5G NR

Figure 4.76 Example illustration of NR SRS structure in time and frequency domains [6].

The sequences used to represent a set of SRS are based on Zadoff–Chu sequences.¹⁹

Although Zadoff–Chu sequences of prime length are preferred in order to maximize the number of available sequences, the SRS sequences are not of prime length. The SRS sequences are extended Zadoff–Chu sequences based on the longest prime-length Zadoff–Chu sequence with a length $N$ less than or equal to the desired SRS sequence length. The sequence is then cyclically extended ...