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56 Xilinx Development System
Xilinx System Generator v2.1 Reference Guide
Figure 3-34: Forney convolutional interleaver with a constant difference
between consecutive branches
When the block is in deinterleaver mode, the input data sampled on the DIN port is
multiplexed into and out of B shift registers onto the DOUT port using two
(synchronized) commutator arms. Branch 0 will have a shift register of length (B-1)*L.
Branch (B-1) shall have a shift register length of zero.
Figure 3-35: Forney convolutional deinterleaver with a constant difference
between consecutive branches