Research and Application of Cyclic Redundancy Check Assisted Polar Coding in Wireless Communication Control Channels

In this paper, a new polarity channel coding technology is selected for Gaussian channel disturbed by noise in the 5G new radio (NR) communication system, and an experimental model is constructed by using cyclic redundancy check assisted Polar(CA-Polar) coding, and the received signal is decoded by using successive cancellation list (SCL) algorithm. On this basis, the paper compares and analyzes the decoding performance and bit error rate (BER) of polar code under different modulation modes when transmitting downlink control information and uplink control information in 5G NR communication system channel. The simulation experiment results show that whether it is in the downlink control channel or the uplink control channel, when quadrature phase shift keying (QPSK) modulation is used, CA-Polar coding can fully meet the quality requirements of signaling information transmission in the 5G NR communication system. It can be seen that CA-Polar code combines the cyclic redundancy check and polarity coding to improve the reliability of the communication system.