LDPC Decoder (CCSDS) ccsds_ldpc_decoder CCSDS/Channelcoding import ccsds ccsds.ldpc_decoder($par_file, $systype.fcn, $puncttype.fcn, $num_punct, tuple($punct_pos)) Paritycheck matrix par_file file_open Systematic systype ccsds.LDPC_SYS_FRONT enum None sys_none fcn:ccsds.LDPC_SYS_NONE Front sys_front fcn:ccsds.LDPC_SYS_FRONT Back sys_back fcn:ccsds.LDPC_SYS_BACK Puncturing position puncttype ccsds.LDPC_PUNCT_NONE enum None punct_none fcn:ccsds.LDPC_PUNCT_NONE Front punct_front fcn:ccsds.LDPC_PUNCT_FRONT Back punct_back fcn:ccsds.LDPC_PUNCT_BACK Custom punct_custom fcn:ccsds.LDPC_PUNCT_CUSTOM Number of punctures num_punct 0 int Custom puncturing positions punct_pos [] int_vector $num_punct >= 0 in message out message