In mathematics, a polyphase sequence is a sequence whose terms are complex roots of unity:

${\displaystyle a_{n}=e^{i{\frac {2\pi }{q}}x_{n}}\,}$

where x_n is an integer.

Polyphase sequences are an important class of sequences and play important roles in synchronizing sequence design.

• Zadoff–Chu sequence

• Fan, Pingzhi; Darnell, Michael (1996). Sequence Design for Communications Applications. Research Studies Press. ISBN  047196557X.