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Diffstat (limited to 'gr-dtv/examples/README.dvbs')
| -rw-r--r-- | gr-dtv/examples/README.dvbs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gr-dtv/examples/README.dvbs b/gr-dtv/examples/README.dvbs new file mode 100644 index 0000000000..d9097c4876 --- /dev/null +++ b/gr-dtv/examples/README.dvbs @@ -0,0 +1,26 @@ +Puncturing values for DVB-S code rates: + +1/2 code rate = Puncture Size = 2, Puncture Pattern = 0b11 +2/3 code rate = Puncture Size = 4, Puncture Pattern = 0b1101 +3/4 code rate = Puncture Size = 6, Puncture Pattern = 0b110110 +5/6 code rate = Puncture Size = 10, Puncture Pattern = 0b1101100110 +7/8 code rate = Puncture Size = 14, Puncture Pattern = 0b11010101100110 + +A test Transport Stream for the example flow graph +(8 Msyms/s and 7/8 code rate) is available here: + +http://www.w6rz.net/advdvbs78.ts + +It is 170,950,844 bytes. + +This stream can also be used at: + +14 Msyms/s 1/2 code rate +10.5 MSyms/s 2/3 code rate +9.333333 MSyms/s 3/4 code rate +8.4 Msyms/s 5/6 code rate + +The equation for calculating the correct Transport Stream bit-rate is: + +TS bit-rate = symbol rate * 2 * code rate * (188 / 204) + |