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# Copyright 2014-2023 Ron Economos
#
# This file is part of dtv-utils
#
# dtv-utils is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# dtv-utils is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with dtv-utils; see the file COPYING.  If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.

dtv-utils
============

Author: Ron Economos
Email: <[email protected]>

This project is a collection of utilities and scripts
for digital television projects using bladeRF and GNU Radio


dvbt-blade.py
----------------------------------

This Python script transmit a DVB-T digital television signal using the
bladeRF and gr-dvbt (https://github.com/BogdanDIA/gr-dvbt). A file
containing an MPEG-2 Transport Stream must be supplied as input.
Optionally, an output file can be specified to store the generated
IQ samples (in gr_complex floating point).

usage: dvbt-blade.py [-h] [-m MODE] [-c CH] [-C TYPE] [-r RATE] [-g D]
                     [-f FREQ] [--txvga1 gain] [--txvga2 gain] [-o OUT]
                     input-file

positional arguments:
  input-file            Input file

optional arguments:
  -h, --help            show this help message and exit
  -m MODE, --mode MODE  # of carriers. Options: t2k, t8k (default).
  -c CH, --channel CH   channel width in MHz. Options: 5, 6, 7, 8 (default).
  -C TYPE, --cons TYPE  constellation. qpsk, qam16, qam64 (default).
  -r RATE, --rate RATE  Viterbi rate. 1/2, 2/3, 3/4, 5/6, 7/8 (default).
  -g D, --guard D       guard interval. 1/32 (default), 1/16, 1/8, 1/4.
  -f FREQ, --freq FREQ  center frequency (Hz). Default is 429e6.
  --txvga1 gain         bladeRF TXVGA1 gain. Default is -6.
  --txvga2 gain         bladeRF TXVGA2 gain. Default is 9.
  -o OUT, --output OUT  write to specified file.


dvbtrate.c
----------------------------------

Calculates the precise Transport Stream bit-rate for all DVB-T
constellations, Viterbi code rates and guard intervals for a
given channel width.

usage: dvbtrate <channel bandwidth>

For example:

./dvbtrate 6


qam-blade.py
----------------------------------

This Python script transmit a ANSI/SCTE 07 2013 (also known as
ITU-T J.83 Annex B) 64-QAM digital television signal using the
bladeRF and gr-qam (https://github.com/argilo/gr-qam). A file
containing an MPEG-2 Transport Stream (at 26.970352 Mbps) must
be supplied as input. Optionally, an output file can be specified
to store the generated IQ samples (in gr_complex floating point).

Internal parameter values that can be changed:

The three parameters I_taps, J_increment and Control_Word can be
used to control the interleaver from the following table.

Control_Word    I_taps    J_increment
     0            128          1
     1            128          1
     2            128          2
     3             64          2
     4            128          3
     5             32          4
     6            128          4
     7             16          8
     8            128          5
     9              8          16
    10            128          6
    11          Reserved
    12            128          7
    13          Reserved
    14            128          8
    15          Reserved

The default is Control_Word = 6, I_taps = 128 and J_increment = 4
which seems to be the most commonly used on CATV systems.


dvbs2rate.c
----------------------------------

Calculates the precise Transport Stream bit-rate for all DVB-S2
constellations, LDPC code rates and pilots on/off for a given
symbol rate.

usage: dvbs2rate -sx <symbol rate>
Options:
	s = short FECFRAME rates
	x = DVB-S2X rates

For example:

./dvbs2rate 4500000
./dvbs2rate -s 4500000
./dvbs2rate -x 4500000
./dvbs2rate -sx 4500000


dvbt2rate.c
----------------------------------

Calculates the precise Transport Stream bit-rate for all DVB-T2 parameters.

dvbt2rate <channel bandwidth> <fft size> <guard interval> <number of data symbols> <number of FEC blocks> <code rate> <modulation> <frame size> <extended carrier> <pilot pattern> <L1 modulation>
Options:
	channel bandwidth = 0, 5, 6, 7, 8 or 10. The value 0 selects the 1.7 MHz mode.
	fft size = 1, 2, 4, 8, 16 or 32.
        guard interval = 0 = 1/32, 1 = 1/16, 2 = 1/8, 3 = 1/4, 4 = 1/128, 5 = 19/128, 6 = 19/256.
        number of data symbols = number of symbols after the P2 symbol(s).
        number of FEC blocks.
        code rate = 1 = 1/2, 2 = 3/5, 3 = 2/3, 4 = 3/4, 5 = 4/5, 6 = 5/6, 7 = 1/3, 8 = 2/5.
        modulation = 1 = QPSK, 2 = 16QAM, 3 = 64QAM, 4 = 256QAM.
        frame size = 0 = normal, 1 = short
        extended carrier = 0 normal, 1 = extended
        pilot pattern = 1, 2, 3, 4, 5, 6, 7, 8.
        L1 modulaton = 0 = BPSK, 1 = QPSK, 2 = 16QAM, 3 = 64QAM.

