Code mixer

The utility model provides a code mixer, comprising a linear shift register and a plurality of logic switches and a plurality of multiplexers. The linear shift register is used for generating a code-mixing sequence according to a predetermined generator sequence, and the logic switch can input the code-mixing sequence to the shift register in parallel; the multiplexer can choose the input signal which enters into the shift register, and the shift register can load predetermined starting value, the displacement single position or the positioning for the displacement predetermined number so as to pass through the generator sequence.