The LDPC codes different number of iterations contrast. Long code 512, code rate 1/2, the number of iterations were 0,5,10,50,100.

不同迭代次数（可以用）\bpsk.m
......................\bp_decoder1.m
......................\bp_decoder10.m
......................\bp_decoder100.m
......................\bp_decoder5.m
......................\bp_decoder50.m
......................\extract_mesg.m
......................\genH.m
......................\H2P.m
......................\ldpc_encode.m
......................\main.m
......................\mul_GF2.m
......................\reorder_bits.m
......................\可以用.fig
不同迭代次数（可以用）

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