Constant amplitude zero autocorrelation (CAZAC) sequences have modulus one and ideal periodic autocorrelation function. Such sequences are used in cellular radio communications systems, e.g., for reference signals, synchronization signals and random access preambles. We propose a new family CAZAC sequences, which is constructed by interleaving a Zadoff-Chu sequence by a quadratic permutation polynomial (QPP), or by a permutation polynomial whose inverse is a QPP. It is demonstrated that a set of orthogonal interleaved Zadoff-Chu sequences can be constructed by proper choice of QPPs.

翻译：恒包络零自相关（CAZAC）序列具有单位模值和理想的周期自相关函数，此类序列广泛应用于蜂窝无线电通信系统，例如用于参考信号、同步信号和随机接入前导码。我们提出了一类新型CAZAC序列，该类序列通过二次置换多项式（QPP）或逆映射为QPP的置换多项式对Zadoff-Chu序列进行交织而构建。研究表明，通过合理选择QPP可构造出一组正交交织的Zadoff-Chu序列。