diff --git a/lib/fsk4hf/ldpc_174_101_generator.f90 b/lib/fsk4hf/ldpc_174_101_generator.f90
new file mode 100644
index 000000000..26b300d7c
--- /dev/null
+++ b/lib/fsk4hf/ldpc_174_101_generator.f90
@@ -0,0 +1,76 @@
+character *26 g(73)
+
+data g/   &
+  "63e951344af12c4cc41106e760", &
+  "68d44d92ecd93ad6d4692266c8", &
+  "4580fb1fac614cbfd928ede720", &
+  "14eeda1b8a01f66880f5012ad8", &
+  "35a9cfb6458a89bf8aafeaf488", &
+  "20c8bc97810aea0bea6224ddb8", &
+  "f577e866d9a5ed407f37bf4010", &
+  "100d26dff465508c671a3b2710", &
+  "4e860571d270084b99b18e74a0", &
+  "495bbc1ba799ac5f5c159ebeb8", &
+  "c71b622d5e7e351b46cf9f29a8", &
+  "2e01d802b77181d4789285fdb8", &
+  "41ee2ab37388eaee0ec6d54860", &
+  "839084a886a9e1f3c5f56453b0", &
+  "bbaef43ff6506531465a4a2690", &
+  "627436a8e4ff531d190f179a68", &
+  "d48abf3769173ad49de8bf9d98", &
+  "1a588539d6b05682445316b6e0", &
+  "59dfa468e4da46b03c5fe69b48", &
+  "0c94c6716f592a165d9ad056a8", &
+  "4cae5d652767e32d08b75bf370", &
+  "9d7bff3c3fea24c15d9a78e550", &
+  "400576f3f695101962ccbd7818", &
+  "8731ecdaa728862d0f29f334a8", &
+  "3b588539d6b0d682547316b6e0", &
+  "958ee990eb7b62502f49733388", &
+  "4c84c6716f582a165dbad0d6a8", &
+  "9294bdce4590c752416f516238", &
+  "72a2a0f864533375373ff521d8", &
+  "552a32c530cb00206e8ce56d90", &
+  "fbc29b77052ba34d9993873c98", &
+  "eeb3767ac69e86f08d793a44a0", &
+  "20f4128d200bdae9a24e79efd0", &
+  "26aaf29464a373e092e963fed0", &
+  "33cd65456ae8efe40bce1b3378", &
+  "900d66fff465708c671a3b2730", &
+  "91aa5e8f40af51c256da031b00", &
+  "ca41c5a3d010dfe60d87a3ab68", &
+  "9d68f4c75fceab703c9a74ea58", &
+  "2d2f3945b24e17547f27f78400", &
+  "07d78fdbc0f3c361297561f070", &
+  "ebbcb3f268a60852e7582376f0", &
+  "c263d7e939dbf3f7823941b9e0", &
+  "f2244da30cb449300f01de6348", &
+  "19043d66c33926a9849a3d3188", &
+  "dd7d8234a953bb695ed6c89240", &
+  "24f233d9168f595680fe99eec8", &
+  "177d16017d598f7e1ed3497ac8", &
+  "387ec44871f376c96bcd0aec38", &
+  "08f596acd411469152d30bf6d8", &
+  "27239f5ee0f8198c8b3b1819a0", &
+  "c69382b7dbe81f06983ed4f2f0", &
+  "d9d2c29710af363c5f455dbcf8", &
+  "6e4c7ae7ee52c11db7daf40b10", &
+  "9b2ef437f6506531445a4a6690", &
+  "86d5489e3df6deb548094a61c8", &
+  "7cf277ada2132560d6ba744830", &
+  "471b62ad5c7e351b44ef9f29a8", &
+  "bfbb8689f7ded0062e48a6e6b8", &
+  "380a6a5250f6562b21e157d250", &
+  "5f1928d58631d732dfa3395db0", &
+  "d2eef1368dbea33be523fa9ef0", &
+  "8a55e2c622d7240e23492d9190", &
