frequency offset. Simulation results of this paper indicate that the approach of frequency offset in dual-polarized systems may significantly mitigate the impact of depolarization, with a price of a somewhat extended bandwidth. |
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| キーワード(英) | Depolarization / Dual-polarized satellite systems / Frequency Offset / XPD |
| 資料番号 | SAT2007-46 |
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| 研究会 | SAT |
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| 開催期間 | 2007/10/25(から1日開催) |
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| 申込み研究会 | Satellite Telecommunications (SAT) |
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| 本文の言語 | ENG |
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| タイトル（英） | Effect of Depolarization in a Dual-polarized Satellite System Employing Frequency Offset(Receiver Technology) |
| サブタイトル（和） | |
| キーワード(1)（和/英） | / Depolarization |
| 第 1 著者 氏名（和/英） | / Sang Gyu Lee |
| 第 1 著者 所属（和/英） | Korea Aerospace Research Institute |
| 発表年月日 | 2007/10/25 |
| 資料番号 | SAT2007-46 |
| 巻番号（vol） | vol.107 |
| 号番号（no） | 299 |
| ページ範囲 | pp.- |
| ページ数 | 7 |
| 発行日 | |