Gs. Liu et Ch. Wei, QUADRILEVEL PERIODIC SEQUENCES FOR FAST START-UP EQUALIZATION AND CHANNEL ESTIMATION, IEEE transactions on communications, 44(2), 1996, pp. 143-144
A class of four-level periodic sequences derived from the binary m-seq
uences are presented. These sequences can be used as the training sequ
ences in adaptive channel estimation and equalization with fast start-
up for multilevel PAM or QAM transmission. The sequence generator can
be implemented by simple hardware.