Theoretical Analysis of Decision Directed Block Iterative Channel Estimation for OFDM Mobile Radio(Wireless Communication Technologies)
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概要
- 論文の詳細を見る
Orthogonal frequency division multiplexing (OFDM) is one of the promising transmission techniques for next generation mobile communication systems. Accurate channel estimation is essential for coherent OFDM signal transmission. So far, many pilot-assisted channel estimation schemes have been proposed. In the case of packet transmission, each received packet can be repeatedly processed by decision feedback to improve the channel estimation accuracy, resulting in a decision directed block iterative channel estimation (DD-BICE). However, decision feedback of erroneously detected data symbols degrades the packet error rate (PER) or bit error rate (BER) performance. In this paper, theoretical analysis is presented for the DD-BICE taking into account the decision feedback errors assuming quadrature phase shift keying (QPSK) data modulation. A 2-dimensional (2D) averaging filter is used for reducing the negative impact of decision feedback errors. The impacts of 2D averaging filter and antenna diversity reception are discussed and the validity of the theoretical analysis is confirmed by computer simulation.
- 社団法人電子情報通信学会の論文
- 2007-07-01
著者
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Adachi Koichi
Department Of Information And Computer Science Keio University
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Nakagawa Masao
Department Of Information And Computer Science Faculty Of Science And Technology Keio University
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Adachi Koichi
Department Of Cardiovascular Surgery Saitama Medical Center Jichi Medical University
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Nakagawa Masao
Department Of Gastroenterology And Hematology Hokkaido University Graduate School Of Medicine
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Nakagawa Masao
Department Of Elect.engineering Keis University
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