  A flexible incremental redundancy hybrid auto- mated repeat request (IR-HARQ)
scheme for polar codes is proposed based on dynamically frozen bits and the
quasi-uniform puncturing (QUP) algorithm. The length of each transmission is
not restricted to a power of two. It is applicable for the binary input
additive white Gaussian noise (biAWGN) channel as well as higher-order
modulation. Simulation results show that this scheme has similar performance as
directly designed polar codes with QUP and outperforms LTE-turbo and 5G-LDPC
codes with IR-HARQ.
