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
開催期間 2003/10/16(から1日開催)
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開催地(英)
テーマ(和)
テーマ(英)
委員長氏名(和)
委員長氏名(英)
副委員長氏名(和)
副委員長氏名(英)
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講演論文情報詳細
申込み研究会 Satellite Telecommunications (SAT)
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