For example (BBC 40.2 Mbps parameters):

./dvbt2rate 8 32 4 59 202 3 4 0 1 7 3

There are also three compile time defines to control less often used parameters.

#undef NORMAL_MODE
#undef PAPR
#undef MISO

Change these to #define if one or more of these modes are in use.

Note that a valid configuration must fulfill two rules.

1) The frame time TF must be less than 250 milliseconds.

2) The number of dummy cells must be positive.


papr.c
----------------------------------

Calculates the PAPR (Peak to Average Power) of an IQ sample file (32-bit floating
point pairs). The peak PAPR, percentage of power above each dB level and the
value and position in the file of the peak IQ samples are printed.

usage: papr -g <infile>
Options:
	g = graph suitable output

For Example:

./papr atsc.cfile

The -g option outputs values in 0.1 dB steps suitable for graphing.


DVB-T Test bitstreams (all have the same content, [email protected] fps video and 448 kbps AC3 audio):

16QAM
8 MHz

http://www.w6rz.net/adv8dvbt12.ts /* 1/2 Viterbi rate 12.064171 Mbps TS rate */
http://www.w6rz.net/adv8dvbt23.ts /* 2/3 Viterbi rate 16.085561 Mbps TS rate */
http://www.w6rz.net/adv8dvbt34.ts /* 3/4 Viterbi rate 18.096256 Mbps TS rate */
http://www.w6rz.net/adv8dvbt56.ts /* 5/6 Viterbi rate 20.106951 Mbps TS rate */
http://www.w6rz.net/adv8dvbt78.ts /* 7/8 Viterbi rate 21.112299 Mbps TS rate */

7 MHz

http://www.w6rz.net/adv7dvbt23.ts /* 2/3 Viterbi rate 14.074866 Mbps TS rate */
http://www.w6rz.net/adv7dvbt34.ts /* 3/4 Viterbi rate 15.834224 Mbps TS rate */
http://www.w6rz.net/adv7dvbt56.ts /* 5/6 Viterbi rate 17.593582 Mbps TS rate */
http://www.w6rz.net/adv7dvbt78.ts /* 7/8 Viterbi rate 18.473262 Mbps TS rate */

6 MHz

http://www.w6rz.net/adv6dvbt23.ts /* 2/3 Viterbi rate 12.064171 Mbps TS rate */
http://www.w6rz.net/adv6dvbt34.ts /* 3/4 Viterbi rate 13.572192 Mbps TS rate */
http://www.w6rz.net/adv6dvbt56.ts /* 5/6 Viterbi rate 15.080213 Mbps TS rate */
http://www.w6rz.net/adv6dvbt78.ts /* 7/8 Viterbi rate 15.834224 Mbps TS rate */

64QAM
8 MHz

http://www.w6rz.net/adv8dvbt12qam64.ts /* 1/2 Viterbi rate 18.096256 Mbps TS rate */
http://www.w6rz.net/adv8dvbt23qam64.ts /* 2/3 Viterbi rate 24.128342 Mbps TS rate */
http://www.w6rz.net/adv8dvbt34qam64.ts /* 3/4 Viterbi rate 27.144385 Mbps TS rate */
http://www.w6rz.net/adv8dvbt56qam64.ts /* 5/6 Viterbi rate 30.160427 Mbps TS rate */
http://www.w6rz.net/adv8dvbt78qam64.ts /* 7/8 Viterbi rate 31.668449 Mbps TS rate */

7 MHz

http://www.w6rz.net/adv7dvbt12qam64.ts /* 1/2 Viterbi rate 15.834224 Mbps TS rate */
http://www.w6rz.net/adv7dvbt23qam64.ts /* 2/3 Viterbi rate 21.112299 Mbps TS rate */
http://www.w6rz.net/adv7dvbt34qam64.ts /* 3/4 Viterbi rate 23.751336 Mbps TS rate */
http://www.w6rz.net/adv7dvbt56qam64.ts /* 5/6 Viterbi rate 26.390374 Mbps TS rate */
http://www.w6rz.net/adv7dvbt78qam64.ts /* 7/8 Viterbi rate 27.709893 Mbps TS rate */

6 MHz

http://www.w6rz.net/adv6dvbt12qam64.ts /* 1/2 Viterbi rate 13.572192 Mbps TS rate */
http://www.w6rz.net/adv6dvbt23qam64.ts /* 2/3 Viterbi rate 18.096256 Mbps TS rate */
http://www.w6rz.net/adv6dvbt34qam64.ts /* 3/4 Viterbi rate 20.358288 Mbps TS rate */
http://www.w6rz.net/adv6dvbt56qam64.ts /* 5/6 Viterbi rate 22.620320 Mbps TS rate */
http://www.w6rz.net/adv6dvbt78qam64.ts /* 7/8 Viterbi rate 23.751336 Mbps TS rate */