+  "8fc03eac7c719359c4af4a4c48", &
+  "62af8467903663f97025de06c8", &
+  "1ecb7b94b903e532986f1c36e0", &
+  "d2918b3db705d74b2ba2ec1a20", &
+  "1571fd0dc3bd259d14eabd6838", &
+  "18be78df70f98cc281af2e3580", &
+  "e547da7243f7d5309626a4aec0", &
+  "1bac17b4f2bb086bf63d6f1930", &
+  "0864932f8d6ec6ef479d450db8", &
+  "10aa89da9daa4c1fb7a4288ab0"/
diff --git a/lib/fsk4hf/ldpc_174_101_reordered_parity.f90 b/lib/fsk4hf/ldpc_174_101_reordered_parity.f90
new file mode 100644
index 000000000..0b09f0374
--- /dev/null
+++ b/lib/fsk4hf/ldpc_174_101_reordered_parity.f90
@@ -0,0 +1,258 @@
+data Mn/   &
+   2,  54,  72, &
+  18,  60,  62, &
+  13,  24,  47, &
+   5,  19,  23, &
+   6,  21,  47, &
+  10,  33,  73, &
+   7,  31,  50, &
+   3,  30,  66, &
+   8,  39,  70, &
+  36,  46,  63, &
+  16,  53,  55, &
+  12,  60,  61, &
+  17,  63,  67, &
+  24,  59,  64, &
+  25,  27,  68, &
+  14,  35,  44, &
+  28,  57,  72, &
+  32,  48,  51, &
+  26,  38,  46, &
+  11,  22,  49, &
+  34,  52,  69, &
+  45,  56,  65, &
+  40,  41,  42, &
+  31,  51,  54, &
+  42,  58,  69, &
+  29,  36,  43, &
+   4,  10,  12, &
+   2,  27,  64, &
+   3,  41,  70, &
+   1,  37,  72, &
+   5,  40,  59, &
+   6,  19,  39, &
+   7,  53,  68, &
+   8,  35,  47, &
+   9,  48,  66, &
+  11,  18,  36, &
+  13,  20,  29, &
+  15,  28,  46, &
+  16,  23,  54, &
+  17,  52,  57, &
+  21,  26,  62, &
+  22,  63,  73, &
+  24,  51,  65, &
+  25,  30,  43, &
+  32,  47,  61, &
+  33,  56,  71, &
+  15,  34,  45, &
+  38,  43,  60, &
+  44,  50,  67, &
+   3,  49,  58, &
+  22,  55,  72, &
+   1,  13,  53, &
+   2,  20,  69, &
+   4,  46,  49, &
+   5,   9,  45, &
+   6,  11,  65, &
+   7,  35,  57, &
+   8,  11,  38, &
+  10,  29,  32, &
+  12,  16,  21, &
+  14,  64,  71, &
+  17,  41,  68, &
+   1,  18,  66, &
+  19,  58,  64, &
+  23,  24,  48, &
+  25,  31,  67, &
+  26,  42,  44, &
+  27,  40,  50, &
+  28,  56,  62, &
+  30,  37,  63, &
+  33,  54,  70, &
+  34,  36,  73, &
+  39,  55,  61, &
+   9,  52,  59, &
+  50,  54,  60, &
+   2,   4,  16, &
+   3,  20,  31, &
+   5,  55,  67, &
+   6,  44,  48, &
+   7,  28,  52, &
+   8,  29,  30, &
+  10,  24,  49, &
+  12,  57,  66, &
+  13,  42,  73, &
+  14,  19,  21, &
+  15,  27,  36, &
+  17,  39,  43, &
+  18,  51,  61, &
+  22,  23,  60, &
+  25,  46,  70, &
+  26,  58,  59, &
+  32,  63,  71, &
+   5,  33,  65, &
+  34,  41,  53, &
+  35,  37,  41, &
+  38,  68,  73, &
+  30,  40,  69, &
