Restore ordering of input symbols using algebraically derived permutation
Block sublibrary of Interleaving
The Algebraic Deinterleaver block restores the original ordering of a sequence that was interleaved using the Algebraic Interleaver block. In typical usage, the parameters in the two blocks have the same values.
The Number of elements parameter, N, indicates how many numbers are in the input vector. This block accepts a column vector input signal.
The block accepts the following data types:
and fixed-point. The output signal inherits its data type from the
The Type parameter indicates the algebraic
method that the block uses to generate the appropriate permutation
table. Choices are
Each of these methods has parameters and restrictions that are specific
to it; these are described on the reference page for the Algebraic Interleaver block.
The type of permutation table that the block uses for deinterleaving.
The number of elements, N, in the input vector.
The factor the block uses to compute the corresponding interleaver's
cycle vector. This field appears only when you set Type to
The amount by which the block shifts indices when creating the
corresponding interleaver's permutation table. This field appears
only when you set Type to
An element of order N in the finite field
GF(N+1). This field appears only if Type is set
 Heegard, Chris and Stephen B. Wicker. Turbo Coding. Boston: Kluwer Academic Publishers, 1999.
 Takeshita, O. Y. and D. J. Costello, Jr. "New Classes Of Algebraic Interleavers for Turbo-Codes." Proc. 1998 IEEE International Symposium on Information Theory, Boston, Aug. 16-21, 1998. 419.