mohatta2015.pdf

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Figure 6.3
MLSD tree diagram.
To get a tree structure, we need to first triangularize the channel. Using the
same approach as for ZF DFE in Chapter 3, we can translate the system model to
the form
x\ — c\\S\ + ui (6.19)
X2 = c 2 isi +C22S2 +«2, (6.20)
where «i and «2 are uncorrelated. We consider x\ first and form two branch metrics:
where
P{.9i = +\) = B{x uqi = +l) (6.21)
P(