Research And Implement Of PUCCH In 5G NR Physical Layer

With the rapid growth of the number of mobile users and the rapid development of communication technology,the 5th Generation Mobile Communication(5G)system has emerged.The Physical Uplink Control Channel(PUCCH)which carries Uplink Control Information(UCI)is an important part of 5G system.Based on the "5G baseband signal demodulation and decoding equipment" project,this thesis designs and implements the PUCCH transmitter link and receiver link by studying 5G physical layer protocol.The main work and innovations of the thesis are as follows:1.Through in-depth study of the 3rd Generation Partnership Project(3GPP)Rel-15 physical layer protocol,this thesis designs the transmitter link of PUCCH of 5G New Radio(NR).At the same time,combining the related information of the 4th Generation Mobile Communication(4G)system,this thesis designs the PUCCH receiver link of the five formats in the sender of 5G system,and simulates and verifies the designed link.2.Aiming at the problem of the high complexity of the polarization code serial elimination list bit-Flip(SCLF)decoding algorithm,this thesis proposes a Gaussian approximation optimized Successive Cancellation List bit-Flip(G-SCLF)decoding algorithm.The algorithm uses the method of Gaussian approximation estimation to optimize the flip index set of the SCLF decoding algorithm,deletes the index number with high channel reliability in the flip index set,reduces the number of flips of the SCLF decoding algorithm,and reduces the complexity degree.When the Signal Noise Ratio(SNR)is 2d B,the G-SCLF decoding algorithm newly proposed reduces the complexity by about 12.9% compared to the SCLF decoding algorithm with almost no performance loss.3.According to the design content,this thesis implements the transmitter link and the receiver link in five formats of PUCCH on the Digital Signal Processor(DSP).For the module of channel decoding in the sender,this thesis implements and tests the G-SCLF decoding algorithm newly proposed in the environment of PUCCH link.In order to balance the performance and complexity of the decoding module,the CA-SCL decoding algorithm and the G-SCLF decoding algorithm are used for low SNR and high SNR respectively.Compared with the traditional decoding module,the performance of the new decoding module is increased by about 0.13 d B at high SNR under the premise of almost no increase in complexity,which meets the needs of the project.