Method for performing polar coding and apparatus therefor
A method for performing polar encoding includes the steps of, if a length of a codeword is greater than 2 x and smaller than 2 x+1 , determining whether encoding is performed by a polar encoder of size 2 x or a polar encoder of size 2 x+1 according to whether or not a length of the codeword is smaller than a prescribed value, and if the length of the codeword is smaller than the prescribed value, performing encoding by the polar encoder of the size 2 x .
1. A method for performing polar encoding by a communication apparatus, the method comprising:
when a length of a codeword is greater than 2 x and smaller than 2 x+1 and the length of the codeword is smaller than a prescribed threshold value, performing encoding by a polar encoder of size 2 x ; and
when the length of a codeword is greater than 2 x and smaller than 2 x+1 and the length of the codeword is not smaller than the prescribed threshold value, performing encoding by a polar encoder of size 2 x+1 .
2. The method of claim 1 , further comprising:
generating an encoded bit sequence of size N by performing repetition on N-2 x bits when the length of the codeword corresponds to N.
3. The method of claim 1 , further comprising:
generating an encoded bit sequence of size N by performing puncturing on 2 x+1 −N bits when the length of the codeword corresponds to N.
4. The method of claim 1 , further comprising:
performing interleaving encoded bits outputted from the polar encoder of the size of 2 x or the polar encoder of the size of 2 x +1 .
5. The method of claim 1 , wherein the length of the codeword is a size of an encoded codeword for data payload including cyclic redundancy check (CRC) generated in a higher layer of the communication apparatus.
6. A communication apparatus performing polar encoding, the communication apparatus:
a polar encoder of size 2 x configured to perform encoding when a length of a codeword is greater than 2 x and smaller than 2 x+1 and the length of the codeword is smaller than a prescribed threshold value; and
a polar encoder of size 2 x+1 configured to perform encoding when the length of a codeword is greater than 2 x and smaller than 2 x+1 and the length of the codeword is not smaller than the prescribed threshold value.
7. The communication apparatus of claim 6 , wherein the polar encoder is configured to generate an encoded bit sequence of size N by performing repetition on N−2 x bits when the length of the codeword corresponds to N.
8. The communication apparatus of claim 7 , further comprising an interleaver configured to perform interleaving encoded bits outputted from the polar encoder of the size of 2 x or the polar encoder of the size of 2 x+1 .
9. The communication apparatus of claim 6 , further comprising a processor configured to generate an encoded bit sequence of size N by performing puncturing on 2 x+1 −N bits when the length of the codeword corresponds to N.
10. The communication apparatus of claim 6 , wherein the length of the codeword is a size of an encoded codeword for data payload including cyclic redundancy check (CRC) generated in a higher layer of the communication apparatus.