Weight tracking method for OFDM adaptive array in time variant fading channel

T. Hiramoto, A. Mizuki, M. Shibahara, T. Fujii, Iwao Sasase

研究成果: Conference contribution

抄録

In an orthogonal frequency division multiplexing (OFDM) system, in order to remove the influence of co-channel interference (CCI), the minimum mean square error-adaptive array antenna (MMSE-AAA) is attractive. To get the space diversity gain, the distance between adjacent elements should be set to be more than several wavelengths. However, it is difficult to derive the optimal weights with a few training symbols because the fading status is independent in each element. As a result, the bit error rate (BER) performance is deteriorated. We propose a novel weight tracking method to achieve space diversity gain and fast convergence with a few pilot symbols. In the proposed method, before updating the weight, channel estimation is applied to track the multipath fading of the desired signals. By computer simulation, we show that the proposed system improves the BER performance compared to the conventional system without channel estimation, even if the Doppler frequency is high.

本文言語English
ホスト出版物のタイトル2002 4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002
出版社Institute of Electrical and Electronics Engineers Inc.
ページ611-615
ページ数5
ISBN(印刷版)0780376056, 9780780376052
DOI
出版ステータスPublished - 2002
イベント4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002 - Stockholm, Sweden
継続期間: 2002 9 92002 9 11

Other

Other4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002
国/地域Sweden
CityStockholm
Period02/9/902/9/11

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信

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