+  39,  45,  62, &
+  47,  69,  72, &
+   4,  37,  56, &
+   1,  31,  48, &
+   1,  21,  58, &
+   2,   5,  62, &
+   3,  27,  57, &
+   4,  43,  51, &
+   6,  53,  59, &
+  14,  28,  40, &
+   7,  29,  66, &
+   8,  42,  72, &
+   9,  31,  36, &
+  10,  35,  55, &
+  11,  13,  54, &
+  12,  63,  65, &
+  14,  22,  69, &
+  20,  41,  48, &
+  15,  16,  70, &
+  27,  38,  56, &
+  17,  47,  56, &
+  18,  45,  50, &
+  19,  30,  44, &
+  20,  60,  71, &
+  23,  28,  61, &
+  24,  25,  39, &
+  51,  69,  70, &
+  26,  34,  67, &
+  33,  39,  66, &
+  32,  37,  38, &
+  19,  36,  57, &
+  40,  49,  52, &
+  13,  46,  50, &
+  48,  64,  73, &
+  15,  17,  59, &
+  22,  26,  68, &
+  12,  37,  64, &
+  52,  55,  71, &
+  49,  53,  62, &
+  17,  18,  23, &
+   1,  44,  65, &
+  25,  32,  34, &
+   1,  41,  43, &
+  33,  41,  46, &
+   2,  35,  63, &
+  30,  45,  72, &
+  31,  61,  73, &
+  21,  29,  52, &
+   3,   6,  60, &
+   2,  61,  66, &
+   4,   7,  42, &
+   4,   6,  34, &
+   3,  13,  14, &
+   9,  38,  58, &
+   5,  43,  47, &
+   8,  68,  71, &
+  10,  19,  26, &
+   5,  37,  68, &
+  16,  20,  30, &
+  12,  39,  40, &
+   7,  11,  64, &
+  18,  25,  35, &
+  48,  57,  62, &
+  21,  45,  73, &
+  54,  58,  67, &
+   9,  16,  24, &
+  27,  51,  55, &
+  33,  53,  69, &
+  20,  28,  67, &
+   8,  31,  59, &
+  22,  29,  56, &
+  37,  50,  70, &
+  32,  44,  49, &
+  10,  11,  15, &
+   4,   9,  14, &
+  23,  42,  65, &
+   1,  15,  71/
+
+data Nm/   &
+  30,  52,  63, 101, 102, 138, 140, 174, &
+   1,  28,  53,  76, 103, 142, 147,   0, &
+   8,  29,  50,  77, 104, 146, 150,   0, &
+  27,  54,  76, 100, 105, 148, 149, 172, &
+   4,  31,  55,  78,  93, 103, 152, 155, &
+   5,  32,  56,  79, 106, 146, 149,   0, &
+   7,  33,  57,  80, 108, 148, 158,   0, &
+   9,  34,  58,  81, 109, 153, 167,   0, &
+  35,  55,  74, 110, 151, 163, 172,   0, &
+   6,  27,  59,  82, 111, 154, 171,   0, &
+  20,  36,  56,  58, 112, 158, 171,   0, &
+  12,  27,  60,  83, 113, 134, 157,   0, &
+   3,  37,  52,  84, 112, 130, 150,   0, &
+  16,  61,  85, 107, 114, 150, 172,   0, &
+  38,  47,  86, 116, 132, 171, 174,   0, &
+  11,  39,  60,  76, 116, 156, 163,   0, &
+  13,  40,  62,  87, 118, 132, 137,   0, &
+   2,  36,  63,  88, 119, 137, 159,   0, &
+   4,  32,  64,  85, 120, 128, 154,   0, &
+  37,  53,  77, 115, 121, 156, 166,   0, &
+   5,  41,  60,  85, 102, 145, 161,   0, &
+  20,  42,  51,  89, 114, 133, 168,   0, &
