309 lines
7.4 KiB
Fortran
309 lines
7.4 KiB
Fortran
|
subroutine encode300(message,codeword)
|
||
|
|
! Encode an 60-bit message and return a 300-bit codeword.
|
||
|
|
! The generator matrix has dimensions (240,60).
|
||
|
|
! The code is a (300,60) irregular ldpc code with column weights:
|
||
|
|
! 52% column weight 2
|
||
|
|
! 27% column weight 3
|
||
|
|
! 21% column weight 7
|
||
|
|
! The code was generated using the PEG algorithm.
|
||
|
|
! After creating the codeword, the columns are re-ordered according to
|
||
|
|
! "colorder" to make the codeword compatible with the parity-check matrix
|
||
|
|
!
|
||
|
|
character*15 g(240)
|
||
|
|
integer*1 codeword(300)
|
||
|
|
integer colorder(300)
|
||
|
|
integer*1 gen(240,60)
|
||
|
|
integer*1 itmp(300)
|
||
|
|
integer*1 message(60)
|
||
|
|
integer*1 pchecks(240)
|
||
|
|
logical first
|
||
|
|
data first/.true./
|
||
|
|
data g/ &
|
||
|
|
"316fd3bb18bcefd", &
|
||
|
|
"a9c1c984f91244e", &
|
||
|
|
"9e04bd3d5d78d89", &
|
||
|
|
"f81617089621bd4", &
|
||
|
|
"12997ce2f44dbf4", &
|
||
|
|
"3ebddaf9b0fa1fc", &
|
||
|
|
"d0c114b0b0ef162", &
|
||
|
|
"f8c4f115f98bd92", &
|
||
|
|
"d0a79c0c5b8ca19", &
|
||
|
|
"477f6712f357b3b", &
|
||
|
|
"fa28b2444a7e66b", &
|
||
|
|
"bedcd4df8d95c64", &
|
||
|
|
"da30de73e57022c", &
|
||
|
|
"bc099bbb90fe09e", &
|
||
|
|
"cffc1e47e5708e8", &
|
||
|
|
"713d808563ca9a3", &
|
||
|
|
"70fcf1741d5d5d7", &
|
||
|
|
"32e80bc15112008", &
|
||
|
|
"804cef4df9b18ec", &
|
||
|
|
"3736881819d1033", &
|
||
|
|
"f4e37db7f9c5efe", &
|
||
|
|
"9e84b93d4d78d09", &
|
||
|
|
"2250c3518ec830a", &
|
||
|
|
"55a529a92e18021", &
|
||
|
|
"1cb80b14c9f6eae", &
|
||
|
|
"80c504b031ef926", &
|
||
|
|
"ece6636d0ac9c6d", &
|
||
|
|
"5d50a1690782cd0", &
|
||
|
|
"3d54a1fb30937a2", &
|
||
|
|
"ba8fe8006318041", &
|
||
|
|
"02917ce2fc45bf4", &
|
||
|
|
"abc1d984f95a44e", &
|
||
|
|
"fc05b4c4ab2d850", &
|
||
|
|
"467f7718f357b3b", &
|
||
|
|
"472cc094546c6b2", &
|
||
|
|
"fcdd94cf8c9cc64", &
|
||
|
|
"4dbc1647e970cc8", &
|
||
|
|
"6caa465c442aed1", &
|
||
|
|
"aead5af8b0da1be", &
|
||
|
|
"d8e1fa45a2e8431", &
|
||
|
|
"9d4dc4cc63abb7f", &
|
||
|
|
"9b2df6b48264637", &
|
||
|
|
"7335808563ca3a3", &
|
||
|
|
"36bf8d5cd93e6cc", &
|
||
|
|
"004ccf4db9b08ec", &
|
||
|
|
"90a71c8c598ca19", &
|
||
|
|
"f8c5d115f90bc92", &
|
||
|
|
"b95546c4e3f7934", &
|
||
|
|
"7d50a1690786cd0", &
|
||
|
|
"c90939921a0d7c6", &
|
||
|
|
"d0c504b030ef126", &
|
||
|
|
"ce3e6f9396fc542", &
|
||
|
|
"a0072a59f3707f5", &
|
||
|
|
