Is this Matlab example wrong? DVBS2 encoding/decoding

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Jorge Cadena
Jorge Cadena 2021-9-28
I am having trouble replicating MATLAB's BCH encoding in this example:
openExample('comm/DVBS2WithLDPCExample','supportingFile','configureDVBS2Demo.m')
I am trying to replace the function "bchEncOut = encbch(bbFrameTx);" by my own script.
I was successful in encoding and decoding the bits with my own BCH, but the remainder (parity) bits that I obtain after encoding DO NOT match MATLAB's bits. I cannot figure out where the differences are, as I cannot peek into MATLAB's BCH function. I am even using the same generation pattern they use.
The BCH encoding details can be found in ETSI EN 302 307-1 --- DVB-S2 Part 1, pg 23-24.

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