This code is intended to provide a reference model for the standard and has been written with a focus on correctness, rather than on simulation speed. This code is also intended to provide a platform for research on enhancements to the New Radio polar code. This motivates the inclusion of the custom1_encoder and custom1_decoder, alongside encoders and decoders for the New Radio PBCH, PDCCH and PUCCH channels. In particular, custom1_encoder and custom1_decoder adapt the New Radio polar code for general purpose applications, enabling support for arbitrarily-high information block lengths A. By contrast, the longest block lengths supported in the New Radio PBCH, PDCCH and PUCCH channels are 32, 140 and 1706 bits, respectively.
