Belief Propagation as Dynamical System -- Matlab code

Some example Matlab code to generate parity-check matrices, together with supporting code to implement the dynamical system described in the article "Belief Propagation as a Dynamical System: The Linear Case and Open Problems."

Belief Propagation as Dynamical System -- Documentation

A technical report to document the above Matlab code. It contains a step-through example to generate a parity-check matrix, a generator matrix out of that parity-check matrix, a random message, to encode this message to a codeword, transmit this after BPSK modulation via an AWGN channel, computation of the a-posteriori probability ratios on the receiver side and finally to apply the Belief Propagation algorithm to these a-priori LLRs to get (approximate) a-posteriori LLRs.