Device and method for encoding or decoding polar code in communication system
A method of a transmitting device in a wireless communication system, includes: obtaining an encoded bit stream from information bits using a polar code; transmitting a first signal generated through a first modulation of the encoded bit stream; performing reverse mapping on the encoded bit stream; and transmitting a second signal generated through a second modulation of the reverse-mapped encoded bit stream.
1. A method performed by a transmitting device in a wireless communication system, the method comprising:
generating, using a polar code, an encoded bit stream from information bits;
transmitting a first signal generated by a first modulation of a first demultiplexed bit stream, wherein the first demultiplexed bit stream is generated based on the encoded bit stream using a demultiplexer (DEMUX);
transmitting a second signal generated by a second modulation of a second demultiplexed bit stream, wherein the second demultiplexed bit stream is generated based on the encoded bit stream using the DEMUX and a cyclic shift of a designated size,
wherein a mapping order of the second demultiplexed bit stream is reverse of a mapping order of the first demultiplexed bit stream.
2. The method of claim 1 , wherein information on the cyclic shift of the designated size is configured via a radio resource control (RRC) message.
3. The method of claim 1 , wherein the second demultiplexed bit stream is generated based on an interleaving according to a transmit count of the encoded bit stream.
4. The method of claim 1 , wherein the first modulation or the second modulation is 16 quadrature amplitude modulation (QAM), 64 QAM, 256 QAM, or 1024 QAM.
5. A method performed by a receiving device in a wireless communication system, the method comprising:
receiving a first signal generated by a first modulation of a first demultiplexed bit stream, wherein the first demultiplexed bit stream is generated using a demultiplexer (DEMUX);
receiving a second signal generated by a second modulation of a second demultiplexed bit stream, wherein the second demultiplexed bit stream is generated based on an encoded bit stream using the DEMUX and a cyclic shift of a designated size; and
obtaining information bits of a bit stream by combining the first signal and the second signal,
wherein the bit stream is encoded using a polar code, and
wherein a mapping order of the second demultiplexed bit stream is reverse of a mapping order of the first demultiplexed bit stream.
6. The method of claim 5 , wherein information on the cyclic shift of the designated size is configured via a radio resource control (RRC) message.
7. The method of claim 5 , wherein the second demultiplexed bit stream is generated based on an interleaving according to a transmit count of the bit stream.
8. The method of claim 5 , wherein the first modulation or the second modulation is 16 quadrature amplitude modulation (QAM), 64 QAM, 256 QAM, or 1024 QAM.
9. A transmitting device in a wireless communication system, the transmitting device comprising:
a transceiver; and
a controller configured to:
generate, using a polar code, an encoded bit stream from information bits,
transmit a first signal generated by a first modulation of a first demultiplexed bit stream, wherein the first demultiplexed bit stream is generated based on the encoded bit stream using a demultiplexer (DEMUX),
transmit a second signal generated by a second modulation of a second demultiplexed bit stream, wherein the second demultiplexed bit stream is generated based on the encoded bit stream using the DEMUX and a cyclic shift of a designated size,
wherein a mapping order of the second demultiplexed bit stream is reverse of a mapping order of the first demultiplexed bit stream.
10. A receiving device in a wireless communication system, the receiving device comprising:
a transceiver; and
a controller configured to:
receive a first signal generated by a first modulation of a first demultiplexed bit stream, wherein the first demultiplexed bit stream is generated using a demultiplexer (DEMUX),
receive a second signal generated by a second modulation of a second demultiplexed bit stream, wherein the second demultiplexed bit stream is generated based on an encoded bit stream using the DEMUX and a cyclic shift of a designated size, and
obtain information bits of a bit stream by combining the first signal and the second signal,
wherein the bit stream is encoded using a polar code, and
wherein a mapping order of the second demultiplexed bit stream is reverse of a mapping order of the first demultiplexed bit stream.