文章基本信息

标题：フェージング伝送路におけるOFDM用等化器の性能向上に関する一検討
本地全文：下载
作者：山本昭夫 ; 西村恵造
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：1999
卷号：53
期号：11
页码：1557-1565
DOI：10.3169/itej.53.1557
出版社：The Institute of Image Information and Television Engineers
摘要：We have studied frequency-and time-domain equalization techniques under fading conditions for the European DVB-T OFDM system. We first describe a frequency-domain equalizer using simplified linear interpolation in the symbol direction that estimates the channel response of receiving-data carriers by using the pilot-carrier channel response. We calculated the signal-to-interference ratio (SIR) and the bit error rate (BER) over one-path and two-path Rayleigh-fading channels. We found that an SIR of about 20 dB and a BER of less than 1.5 × 10^-3 (QPSK and 16 QAM) are obtained even for a maximum doppler frequency of 50 Hz in a 2-k FFT system. We next describe a simplified time-domain equalizer using step interpolation over the OFDM useful period. A simulated BER of 2 × 10^-3 (QPSK) over one-path Rayleigh-fading channels ( fd =50 Hz) was attained for an 8-k FFT system, when the new time-domain and frequency-domain equalizer techniques were applied.
关键词：OFDM等化器;簡易形直線補間;周波数領域等化;時間領域等化