A method of distributing CRC bits from a single CRC polynomial over a block of information bits for Polar codes via an interleaver to facilitate early termination and enhanced error correction is proposed and investigated. The interleaver is designed such that each CRC bit is placed in a decoding position as early as possible while keeping all the information bits that the CRC bit depends on in front of it in the successive decoding order. This allows the CRC bits to be used as dynamic frozen bits to assist surviving path selection during SC/SCL decoding to improve error performance. Furthermore, it allows the distributed CRC bits to be used for early error detection in the list decoding process and thus reduces the average decoding latency. Simulation results show that interleaved CRC can provide moderate benefits in improving error correction and reducing decoding latency through early error detection.
Interleaved CRC for Polar Codes
2018-06-01
673812 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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