Channel decoding method and apparatus in wireless communications
This application provides an encoding method and apparatus in wireless communications between a network device and a terminal. The method includes: performing cyclic redundancy check (CRC) encoding on A to-be-encoded information bits based on a CRC polynomial, to obtain a first bit sequence, where the first bit sequence includes L CRC bits and A information bits, L=11; and performing polar encoding on the first bit sequence.
1. A decoding method, comprising:
obtaining, by a decoding apparatus, a to-be-decoded sequence;
performing, by the decoding apparatus, polar decoding on the to-be-decoded sequence based on a cyclic redundancy check (CRC) polynomial, to obtain a polar-decoded bit sequence, wherein the polar-decoded bit sequence comprises L CRC bits and A information bits, L and A are positive integers, L=11, and the CRC polynomial is any one of the following polynomials:
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}5+1;
D{circumflex over ( )}11+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}2+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}6+D{circumflex over ( )}4+D{circumflex over ( )}2+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}5+D+1:
D{circumflex over ( )}11+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D+1;
D{circumflex over ( )}11+D +D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}7+D{circumflex over ( )}5+D{circumflex over ( )}4+D+1;
D{circumflex over ( )}11+D10+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}8+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}4+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}3+D{circumflex over ( )}2+D+1; or
D{circumflex over ( )}11+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}4+D{circumflex over ( )}3+D{circumflex over ( )}2+D+1; and
outputting, by the decoding apparatus, the polar-decoded bit sequence.
2. The method according to claim 1 , wherein the L CRC bits in the polar-decoded bit sequence are located after the A information bits.
3. The method according to claim 1 , wherein before obtaining the to-be-decoded sequence, the method further comprises:
obtaining information or data from a transmit end; and
performing rate de-matching on the information or data to obtain the to-be-decoded sequence.
4. The method according to claim 1 , wherein the decoding apparatus is a base station or a terminal.
5. A decoding apparatus, comprising at least one processor coupled with at least one memory storing programming instructions for execution by the at least one processor to perform operations comprising:
obtaining a to-be-decoded sequence; and
performing polar decoding on the to-be-decoded sequence based on a cyclic redundancy check (CRC) polynomial, to obtain a polar-decoded bit sequence, wherein the polar-decoded bit sequence comprises L CRC bits and A information bits, L and A are positive integers, L=11, and the CRC polynomial is any one of the following polynomials:
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}5+1;
D{circumflex over ( )}11+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}2+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}6+D{circumflex over ( )}4+D{circumflex over ( )}2+1:
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}5+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}7+D{circumflex over ( )}5+D{circumflex over ( )}4+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}8+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}4+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}3+D{circumflex over ( )}2+D+1; or
D{circumflex over ( )}11+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}4+D{circumflex over ( )}3+D{circumflex over ( )}2+D+1.
6. The apparatus according to claim 5 , wherein the decoding apparatus further comprises the at least one memory storing the programming instructions for execution by the at least one processor.
7. The apparatus according to claim 5 , wherein the L CRC bits in the polar-decoded bit sequence are located after the A information bits.
8. The apparatus according to 5 , wherein the operations comprise: before obtaining the to-be-decoded sequence,
obtaining information or data from a transmit end; and
performing rate de-matching on the information or data to obtain the to-be-decoded sequence.
9. The apparatus according to claim 5 , wherein the apparatus is a base station or a terminal.
10. The apparatus according to claim 5 , wherein the apparatus is a chip.
11. A non-transitory computer readable storage medium, configured to store a computer program, and when run by a communications device, the computer program causes the decoding apparatus to perform operations comprising:
obtaining a to-be-decoded sequence; and
performing polar decoding on the to-be-decoded sequence based on a cyclic redundancy check (CRC) polynomial, to obtain a polar-decoded bit sequence, wherein the polar-decoded bit sequence comprises L CRC bits and A information bits, L and A are positive integers, L=11, and the CRC polynomial is any one of the following polynomials:
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}5+1;
D{circumflex over ( )}11+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}2+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}6+D{circumflex over ( )}4+D{circumflex over ( )}2+1:
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}5+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}7+D{circumflex over ( )}5+D{circumflex over ( )}4+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}8+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}4+D{circumflex over ( )}3+D+1;
D{circumflex over ( )}11+D{circumflex over ( )}10+D{circumflex over ( )}9+D{circumflex over ( )}7+D{circumflex over ( )}6+D{circumflex over ( )}3+D{circumflex over ( )}2+D+1; or
D{circumflex over ( )}11+D{circumflex over ( )}8+D{circumflex over ( )}6+D{circumflex over ( )}5+D{circumflex over ( )}4+D{circumflex over ( )}3+D{circumflex over ( )}2+D+1.
12. The non-transitory computer readable storage medium according to claim 11 , wherein the L CRC bits in the polar-decoded bit sequence are located after the A information bits.
13. The non-transitory computer readable storage medium according to 11, wherein the operations further comprise: before obtaining the to-be-decoded sequence,
obtaining information or data from a transmit end; and
performing rate de-matching on the information or data to obtain the to-be-decoded sequence.