Before revision:  Based on the characteristics of Constant Amplitude Zero Auto-correlation(CAZAC) sequences  , which are used for PRACH and PUCCH (refer to PUCCH format 1 and format ) in 5G , this paper proposes new mechanisms of CM reduction for PRACH and PUCCH with the repeated sequence in frequency domain considering the design principles to ensure the sequence performance of the auto-correlation and cross-correlation for CAZAC sequence-based PRACH and PUCCH .
After revision:  Based on the characteristics of Constant Amplitude Zero Auto-correlation(CAZAC) sequences , which are used for PRACH and PUCCH (refer to PUCCH format 1 and format ) in 5G , this paper proposes new mechanisms of CM reduction for these two types of channels considering the design principles to ensure the sequence performance of the auto-correlation and cross-correlation for CAZAC sequence-based PRACH and PUCCH .