#!/bin/sh
# this script characterizes a single code over a narrow range of Eb/No
# note relationship between noise standard deviation, sigma, and Eb/No:
# Eb/No = 1/(2*R*sigma^2)
# If R=1/2, then Eb/No = 1/sigma^2  Right? Check this. 

set -e  # Stop if an error occurs
set -v  # Echo commands as they are read

#make-ldpc ldpc-144-72.pchk 80 160 12 evenboth 6x3/4x4 no4cycle
#make-ldpc ldpc-144-72.pchk 72 144 33 evenboth 6x3/4x4 no4cycle
#make-ldpc ldpc-144-72.pchk 72 144 8 evenboth 3 no4cycle
#make-ldpc ldpc-144-72.pchk 72 144 1087 evenboth 3x3/7x4 no4cycle
#make-ldpc ldpc-144-72.pchk 72 144 1022 evenboth 4x3/6x4 no4cycle
make-ldpc ldpc-144-72.pchk 72 144 3012 evenboth 3x3/7x4 no4cycle

#cp ldpc-144-72-6x3-4x4-sf1.pchk ldpc-144-72.pchk
make-gen  ldpc-144-72.pchk ldpc-144-72.gen dense
rand-src  ldpc-144-72.src 2 72x1000000
encode    ldpc-144-72.pchk ldpc-144-72.gen ldpc-144-72.src \
          ldpc-144-72.enc

# NOISE STANDARD DEVIATION 0.75, Eb/N0 = 2.50 dB

transmit ldpc-144-72.enc ldpc-144-72.rec 1 awgn 0.75
decode   ldpc-144-72.pchk ldpc-144-72.rec ldpc-144-72.dec awgn 0.75\
         prprp 250
verify   ldpc-144-72.pchk ldpc-144-72.dec ldpc-144-72.gen \
         ldpc-144-72.src 

# NOISE STANDARD DEVIATION 0.80, Eb/N0 = 1.94 dB

transmit ldpc-144-72.enc ldpc-144-72.rec 1 awgn 0.80
decode   ldpc-144-72.pchk ldpc-144-72.rec ldpc-144-72.dec awgn 0.80\
         prprp 250
verify   ldpc-144-72.pchk ldpc-144-72.dec ldpc-144-72.gen \
         ldpc-144-72.src 

# NOISE STANDARD DEVIATION 0.85, Eb/N0 = 1.41 dB

transmit ldpc-144-72.enc ldpc-144-72.rec 1 awgn 0.85
decode   ldpc-144-72.pchk ldpc-144-72.rec ldpc-144-72.dec awgn 0.85\
         prprp 250
verify   ldpc-144-72.pchk ldpc-144-72.dec ldpc-144-72.gen \
         ldpc-144-72.src 

# NOISE STANDARD DEVIATION 0.90, Eb/N0 = 0.92 dB

transmit ldpc-144-72.enc ldpc-144-72.rec 1 awgn 0.90
decode   ldpc-144-72.pchk ldpc-144-72.rec ldpc-144-72.dec awgn 0.90\
         prprp 250
verify   ldpc-144-72.pchk ldpc-144-72.dec ldpc-144-72.gen \
         ldpc-144-72.src 

# NOISE STANDARD DEVIATION 0.95, Eb/N0 = 0.45 dB

transmit ldpc-144-72.enc ldpc-144-72.rec 1 awgn 0.95
decode   ldpc-144-72.pchk ldpc-144-72.rec ldpc-144-72.dec awgn 0.95\
         prprp 250
verify   ldpc-144-72.pchk ldpc-144-72.dec ldpc-144-72.gen \
         ldpc-144-72.src