Three kind of channel encode/decode technologies are researched which are TCM(Trellis Coded Modulation) and Viterbi decode, Reed-Solomn encode/decode and CRC(Cyclic Redundancy Check).

• 重点研究了ADSL系统的信道差错控制编码技术,包括Viterbi译码、Reed_Solomn译码和CRC校验(循环冗余校验)。