#!/bin/sh# These tests investigate what happens when the wrong model is used for# decoding.  A (1800,1000) LDPC code with 3 check per bit is used.# Testing is done by transmitting random messages.  Decoding is done using # a maximum of 100 iterations of probability propagation.## The first set of tests compares decoding of messages sent through an # AWGN channel using the correct AWGN model with sigma=0.90 to decoding # using AWGN models with incorrect values for sigma and to decoding # using AWLN models with varying width parameters for the logistic noise# distribution.  ## A second set of tests compares decoding of messages sent through an# AWLN channel using the correct AWLN model with width=0.50 to decoding# using AWLN models with incorrect values for width and to decoding # using AWGN models with varying sigma parameters.set -e  # Stop if an error occursset -v  # Echo commands as they are readmake-ldpc ex-wrong-model.pchk 1000 1800 1 evenboth 3 no4cyclemake-gen  ex-wrong-model.pchk ex-wrong-model.gen denserand-src  ex-wrong-model.src 1 800x1000encode    ex-wrong-model.pchk ex-wrong-model.gen ex-wrong-model.src \          ex-wrong-model.enc# FIRST SET OF TESTS, TRANSMITTING THROUGH AWGN CHANNEL WITH SIGMA=0.90transmit  ex-wrong-model.enc ex-wrong-model.rec 1 awgn 0.90# DECODING WITH CORRECT AWGN NOISE MODEL, SIGMA=0.90decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 0.90 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=0.95decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 0.95 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=0.85decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 0.85 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.40decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.40 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.45decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.45 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.50decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.50 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.55decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.55 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.60decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.60 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.65decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.65 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # SECOND SET OF TESTS, TRANSMITTING THROUGH AWLN CHANNEL WITH WIDTH=0.50transmit  ex-wrong-model.enc ex-wrong-model.rec 1 awln 0.50# DECODING WITH CORRECT AWLN NOISE MODEL, WIDTH=0.50decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.50 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.55decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.55 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWLN NOISE MODEL, WIDTH=0.45decode    ex-wrong-model.pchk ex-wrong-model.rec - awln 0.45 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=0.80decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 0.80 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=0.85decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 0.85 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=0.90decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 0.90 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=0.95decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 0.95 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=1.00decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 1.00 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src # DECODING WITH AWGN NOISE MODEL, SIGMA=1.05decode    ex-wrong-model.pchk ex-wrong-model.rec - awgn 1.05 prprp 100 \ | verify ex-wrong-model.pchk - ex-wrong-model.gen ex-wrong-model.src