講演名 | 2003/10/16 Adaptive MC-CDMA for Broadband Mobile Satellite Systems(Trancemission & Access Method) , |
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抄録(和) | |
抄録(英) | This paper proposes an adaptive MC-CDMA system for broadband mobile satellite communications. The proposed system can fully utilize high degree of freedom offered by multi-carrier schemes, and thus can provide more efficient adaptive transmissions. We assumed multi-beam geo-stationary satellite, and focused on the service provided via forward link. Although, typically, line-of-sight (LOS) conditions prevails in satellite systems, we cannot ignore the link quality degradation due to multipath propagation when we consider a large bandwidth of several tens of MHz for high rate services and services for users even under no LOS conditions. This leads to using a MC-CDMA transmission in mobile satellite systems in spite of its inherent disadvantages. Our simulation results reveal that the proposed adaptive scheme with the synchronous system achieves 100 % enhancement in capacity. In order to overcome existing problems of multi-carrier schemes, we also propose several novel algorithms to reduce signal distortions due to high peak to average power ratio (PAPR) in the MC-CDMA. These algorithms include a scrambling technique and a partial transmit sequence technique to reduce PAPR, and a predistortion technique to linearize high power amplifier. |
キーワード(和) | |
キーワード(英) | Mobile satellite system / Adaptive MC-CDMA |
資料番号 | SAT2003-119 |
発行日 |
研究会情報 | |
研究会 | SAT |
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開催期間 | 2003/10/16(から1日開催) |
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幹事氏名(和) | |
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講演論文情報詳細 | |
申込み研究会 | Satellite Telecommunications (SAT) |
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本文の言語 | ENG |
タイトル(和) | |
サブタイトル(和) | |
タイトル(英) | Adaptive MC-CDMA for Broadband Mobile Satellite Systems(Trancemission & Access Method) |
サブタイトル(和) | |
キーワード(1)(和/英) | / Mobile satellite system |
第 1 著者 氏名(和/英) | / Kunseok Kang |
第 1 著者 所属(和/英) | Radio Broadcasting Research Laboratory, ETRI |
発表年月日 | 2003/10/16 |
資料番号 | SAT2003-119 |
巻番号(vol) | vol.103 |
号番号(no) | 385 |
ページ範囲 | pp.- |
ページ数 | 7 |
発行日 |