| 講演名 | 2007/10/25 Design of spectrum spreading technique applied to DVB-S2(Coding Technology) , |
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| 抄録(英) | Spectrum spreading, in its general form, can be conceived as an artificial expansion of the signal bandwidth with respect to the minimum Nyquist band required to transmit the desired information. Spreading can be functional to several objectives, including resilience to interference and jammers and reduction of power spectral density levels. In the paper, signal spreading is manly used for increasing the received energy, thus satisfying link budget constraints, for terminals with low aperture antennas, without increasing the transmitted EIRP. As a matter of fact, in many mobile scenarios, even when MODCOD configurations with very low spectral efficiency (i.e. QPSK-1/4) in DVB-S2 standard, are used, the link budget cannot be closed. Spectrum spreading has been recently proposed as a technique to improve system performance without introducing additional MODCOD configurations under the constraint of fixed power spectrum density level at the transmitter side. To this aim, the design of spectrum spreading techniques shall keep into consideration requirements such as spectrum mask, physical layer performance, link budget, hardware reuse, robustness, complexity, and backward compliance with existing commercial equipments. The proposed implementation allows to fully reuse the standard DVB-S2 circuitry and is inserted as an 'inner layer' in the standard DVB-S2 chain. |
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| キーワード(英) | DVB-S2 / mobile environment / spectrum spreading / DS (Direct Sequence) technique / interference mitigation |
| 資料番号 | SAT2007-28 |
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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） | Design of spectrum spreading technique applied to DVB-S2(Coding Technology) |
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| キーワード(1)（和/英） | / DVB-S2 |
| 第 1 著者 氏名（和/英） | / Pansoo Kim |
| 第 1 著者 所属（和/英） | Radio & Broadband Research Division, ETRI |
| 発表年月日 | 2007/10/25 |
| 資料番号 | SAT2007-28 |
| 巻番号（vol） | vol.107 |
| 号番号（no） | 299 |
| ページ範囲 | pp.- |
| ページ数 | 8 |
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