10/29/03
6
What to do about
h
= 0?
¥
There are several options:
§
s
(0) = +1
§
s
(0) = Ð1
§
s
(0) = Ð1 or +1 with equal probability
§
h
i
= 0
Þ
no state change (
s
i
¢
=
s
i
)
¥
Not much difference, but be consistent
¥
Last option is slightly preferable, since
symmetric
Last option leads to symmetric flow diagram
(Haykin 291, fig. 8.1)