5G • RAN
Polar Codes
3GPP Polar Coding
Information-theoretic channel coding scheme selected for 5G control channels (PDCCH, PUCCH, PBCH).
Technical Explanation
Invented by Erdal Arikan, Polar codes are the first provably capacity-achieving codes with low complexity. 3GPP adopted CRC-Aided Successive Cancellation List (CA-SCL) decoding of Polar codes for all physical control channels, delivering outstanding block error rate performance for small to medium payload sizes (tens to hundreds of bits).
Key Functions
- Guarantees capacity-achieving performance for short and medium control packets
- Selected exclusively for PDCCH, PUCCH Format 2/3/4, and PBCH
- Decoded using CRC-Aided Successive Cancellation List (CA-SCL) algorithms
Specifications
3GPP TS 38.212
Interfaces
Uu
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