Abstract
周波数選択性通信路における高速OFDM伝送では，通信路のインパルス応答長が想定以上に長い場合，ブロック間干渉による性能劣化が起こり得る．本稿では，ブロック間干渉の影響を時間領域線形フィルタを用いて低減する通信路短縮の考え方と具体的な手法について説明する．まず，通信路が既知の場合に適用可能な通信路短縮法を幾つか紹介する．次に，パイロットシンボルや通信路の知識を必要としないブラインド通信路短縮法を幾つか紹介する．
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