中文说明：这是一个MATLAB代码生成LTE PRACH（物理随机接入信道）序言，这实际上是一个Zadoff-Chu序列。此代码是唯一的FDD模式前导码生成，因为PRACH格式0。
English Description：
this is a matlab code to generate the LTE PRACH (physical random access channel) preamble, which is actually a Zadoff Chu sequence. This code caters only FDD mode preamble generation, and that too for prach format 0.