Receiver for adjusting log likelihood ratio and method of operating the same

A receiver configured to receive a signal comprising a symbol, the receiver comprising:

• at least one memory storing instructions;
• and
• at least one processor configured to execute the instructions to:
• generate a first posteriori log likelihood ratio corresponding to a bit in the symbol based on a channel log likelihood ratio corresponding to the bit;
• compare a first extrinsic log likelihood ratio in the first posteriori log likelihood ratio with a first reference value to obtain a comparison result;
• generate a first priori log likelihood ratio by applying a scaled value to the first extrinsic log likelihood ratio based on the comparison result;
• generate a second posteriori log likelihood ratio corresponding to the bit based on the first priori log likelihood ratio and the channel log likelihood ratio;
• and
• decode the signal based on the second posteriori log likelihood ratio.

A method of operating a receiver, the method comprising:

• receiving a signal comprising a symbol;
• generating a first posteriori log likelihood ratio corresponding to a bit based on a channel log likelihood ratio corresponding to the bit in the symbol;
• comparing a sign of a first extrinsic log likelihood ratio in the first posteriori log likelihood ratio with a sign of a first reference value;
• generating a first priori log likelihood ratio by applying a scaled value to the first extrinsic log likelihood ratio based on a result of comparison;
• generating a second posteriori log likelihood ratio corresponding to the bit based on the first priori log likelihood ratio and the channel log likelihood ratio;
• and
• decoding the signal based on the second posteriori log likelihood ratio.