def test_5():
G = numpy.array([[1, 1, 1,1], [1, 0, 1,1], [0, 1, 1,1]])
print "Testing hard-decision decoding with no errors, G =", str(G.tolist())
for i in range(100):
message = numpy.random.random_integers(0, 1, 10)
voltages = viterbi.convolutional_encode(message, G)
decoded_message = decode(voltages, G)
test_equality(message, decoded_message, voltages)
def test_3():
G = numpy.array([[1, 1, 1], [1, 1, 0]])
print "Testing hard-decision decoding with errors, G =", str(G.tolist())
for i in range(100):
message = numpy.random.random_integers(0, 1, 10)
voltages = viterbi.convolutional_encode(message, G)
# Make sure the errors are spaced far apart, and not too close
# to the end of the message.
err1 = random.randint(0, 4)
err2 = random.randint(11, 15)
voltages[err1] = 1 - voltages[err1]
voltages[err2] = 1 - voltages[err2]
decoded_message = decode(voltages, G)
test_equality(message, decoded_message, voltages)