User`s guide

Direct-Form II Transpose Filter
5-135
Initial Conditions
In its default form, the filter initializes the internal filter states to zero, which
is equivalent to assuming past inputs and outputs are zero. The block also
accepts optional nonzero initial conditions for the filter delays. Note that the
number of filter states (delay elements) per input channel is
max(m,n)-1
The Initial conditions parameter may take one of four forms:
•Empty matrix
The empty matrix,
[], causes a zero (0) initial condition to be applied to all
delay elements in each filter channel.
•Scalar
The scalar value is copied to all delay elements in each filter channel. Note
that a value of zero is equivalent to setting the
Initial conditions parameter
to the empty matrix,
[].
•Vector
The vector has a length equal to the number of delay elements in each filter
channel,
max(m,n)-1, and specifies a unique initial condition for each delay
element in the filter channel. This vector of initial conditions is applied to
each filter channel.
•Matrix
The matrix specifies a unique initial condition for each delay element, and
can specify different initial conditions for each filter channel. The matrix
must have the same number of rows as the number of delay elements in the
filter,
max(m,n)-1, and must have one column per filter channel.