关于LDPC编/译码的方针平台。能随机产生信源和模拟高斯信道。

								# CODE 1								make-pchk ex-dep.pchk 4 6 0:0 0:5 3:1 3:2				print-pchk -d ex-dep.pchk								Parity check matrix in ex-dep.pchk (dense format):								 1 0 0 0 0 1				 0 0 0 0 0 0				 0 0 0 0 0 0				 0 1 1 0 0 0								echo 00011011 >ex-dep.src								# SPARSE REPRESENTATION								make-gen ex-dep.pchk ex-dep.gen sparse				Note: Parity check matrix has 2 redundant checks				Number of 1s per check in L is 0.8, U is 0.5, B is 0.2, total is 1.5				print-gen -d ex-dep.gen								Generator matrix in ex-dep.gen (sparse representation):								Column order (message bits at end):								   5   2   1   3   4   0								Row order:								   0   3   2   1								L:								 1 0 0 0				 0 0 0 0				 0 0 0 0				 0 1 0 0								U:								 0 0 0 0 0 1				 0 1 1 0 0 0				 0 0 0 0 0 0				 0 0 0 0 0 0								encode ex-dep.pchk ex-dep.gen ex-dep.src ex-dep.enc; cat ex-dep.enc				Encoded 4 blocks, source block size 2, encoded block size 6				000000				100001				000010				100011				verify ex-dep.pchk ex-dep.enc ex-dep.gen ex-dep.src				Block counts: tot 4, with chk errs 0, with src errs 0, both 0				Bit error rate (on message bits only): 0.000e+00								# DENSE REPRESENTATION								make-gen ex-dep.pchk ex-dep.gen dense				Note: Parity check matrix has 2 redundant checks				Number of 1s per check in Inv(A) X B is 0.2				print-gen -d ex-dep.gen								Generator matrix in ex-dep.gen (dense representation):								Column order (message bits at end):								   0   1   2   3   4   5								Inv(A) X B:								 0 1				 0 0				 0 0				 0 0								encode ex-dep.pchk ex-dep.gen ex-dep.src ex-dep.enc; cat ex-dep.enc				Encoded 4 blocks, source block size 2, encoded block size 6				000000				100001				000010				100011				verify ex-dep.pchk ex-dep.enc ex-dep.gen ex-dep.src				Block counts: tot 4, with chk errs 0, with src errs 0, both 0				Bit error rate (on message bits only): 0.000e+00								# MIXED REPRESENTATION								make-gen ex-dep.pchk ex-dep.gen mixed				Note: Parity check matrix has 2 redundant checks				Number of 1s per check in Inv(A) is 0.5, in B is 0.2, total is 0.8				print-gen -d ex-dep.gen								Generator matrix in ex-dep.gen (mixed representation):								Column order (message bits at end):								   0   1   2   3   4   5								Inv(A):								 1 0 0 0				 0 0 0 1				 0 0 0 0				 0 0 0 0								encode ex-dep.pchk ex-dep.gen ex-dep.src ex-dep.enc; cat ex-dep.enc				Encoded 4 blocks, source block size 2, encoded block size 6				000000				100001				000010				100011				verify ex-dep.pchk ex-dep.enc ex-dep.gen ex-dep.src				Block counts: tot 4, with chk errs 0, with src errs 0, both 0				Bit error rate (on message bits only): 0.000e+00								# CODE 2								make-pchk ex-dep.pchk 4 5 0:0 0:1 1:1 1:2 2:0 2:2 3:3 3:4				print-pchk -d ex-dep.pchk								Parity check matrix in ex-dep.pchk (dense format):								 1 1 0 0 0				 0 1 1 0 0				 1 0 1 0 0				 0 0 0 1 1								echo 01 >ex-dep.src								# SPARSE REPRESENTATION								make-gen ex-dep.pchk ex-dep.gen sparse				Note: Parity check matrix has 1 redundant checks				Number of 1s per check in L is 1.0, U is 1.2, B is 0.5, total is 2.8				print-gen -d ex-dep.gen								Generator matrix in ex-dep.gen (sparse representation):								Column order (message bits at end):								   4   1   2   3   0								Row order:								   3   0   1   2								L:								 0 1 0 0				 0 1 1 0				 0 0 1 0				 1 0 0 0								U:								 0 0 0 1 1				 0 1 0 0 0				 0 0 1 0 0				 0 0 0 0 0								encode ex-dep.pchk ex-dep.gen ex-dep.src ex-dep.enc; cat ex-dep.enc				Encoded 2 blocks, source block size 1, encoded block size 5				00000				11100				verify ex-dep.pchk ex-dep.enc ex-dep.gen ex-dep.src				Block counts: tot 2, with chk errs 0, with src errs 0, both 0				Bit error rate (on message bits only): 0.000e+00								# DENSE REPRESENTATION								make-gen ex-dep.pchk ex-dep.gen dense				Note: Parity check matrix has 1 redundant checks				Number of 1s per check in Inv(A) X B is 0.2				print-gen -d ex-dep.gen								Generator matrix in ex-dep.gen (dense representation):								Column order (message bits at end):								   0   1   3   2   4								Inv(A) X B:								 0				 0				 1				 0								encode ex-dep.pchk ex-dep.gen ex-dep.src ex-dep.enc; cat ex-dep.enc				Encoded 2 blocks, source block size 1, encoded block size 5				00000				00011				verify ex-dep.pchk ex-dep.enc ex-dep.gen ex-dep.src				Block counts: tot 2, with chk errs 0, with src errs 0, both 0				Bit error rate (on message bits only): 0.000e+00								# MIXED REPRESENTATION								make-gen ex-dep.pchk ex-dep.gen mixed				Note: Parity check matrix has 1 redundant checks				Number of 1s per check in Inv(A) is 1.0, in B is 0.2, total is 1.2				print-gen -d ex-dep.gen								Generator matrix in ex-dep.gen (mixed representation):								Column order (message bits at end):								   0   1   3   2   4								Inv(A):								 1 1 0 0				 0 1 0 0				 0 0 0 1				 0 0 0 0								encode ex-dep.pchk ex-dep.gen ex-dep.src ex-dep.enc; cat ex-dep.enc				Encoded 2 blocks, source block size 1, encoded block size 5				00000				00011				verify ex-dep.pchk ex-dep.enc ex-dep.gen ex-dep.src				Block counts: tot 2, with chk errs 0, with src errs 0, both 0				Bit error rate (on message bits only): 0.000e+00