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 |
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開催期間 | 2005/1/21(から1日開催) |
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講演論文情報詳細 | |
申込み研究会 | Radio Communication Systems (RCS) |
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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 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 |