Interleaver Deinterleaver - Xilinx System Generator V2.1 Reference Manual

Block Parameters Dialog Box
The Xilinx depuncture block can be configured using its Block Parameters dialog box.
Figure 3-33: Depuncture block parameters dialog box
Parameters specific to the Xilinx Puncture block are:
Other parameters used by this block are described in the Common Parameters section
of the previous chapter.
The Depuncture block does not use a Xilinx LogiCORE.

Interleaver Deinterleaver

as illustrated in the figure below. B is the number of branches as entered in the block's
parameters dialog. Branch 0 shall have a shift register of zero length. Branch 1 shall
have a shift register of length L . Branch 2 shall have a shift register of length 2L .
Branch ( B-1 ) shall have a shift register of length (B-1)L . L is the branch length
constant entered as an array with a length of one.
Communication
Depuncture Code: specifies the depuncture pattern for inserting the string to
the input.
Insert Symbol: specifies the binary word to be inserted in the depuncture
code.
The Xilinx Interleaver/Deinterleaver block implements an
interleaver or a deinterleaver. An interleaver is a device that
rearranges the ordering of a sequence of symbols in a one-to-one
deterministic manner. Associated with any interleaver is a
deinterleaver, a device that restores the reordered sequence.
When the block is in interleaver mode, the input data sampled on
the din port shall be multiplexed into and out of B shift registers
onto the dout port using two (synchronized) commutator arms,
Xilinx Blocks
55