A Programmable Max-Log-MAP Turbo Decoder Implementation

<table>Turbo encoding and decoding. The decoding is an
iterative process, which runs SISO component decoder several times.
Interleaving and deinterleaving are denoted with <svg height="7.0124998" id="M5" style="vertical-align:-0.16302pt" version="1.1" viewbox="0 0 9.625 7.0124998" width="9.625" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,7.0125)">
<g transform="translate(72,-66.39)">
<text transform="matrix(1,0,0,-1,-71.95,66.6)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝜋</tspan>
</text>
</g>
</g>
</svg> and <svg height="13.975" id="M6" style="vertical-align:-0.16302pt" version="1.1" viewbox="0 0 23.2125 13.975" width="23.2125" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,13.975)">
<g transform="translate(72,-60.82)">
<text transform="matrix(1,0,0,-1,-71.95,61.03)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝜋</tspan>
</text>
<text transform="matrix(1,0,0,-1,-64.35,66.03)">
<tspan style="font-size: 8.75px; " x="0" y="0">−</tspan>
<tspan style="font-size: 8.75px; " x="5.99512" y="0">1</tspan>
</text>
</g>
</g>
</svg>,
respectively.</table>

VLSI Design

A Programmable Max-Log-MAP Turbo Decoder Implementation

Figure 1