"532d0a8fe3da1ea", &
|
||
|
|
"68b9e5cd7d142db", &
|
||
|
|
"fedc94df8c9dc64", &
|
||
|
|
"6da2465c448aed0", &
|
||
|
|
"3574aa19cb273c0", &
|
||
|
|
"1e54768c6bc6843", &
|
||
|
|
"691f65654498186", &
|
||
|
|
"fe2c92444a6ef6b", &
|
||
|
|
"9caad933e038cc4", &
|
||
|
|
"ad4e6f4defb28ec", &
|
||
|
|
"4f3d80947c6d2b2", &
|
||
|
|
"1caad933e0b8cc4", &
|
||
|
|
"b14fd3bf18bcafd", &
|
||
|
|
"ad091bbbb0f809e", &
|
||
|
|
"90b71c8c598da19", &
|
||
|
|
"f8c4d115f90bd92", &
|
||
|
|
"9d4dcccc63afb7f", &
|
||
|
|
"fa2c92444a6e76b", &
|
||
|
|
"1e14768c6bc6c43", &
|
||
|
|
"d1baf5aacb86087", &
|
||
|
|
"bdf762b92ee51c7", &
|
||
|
|
"caacec06ad8a90c", &
|
||
|
|
"804ccf4df9b08ec", &
|
||
|
|
"69e969f9da5cbd8", &
|
||
|
|
"814ccf4df9b086c", &
|
||
|
|
"cebe4f9796f4542", &
|
||
|
|
"491f65654499186", &
|
||
|
|
"8fbf5b9796f6d2a", &
|
||
|
|
"ce3e4f9396f4542", &
|
||
|
|
"47558560e7debc3", &
|
||
|
|
"94aadd33e038cc4", &
|
||
|
|
"a94eef4debb286e", &
|
||
|
|
"d8e5d115f91bcd2", &
|
||
|
|
"532d488fe3da0ab", &
|
||
|
|
"664e7bc4e23a80c", &
|
||
|
|
"94a2dd33a038cd4", &
|
||
|
|
"d8c5d115f91bc92", &
|
||
|
|
"0fef071eee60bd5", &
|
||
|
|
"9a89a09163c2b97", &
|
||
|
|
"0eaf071e6c60bd5", &
|
||
|
|
"bc0d1bbbb0fe0be", &
|
||
|
|
"f9babd3d12d0f31", &
|
||
|
|
"69a969f9da5c9d8", &
|
||
|
|
"6e4e7bc4e23a82c", &
|
||
|
|
"b0042659f3227f5", &
|
||
|
|
"2d51418f0f28347", &
|
||
|
|
"be0d5bbbb0da0be", &
|
||
|
|
"225003508ec8302", &
|
||
|
|
"8fbf4b9796f4d2a", &
|
||
|
|
"bead5af9b0da1be", &
|
||
|
|
"6ca2465c440aed1", &
|
||
|
|
"4fbc1e47ed708c8", &
|
||
|
|
"bd091bbbb0fc09e", &
|
||
|
|
"b0062259f3307f5", &
|
||
|
|
"a8072a59f3727f5", &
|
||
|
|
"a0062259f3707f5", &
|
||
|
|
"3c380b14c974eae", &
|
||
|
|
"30042659f3226f5", &
|
||
|
|
"48b9e4cd7d142db", &
|
||
|
|
"728bcd4b38308fb", &
|
||
|
|
"c0c504b031ef126", &
|
||
|
|
"314fd3bb18bcafd", &
|
||
|
|
"1c29148305faec1", &
|
||
|
|
"44c92a9c28ada63", &
|
||
|
|
"88e99b370aae32b", &
|
||
|
|
"695081690386ad8", &
|
||
|
|
"572d0a8de3da1ea", &
|
||
|
|
"467f6610f357b2b", &
|
||
|
|
"733d008563da1a3", &
|
||
|
|
"d1baf4aacb84087", &
|
||
|
|
"4315551d71c8ff0", &
|
||
|
|
"48bde4cd7d140db", &
|
||
|
|
"3ebd58f9b0da9fc", &
|
||
|
|
"51baf4aacb84083", &
|
||
|
|
"814e4f4de9b082c", &
|
||
|
|
"814ecf4de9b086c", &
|
||
|
|
"be0d1bbbb0fa0be", &
|
||
|
|
"4f7580947c792b3", &
|
||
|
|
"cdf2dce48c39c3b", &
|
||
|
|
"d8c5c115f91bc12", &
|
||
|
|
"a94e6f4debb28ee", &
|
||
|
|
"be2d5afbb0da1be", &
|
||
|
|
"cdd6dce48439c2b", &
|
||
|
|
"bebd5af9b0da1fe", &
|
||
|
