On saving decoder states for some trellis codes and partial response channels

E. Zehavi, J.K. Wolf
1988 IEEE Transactions on Communications  
A bstract-It is shown that under certain conditions, when convolutional codes with precoding are used in conjunction with a partial response channel, the number of decoder states in a maximum likelihood decoder matched to both the code and channel is 1/2 of that predicted by Wolf and Ungerboeck Ill.
doi:10.1109/26.2754 fatcat:tpcw5ipprzaohoil3hij4fgdpq