Tail biting convolutional encoder

Convolutionally encode binary data considering initial value of shift registers

Structure of this tail biting convolutional encoder is as described in ETSI TS 136 212 V13.0.0.
For LTE channel coding simulation you have to use trellStr = poly2trellis(7, [133 171 165]).
The initial value of the shift register of the encoder shall be set to the values corresponding to the last 6 information bits in the input stream.
It defines tail biting convolutional code with constraint length 7 and coding rate 1/3.