Channel decoding method, apparatus, and system

A channel decoding method, wherein the method comprises:

• obtaining decoding information of first channel decoding of a data block, wherein the decoding information of the first channel decoding comprises a decoding result of the first channel decoding of the data block and a demodulated soft value of the data block;
• determining whether the first channel decoding fails based on a check on the decoding result of the first channel decoding of the data block;
• in response to determining that the first channel decoding fails, obtaining a reference sequence number of the data block according to the decoding result of the first channel decoding of the data block;
• obtaining at least one matching historical demodulated soft value from a historical demodulated soft value record table according to the reference sequence number of the data block, wherein the historical demodulated soft value record table comprises at least one historical demodulated soft value record, and each of the at least one historical demodulated soft value record comprises a historical demodulated soft value and a reference sequence number of a data block corresponding to the historical demodulated soft value;
• combining the demodulated soft value of the data block and the at least one matching historical demodulated soft value to obtain a combined demodulated soft value of the data block;
• and
• performing second channel decoding on the combined demodulated soft value of the data block.

A channel decoding system, wherein the system comprises:

• a demodulator, configured to demodulate a received data block to obtain a demodulated soft value of the data block;
• a first channel decoding apparatus, comprising:
• a memory storing instructions;
• and
• a processor coupled to the memory to execute the instructions to perform first channel decoding of the data block by decoding the demodulated soft value of the data block obtained by the demodulator;
• and
• a second channel decoding apparatus comprising:
• a memory storing instructions;
• and
• a processor coupled to the memory to execute the instructions to:
• obtain decoding information of the first channel decoding of the data block, wherein the decoding information of the first channel decoding comprises a decoding result of the first channel decoding of the data block and a demodulated soft value of the data block;
• determine whether the first channel decoding fails based on a check on the decoding result of the first channel decoding of the data block;
• in response to determining that the first channel decoding fails, obtain a reference sequence number of the data block according to the decoding result of the first channel decoding of the data block;
• obtain at least one matching historical demodulated soft value from a historical demodulated soft value record table according to the reference sequence number of the data block, wherein the historical demodulated soft value record table comprises at least one historical demodulated soft value record, and each of the at least one historical demodulated soft value record comprises a historical demodulated soft value and a reference sequence number of a data block corresponding to the historical demodulated soft value;
• combine the demodulated soft value of the data block and the at least one matching historical demodulated soft value to obtain a combined demodulated soft value of the data block;
• and
• perform second channel decoding on the combined demodulated soft value of the data block.