用於多軌磁性記錄器之擬二維等化器

Abstract

磁頭位置偏差所造成的軌際干擾(ITI)在多軌通道系統中(例如磁碟機或數 位式緊密卡帶(DCC)往往是最主要的雜訊。 因此，等化器的設計必須同時 考慮到能處理符際干擾(ISI)和軌際干擾(ITI)。在論文中，我們提出了一 個擬二維最小均方(LMS)的適應性等化器。 因為它的電路複雜度較標準的 二維等化器來得簡單，所以特別適合於平行多輸入多輸出(MOMO)的使用。 從模擬的結果可看出，這個擬似二維等化器與二維等化器有一樣的表現。 Offtract or intertrack interference (ITI) is the result of recording head position error and is often the dominant noise source in multi-track channel such as magnetic-disk storage or digital compact cassette (DCC). Therefore, equalizers which are able to combat both ISI and ITI must be considered. In this thesis, we present a pseudo two-dimentional LMS adaptive equalizer suitable for multiple-input-multiple-output (MIMO) parallel requirement, with reduced complexity comparing with a 2-D equalizer structure. Simulation result shows that the performance of this equalizer is comparable to that of the 2-D equalizer.