|
"fa2892444a6e66b", &
|
||
|
|
"51bbf4aacb8c083", &
|
||
|
|
"baa73d81eebcd83", &
|
||
|
|
"79a2ce47f138cc9", &
|
||
|
|
"cc28cf198e6dbd4", &
|
||
|
|
"fcde94dfcc9cc64", &
|
||
|
|
"1016fcf59286717", &
|
||
|
|
"12917ce2fc4dbf4", &
|
||
|
|
"4fbc1647e9708c8", &
|
||
|
|
"3e382b1cc974fae", &
|
||
|
|
"d5bafdaad386087", &
|
||
|
|
"0fef473eee60bd5", &
|
||
|
|
"c0e504b031ee126", &
|
||
|
|
"8bbf5b9797f6d2a", &
|
||
|
|
"0eef071e6e60bd5", &
|
||
|
|
"1806fcf59386517", &
|
||
|
|
"fcdc94df8c9cc64", &
|
||
|
|
"141eca2bfa25656", &
|
||
|
|
"5fbc1767e9708e8", &
|
||
|
|
"5aa4c7803a6bdf1", &
|
||
|
|
"b14bd3b718bcafd", &
|
||
|
|
"3ebd5af9b0da1fc", &
|
||
|
|
"d0a7148c5b8ca09", &
|
||
|
|
"a94ecf4debb086e", &
|
||
|
|
"733d808563ca1a3", &
|
||
|
|
"fd9abd1d92d0f31", &
|
||
|
|
"bc091bbbb0fe09e", &
|
||
|
|
"d0c514b0b0ef122", &
|
||
|
|
"4f7d80947c7d2b3", &
|
||
|
|
"8b3f5b97b7f6d2a", &
|
||
|
|
"4fbc1767e9708c8", &
|
||
|
|
"cebf4f9796f4502", &
|
||
|
|
"9c76c880a864e67", &
|
||
|
|
"abc1c984f95244e", &
|
||
|
|
"795081690786ad8", &
|
||
|
|
"467f6710f357b3b", &
|
||
|
|
"1c380b14c9f4eae", &
|
||
|
|
"d5baf5aac386087", &
|
||
|
|
"bedc94df8c95c64", &
|
||
|
|
"553d0a8de2da1fa", &
|
||
|
|
"0315551d71d8ff0", &
|
||
|
|
"1c1eca2ffa25656", &
|
||
|
|
"d4bafdaad3c6087", &
|
||
|
|
"be2d5bfbb0da0be", &
|
||
|
|
"b0062659f3207f5", &
|
||
|
|
"5ffc1765e9708e8", &
|
||
|
|
"8d62e8bcd303e33", &
|
||
|
|
"cc08cf198e69bd4", &
|
||
|
|
"573d0a8de3da1fa", &
|
||
|
|
"cd56dce48639c2b", &
|
||
|
|
"472dc094546c2b2", &
|
||
|
|
"7950a16907868d8", &
|
||
|
|
"7283cf4b38308fb", &
|
||
|
|
"894ecf4de9b086e", &
|
||
|
|
"0f7580b47c792b3", &
|
||
|
|
"cfbf4b9796f4d0a", &
|
||
|
|
"3e380b14c974fae", &
|
||
|
|
"732d0085e3da1a3", &
|
||
|
|
"1816fcf59386717", &
|
||
|
|
"532d088fe3da1ab", &
|
||
|
|
"1c300b94c9fcaae", &
|
||
|
|
"d0a71c8c5b8ca19", &
|
||
|
|
"9e84bd3d5d78d09", &
|
||
|
|
"225083508ec830a", &
|
||
|
|
"f99abd1d12d0f31", &
|
||
|
|
"35f4aa19cb673c0", &
|
||
|
|
"cdd2dce48c39c2b", &
|
||
|
|
"0f7780b47c792bf", &
|
||
|
|
"0e33a5f114f5730", &
|
||
|
|
"bc05b4c4ab0d850", &
|
||
|
|
"1c300b14c9f4aae", &
|
||
|
|
"cfbc1e47ed708e8", &
|
||
|
|
"0f7180b47c392b3", &
|
||
|
|
"d8c7c115f91be12", &
|
||
|
|
"c09148adfa94e97", &
|
||
|
|
"9c66c880a844e67", &
|
||
|
|
"2226c13b73519f8", &
|
||
|
|
"cebf4b9796f4d02", &
|
||
|
|
"c0e706b031ee126", &
|
||
|
|
"6a6629715e53ce3", &
|
||
|
|
"73f9aa824e7d0b8", &
|
||
|
|
"473d80947c6c2b2", &
|
||
|
|
"1df140e0ddb5632", &
|
||
|
|
"473dc0945c6c2b2", &
