Method and apparatus for channel encoding/decoding in communication or broadcast system

A method of channel encoding performed by a transmitter in a communication system, the method comprising:

• performing outer coding, based on an outer channel code, of input bits that indicate first data;
• identifying a bit group size;
• identifying a plurality of bit groups based on an output of the outer coding, the plurality of bit groups each having the bit group size;
• determining a first cyclic shift value corresponding to second data and a second cyclic shift value;
• performing quasi-cyclic shifting, based on the first cyclic shift value, of the plurality of bit groups to generate a first quasi-cyclic shifted output;
• performing quasi-cyclic shifting, based on the second cyclic shift value, of the plurality of bit groups to generate a second quasi-cyclic shifted output;
• performing inner coding, based on an inner channel code, of the first quasi-cyclic shifted output and the second quasi-cyclic shifted output;
• and
• transmitting at least a part of an output of the inner coding.

A receiver in a communication system, the receiver comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive a first signal and a second signal corresponding to input bits,
• identify first values based on the first received signal and second values based on the second received signal,
• identify groups of the first values and groups of the second values, each of the groups of the first values and the groups of the second values having a bit group size,
• perform quasi-cyclic shifting of the groups of the second values based on the bit group size and an integer,
• combine the groups of the first values and the quasi-cyclic shifted groups of the second values,
• perform inner decoding, based on an inner channel code, on the combined values,
• perform outer decoding, based on an outer channel code, on an output of the inner decoding, and
• identify the input bits that indicate first data from an output of the outer decoding,
• wherein the integer is identified as a difference between a first cyclic shift value applied to the groups of the first values and a second cyclic shift value applied to the groups of the second values, and
• wherein second data is identified based on the first cyclic shift value, in case that the outer decoding is successful.

A transmitter in a communication system, the transmitter comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• perform outer coding, based on an outer channel code, of input bits that indicate first data,
• identify a bit group size,
• identify a plurality of bit groups based on an output of the outer coding, the plurality of bit groups each having the bit group size;
• determine a first cyclic shift value corresponding to second data and a second cyclic shift value;
• perform quasi-cyclic shifting, based on the first cyclic shift value, of the plurality of bit groups to generate a first quasi-cyclic shifted output;
• perform quasi-cyclic shifting, based on the second cyclic shift value, of the plurality of bit groups to generate a second quasi-cyclic shifted output;
• perform inner coding, based on an inner channel code, of the first quasi-cyclic shifted output and the second quasi-cyclic shifted output;
• and
• transmit at least a part of an output of the inner coding.