講演名 2005-01-28
Adaptive Sub-carrier Block Modulation with Differentially Modulated Pilot Symbol Assistance for Down-link OFDM Using Up-link Delay Spread
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抄録(和)
抄録(英) In an AMS/OFDM system, base station is in control of the modulation level of each sub-carrier, and then, adaptive modulated packet is transmitted from the base station to the mobile station. In this case, the mobile station is required the modulation level information (MLI) to demodulate the received packet. The MLI is generally transmitted as a data symbol, therefore, the throughput is degraded. In an OFDM, the channel response at a particular sub-carrier frequency is not supposed to be totally different from its neighboring frequencies, and hence, they must have correlation that depends on the coherence bandwidth of the channel Bc. If we could assign the same modulation level for coherently faded sub-carrier block, MLI is required only one time for each sub-carrier block. Moreover, we can assign the data on the empty space of pilot signals for increasing the total transmission. In this paper, we propose an adaptive sub-carrier block modulation with differentially modulated pilot symbol assistance for downlink OFDM using up-link delay spread.
キーワード(和)
キーワード(英) DMPSA-ASMS/OFDM / MLI / Coherence Bandwidth / RMS Delay Spread
資料番号 CS2004-191,RCS2004-298
発行日

研究会情報
研究会 RCS
開催期間 2005/1/21(から1日開催)
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開催地(英)
テーマ(和)
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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)
幹事氏名(和)
幹事氏名(英)
幹事補佐氏名(和)
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講演論文情報詳細
申込み研究会 Radio Communication Systems (RCS)
本文の言語 ENG
タイトル(和)
サブタイトル(和)
タイトル(英) Adaptive Sub-carrier Block Modulation with Differentially Modulated Pilot Symbol Assistance for Down-link OFDM Using Up-link Delay Spread
サブタイトル(和)
キーワード(1)(和/英) / DMPSA-ASMS/OFDM
第 1 著者 氏名(和/英) / Chang-Jun AHN
第 1 著者 所属(和/英)
National Institute of Information and Communications Technology
発表年月日 2005-01-28
資料番号 CS2004-191,RCS2004-298
巻番号(vol) vol.104
号番号(no) 599
ページ範囲 pp.-
ページ数 6
発行日