+   4,  39,  65,  89, 122, 137, 173,   0, &
+   3,  14,  43,  65,  82, 123, 163,   0, &
+  15,  44,  66,  90, 123, 139, 159,   0, &
+  19,  41,  67,  91, 125, 133, 154,   0, &
+  15,  28,  68,  86, 104, 117, 164,   0, &
+  17,  38,  69,  80, 107, 122, 166,   0, &
+  26,  37,  59,  81, 108, 145, 168,   0, &
+   8,  44,  70,  81,  97, 120, 143, 156, &
+   7,  24,  66,  77, 101, 110, 144, 167, &
+  18,  45,  59,  92, 127, 139, 170,   0, &
+   6,  46,  71,  93, 126, 141, 165,   0, &
+  21,  47,  72,  94, 125, 139, 149,   0, &
+  16,  34,  57,  95, 111, 142, 159,   0, &
+  10,  26,  36,  72,  86, 110, 128,   0, &
+  30,  70,  95, 100, 127, 134, 155, 169, &
+  19,  48,  58,  96, 117, 127, 151,   0, &
+   9,  32,  73,  87,  98, 123, 126, 157, &
+  23,  31,  68,  97, 107, 129, 157,   0, &
+  23,  29,  62,  94,  95, 115, 140, 141, &
+  23,  25,  67,  84, 109, 148, 173,   0, &
+  26,  44,  48,  87, 105, 140, 152,   0, &
+  16,  49,  67,  79, 120, 138, 170,   0, &
+  22,  47,  55,  98, 119, 143, 161,   0, &
+  10,  19,  38,  54,  90, 130, 141,   0, &
+   3,   5,  34,  45,  99, 118, 152,   0, &
+  18,  35,  65,  79, 101, 115, 131, 160, &
+  20,  50,  54,  82, 129, 136, 170,   0, &
+   7,  49,  68,  75, 119, 130, 169,   0, &
+  18,  24,  43,  88, 105, 124, 164,   0, &
+  21,  40,  74,  80, 129, 135, 145,   0, &
+  11,  33,  52,  94, 106, 136, 165,   0, &
+   1,  24,  39,  71,  75, 112, 162,   0, &
+  11,  51,  73,  78, 111, 135, 164,   0, &
+  22,  46,  69, 100, 117, 118, 168,   0, &
+  17,  40,  57,  83, 104, 128, 160,   0, &
+  25,  50,  64,  91, 102, 151, 162,   0, &
+  14,  31,  74,  91, 106, 132, 167,   0, &
+   2,  12,  48,  75,  89, 121, 146,   0, &
+  12,  45,  73,  88, 122, 144, 147,   0, &
+   2,  41,  69,  98, 103, 136, 160,   0, &
+  10,  13,  42,  70,  92, 113, 142,   0, &
+  14,  28,  61,  64, 131, 134, 158,   0, &
+  22,  43,  56,  93, 113, 138, 173,   0, &
+   8,  35,  63,  83, 108, 126, 147,   0, &
+  13,  49,  66,  78, 125, 162, 166,   0, &
+  15,  33,  62,  96, 133, 153, 155,   0, &
+  21,  25,  53,  97,  99, 114, 124, 165, &
+   9,  29,  71,  90, 116, 124, 169,   0, &
+  46,  61,  92, 121, 135, 153, 174,   0, &
+   1,  17,  30,  51,  99, 109, 143,   0, &
+   6,  42,  72,  84,  96, 131, 144, 161/
+
+data nrw/    &
+8,7,7,8,8,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,  &
+7,7,7,7,7,7,7,7,7,8,8,7,7,7,7,7,8,7,8,7,  &
+8,7,7,7,7,7,7,8,7,7,7,7,7,7,7,7,7,7,7,7,  &
+7,7,7,7,7,7,7,7,8,7,7,7,8/
+
+ncw=3