Adaptive Subcarrier Block Modulation with Differentially Modulated Pilot Symbol Assistance for Downlink OFDM Using Uplink Delay Spread

URI http://harp.lib.hiroshima-u.ac.jp/hiroshima-cu/metadata/4060
ファイル
タイトル
Adaptive Subcarrier Block Modulation with Differentially Modulated Pilot Symbol Assistance for Downlink OFDM Using Uplink Delay Spread
著者
氏名 AHN Chang-Jun
ヨミ アン チャンジュン
別名 安 昌俊
氏名 TAKAHASHI Satoshi
ヨミ タカハシ サトシ
別名 高橋 賢
氏名 HARADA Hiroshi
ヨミ ハラダ ヒロシ
別名 原田 博司
氏名 KAMIO Yukiyoshi
ヨミ カミオ ユキヨシ
別名 神尾 享秀
氏名 SASASE Iwao
ヨミ ササセ イワオ
別名 笹瀬 巌
キーワード
DMPSA-ASMS/OFDM
MLI
coherence bandwidth
RMS delay spread
抄録

In AMS/OFDM systems, base station is in control of the modulation level of each subcarrier, 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 subcarrier frequency is not supposed to be totally different from its neighboring frequencies, and hence, they must have correlation which depends on the coherence bandwidth of the channel Bc. If we could assign the same modulation level for coherently faded subcarrier block, MLI is required only one time for each subcarrier 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 subcarrier block modulation with differentially modulated pilot symbol assistance for downlink OFDM using uplink delay spread.

査読の有無
掲載雑誌名
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
E88-A
7
開始ページ
1889
終了ページ
1896
出版年月日
2005-07-01
出版者
電子情報通信学会(IEICE)
ISSN
0916-8508
NCID
AA10826239
本文言語
英語
資料タイプ
学術雑誌論文
著者版フラグ
出版社版
権利情報
copyright©2005 IEICE
関連URL
旧URI
区分
hiroshima-cu