User`s guide

IFFT
5-234
Valid Block Inputs
•Must be complex-valued
•M must be a power of two
•In linear or bit-reversed
order
Dimension Along
Which Block
Computes IDFT
Corresponding Block Output
Characteristics
Output port rate = input port rate
Frame-based M-by-N matrix Column The following output characteristics apply
to all valid block inputs:
•Frame-based
•Complex-valued unless you set the
Input
is conjugate symmetric
parameter
when your input is conjugate-symmetric,
in which case the output is real-valued
•Same dimension as input (for 1-D inputs,
output is a length-M column)
•Each column (each row for sample-based
row inputs) contains the M-point IDFT of
the corresponding input channel in linear
order. If the parameter
Skip normaliza-
tion by transform length, N
is set, rath-
er than computing the IDFT, the block
computes a scaled version of the IDFT
given by Equation 5-4.
Sample-based M-by-N
matrix,
Column
Sample-based 1-by-M row
vector
Row
1-D length-M vector Vector
M 1≠