Polar codes are proven as the first codes to achieve the limit of channel capacity and have been adopted in 5G. Due to their construction characteristics and performance, they are expected to be utilized for flexible scenarios in 6G. For a given length of information, various code rates can be achieved by changing the number of frozen bits and by puncturing techniques. However, the arbitrary code rate is limited due to the core matrix, and the decoding performance is degraded resulting from the puncturing techniques. In order to improve the performance, this paper proposes a novel puncturing pattern selection scheme using an additional encoding process based on feedback values at the transmitter. The proposed scheme guarantees the punctured codeword bits to be definitely known by the receiver. As a consequence, the log-likelihood ratio (LLR) of the punctured codeword bits can be accordingly set to infinity at the decoder, resulting in the performance improvement. Simulation results demonstrate that the proposed puncturing scheme outperforms the existing schemes with a slightly increased complexity.

极性码已被证明是达到信道容量极限的第一个码，并已在5G中采用。由于其结构特点和性能，它们有望用于6G的灵活方案。对于给定的信息长度，可以通过更改冻结位的数量和打孔技术来实现各种编码率。然而，由于核心矩阵，任意码率受到限制，并且由于打孔技术而导致解码性能下降。为了提高性能，本文提出了一种新颖的删截模式选择方案，该方案使用了基于发射机反馈值的附加编码过程。所提出的方案保证了被打孔的码字比特被接收机明确地知道。作为结果，因此，可以在解码器处将打孔码字比特的对数似然比（LLR）设置为无穷大，从而提高性能。仿真结果表明，提出的删余方案在性能上略有提高，优于现有方案。