Channel equalization using watermark as a training sequence

[摘要] In this paper blind equalization algorithms based on digitalwatermarking are presented. Training sequence is sent along with the data inthe form of watermark. Robust CDMA based watermarking algorithm is used towatermark the data. Watermark, which is spread over the data, does notconsume extra bandwidth. So with the help of extracted watermark channel canbe equalized just by using simple mean square algorithm. Two algorithms forequalization are proposed in this paper. In algorithm I the receiver does notrequire to know training sequence in advance. Using algorithm II, the senderdoes not require to send training sequence either, and data can still beequalized using simple LMS algorithm at low computational complexity.

[学科分类] 电子、光学、磁材料