Journal of Signal Processing
Online ISSN : 1880-1013
Print ISSN : 1342-6230
ISSN-L : 1342-6230
QAM-OFDMシステムのブラインドチャンネル推定
田中 宏典十川 勇人岩崎 宣生松崎 隆哲白土 浩五反田 博
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2014 年 18 巻 2 号 p. 77-88

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In the present paper, a blind method is proposed to estimate QAM-OFDM channels of which transmitting and receiving stations are in line-of-sight, under the assumptions: i) the absolute value of phase rotation is less than π/2 at all sub-channels, and ii) for at least one sub-channel among them, it is less than π/4. From several simulation results for 50 sub-carriers with 16 QAM using 2048 OFDM blocks, it is confirmed that, when the SNR (Signal-to-Noise Ratio) in baseband region is over 20[dB], the QAM-OFDM channel is estimated at high precision by the proposed method and the restored symbols resulting from the channel estimates give the bit-error-rate about 10-3 or less at SNR≥20[dB].

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© 2014 信号処理学会
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