commpy.channelcoding.turbo_encode

turbo_encode(msg_bits, trellis1, trellis2, interleaver)

Turbo Encoder.

Encode Bits using a parallel concatenated rate-1/3 turbo code consisting of two rate-1/2 systematic convolutional component codes.

Parameters:

• msg_bits (1D ndarray containing {0, 1}) – Stream of bits to be turbo encoded.
• trellis1 (Trellis object) – Trellis representation of the first code in the parallel concatenation.
• trellis2 (Trellis object) – Trellis representation of the second code in the parallel concatenation.
• interleaver (Interleaver object) – Interleaver used in the turbo code.

Returns:

[sys_stream, non_sys_stream1, non_sys_stream2] – Encoded bit streams corresponding to the systematic output

and the two non-systematic outputs from the two component codes.

Return type:

list of 1D ndarrays