Fractional Sampling OFDM受信機におけるサンプル点選択法の一検討

摘要

Fractional Sampling（FS）はOFDM受信機において，マルチパスを分解し1アンテナ素子でダイバーシチを達成する技術として提案されている．本研究では，チャネルの周波数応答に応じたサンプル点選択法の一検討を提案する．提案方式は特にオーバーサンプリング比率が小さいとき，遅延スプレッドが大きいチャネルにおいてBER特性を改善する．%A fractional sampling scheme in an OFDM receiver has been proposed to separate multipath components and achieve path diversity with a single antenna. In this paper, a novel sampling point selection scheme according to the frequency response of a channel is proposed. Numerical results through computer simulation show that the proposed sampling point selection scheme improves the BER performance especially when an oversamping ratio is small. It also works well over the channel with larger number of multipath components.