how to set the trellis structure according to the figure?

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Xiaotian Yu 2023-9-11

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https://ww2.mathworks.cn/matlabcentral/answers/2019356-how-to-set-the-trellis-structure-according-to-the-figure

评论： Xiaotian Yu 2023-9-19

i'm stuck by the implementation of turbo encoder. As this figure 3.11 showed,it's the structure of a Turbo encoder. it consists of two RSC encoders and Turbo interleaver. The structure of the RSC encoder is shown in figure 3-12.

I checked the Matlab help for how to establish an encoder using poly2trellis, the website is: https://de.mathworks.com/help/comm/ref/poly2trellis.html

But it showed that, this kind of figure 3-12 can't be established with poly2trellis. I have no idea how to implement it.

Xiaotian Yu

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Answer 1

Brahmadev 2023-9-18

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Hi Xiaotian,

I understand that you would like to build a non-recursive, non-systematic convolutional encoder. You can do so in Simulink using a Model as demonstrated below.