|
||
|
|
"81b4d95f671971d", &
|
||
|
|
"663945ca758e2b6", &
|
||
|
|
"02ec3d98a2306fd", &
|
||
|
|
"5dadb0fa1275690", &
|
||
|
|
"4bb8aaa854948d0", &
|
||
|
|
"8359ba40886971c", &
|
||
|
|
"49cc3d2a2be2ee0", &
|
||
|
|
"bfdf13af137f318", &
|
||
|
|
"a1de773a2b1ff04", &
|
||
|
|
"8ff3945a2f465c7", &
|
||
|
|
"532d0087e3da1a3", &
|
||
|
|
"f3eaf7fa454d385", &
|
||
|
|
"a606aa5aeba07d9", &
|
||
|
|
"67f0627b0af8a53", &
|
||
|
|
"56698bed69d1c2c", &
|
||
|
|
"d5f420011fbf924", &
|
||
|
|
"2a8f86c810e2c62", &
|
||
|
|
"43cc1cf1208c206", &
|
||
|
|
"ee784c4900258de"/
|
||
|
|
|
||
|
|
data colorder/ &
|
||
|
|
0,1,2,3,4,5,6,7,8,9,10,11,123,12,13,14,15,16,17,18, &
|
||
|
|
19,20,21,22,23,24,25,138,26,145,27,28,29,30,31,32,33,34,35,36, &
|
||
|
|
37,154,38,39,40,41,42,43,44,144,46,47,48,49,50,51,52,53,143,54, &
|
||
|
|
125,56,57,58,124,59,120,140,157,160,55,60,61,62,156,162,141,64,65,153, &
|
||
|
|
181,183,66,170,67,68,69,130,70,164,71,72,73,74,75,63,76,77,135,78, &
|
||
|
|
79,80,176,169,82,83,84,167,180,85,136,158,129,166,175,142,134,146,121,165, &
|
||
|
|
88,89,192,90,45,91,92,93,182,189,94,95,96,173,81,97,98,178,122,126, &
|
||
|
|
132,99,100,152,186,193,101,102,151,103,104,172,159,168,150,190,147,148,201,107, &
|
||
|
|
205,177,108,198,197,174,127,109,185,110,202,87,199,171,179,187,139,137,106,131, &
|
||
|
|
206,194,112,149,155,113,128,184,196,86,114,203,212,195,208,105,188,161,163,191, &
|
||
|
|
200,209,214,204,115,218,133,111,207,117,213,216,211,217,116,215,219,220,210,221, &
|
||
|
|
118,222,223,225,224,228,226,229,231,227,233,119,234,235,232,230,237,239,236,238, &
|
||
|
|
240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259, &
|
||
|
|
260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279, &
|
||
|
|
280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299/
|
||
|
|
|
||
|
|
save first,gen
|
||
|
|
|
||
|
|
if( first ) then ! fill the generator matrix
|
||
|
|
gen=0
|
||
|
|
do i=1,240
|
||
|
|
do j=1,15
|
||
|
|
read(g(i)(j:j),"(Z1)") istr
|
||
|
|
do jj=1, 4
|
||
|
|
icol=(j-1)*4+jj
|
||
|
|
if( btest(istr,4-jj) ) gen(i,icol)=1
|
||
|
|
enddo
|
||
|
|
enddo
|
||
|
|
enddo
|
||
|
|
first=.false.
|
||
|
|
endif
|
||
|
|
|
||
|
|
do i=1, 240
|
||
|
|
nsum=0
|
||
|
|
do j=1, 60
|
||
|
|
nsum=nsum+message(j)*gen(i,j)
|
||
|
|
enddo
|
||
|
|
pchecks(i)=mod(nsum,2)
|
||
|
|
enddo
|
||
|
|
itmp(1:240)=pchecks
|
||
|
|
itmp(241:300)=message(1:60)
|
||
|
|
codeword(colorder+1)=itmp(1:300)
|
||
|
|
|
||
|
|
return
|
||
|
|
end subroutine encode300
|