Before revision:  To satisfy the usage rules of Occupied Channel Bandwidth (OCB) of unlicensed spectrum, NR-U's PRACH and PUCCH , which are composed of CAZAC sequences, have to use some sequence repetition mechanisms in frequency domain , which brings more serious CM problems.
After revision:  To satisfy the usage rules of Occupied Channel Bandwidth (OCB) of unlicensed spectrum, NR-U's PRACH and PUCCH have to use some sequence repetition mechanisms in frequency domain , which brings more serious CM problems.