Rate Conversion in Echo Cancellation for ADSL based on DMT

• Main Authors: Zi-Yi Lee, 李子沂
• Other Authors: Wen-Thong Chang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/09789451954451944512

碩士 === 國立交通大學 === 電信工程系 === 90 === Abstract Due to I.S.I. (Intersymbol Interference) between adjacent blocks for ADSL based on DMT (Discrete Multitone), we can corresponsively use tail cancellation and cyclic reconstruction in time domain and LMS algorithm in frequency domain for echo cancellation. When compared with traditional equalizer only in time domain or frequency domain, it would reduce the computing complexity. For ADSL, the rate conversion between transceiver and receiver must match before echo cancellation. In the thesis, we research the rate conversion and expand interpolation, poly-phase form, for reducing the computing complexity.