谁能给俺概括一下zadoff-chu序列？

恩，希望牛人来总结一下

序列的特点大概是这样的：自相关是理想的，除了主瓣之外其余为0，互相关在一定范围内为0。 LTE里用这种序列的另一个好处是这种序列的模是常数，峰均比比较小。 粘来滴。。。

很好的自相关特性，互相关特性（取决于那个因子是不是互质），很好的抗频偏能力~

A Zadoff–Chu sequence is a complex-valued mathematical sequence which, when applied to radio signals, gives rise to an electromagnetic signal of constant amplitude, whereby cyclically shifted versions of the sequence imposed on a signal result in zero correlation with one another at the receiver. A generated Zadoff–Chu sequence that has not been shifted is known as a "root sequence". These sequences exhibits the useful property that cyclically shifted versions of itself are orthogonal to one another, provided, that is, that each cyclic shift, when viewed within the time domain of the signal, is greater than the combined propagation delay and multi-path delay-spread of that signal between the transmitter and receiver.