133 This is the joint trellis of two trellises described in awgn1o2_4.fsm and awgn1o2_16.fsm
134 It is useful for application of joint decoding...
135 It can be generated in python as follows:
137 > f1=trellis.fsm('awgn1o2_4.fsm')
138 > f2=trellis.fsm('awgn1o2_16.fsm')
139 > f=trellis.fsm(f1,f2)
140 > f.write_fsm_txt('joint_4_16.fsm')