文章基本信息

标题：OFDM受信における遅延プロファイルとドップラープロファイルの推定によるキャリヤ間干渉の除去
本地全文：下载
作者：中村充 ; 伊丹誠 ; 伊藤紘二等
期刊名称：映像情報メディア学会誌
印刷版ISSN：1342-6907
电子版ISSN：1881-6908
出版年度：2002
卷号：56
期号：12
页码：1951-1958
DOI：10.3169/itej.56.1951
出版社：The Institute of Image Information and Television Engineers
摘要：During an OFDM transmission, a loss of sub-carrier orthogonality due to Doppler-spread of the channel leads to inter-carrier interference (ICI). This problem is especially bad in mobile reception environments. especially, under mobile reception environments. ICI causes significant degradation of the bit error rate characteristics and its influence becomes larger as the carrier frequency or velocity of the receiver increases. This paper proposes a method to reduce the ICI caused by the Doppler spread of the channel. The transmission channel is modeled by a combination of multiple Doppler shifted propagation paths, and their parameters such as attenuation, relative delay and Doppler-shift are estimated using scattered pilot symbols. The ICI is canceled by multiplying the inverse matrix of the estimated channel matrix with the received OFDM symbol vector. Computer simulation confirmed that the proposed method can reduce the bit error rate of a Doppler spread channel.
关键词：OFDM;ドップラーシフト;キャリヤ間干渉;伝送路推定