Turbo Intel® FPGA IP User Guide

ID 683734
Date 9/30/2022

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4.2. Turbo Decoder

The Turbo decoder consists of two single soft-in soft-out (SISO) decoders, which work iteratively. The output of the first (upper decoder) feeds into the second to form a Turbo decoding iteration. Interleaver and deinterleaver blocks re-order data in this process.
Figure 8. Turbo Decoder Block Diagram

The Turbo decoder supports the MaxLogMAP decoding algorithm. This algorithm is a simplified version of LogMAP that uses less logic resource and offers slightly reduced BER performance relative to LogMAP.