preamble sequence

Generation of preamble sequence in LTE uplink random access based on high-speed mobile environment

基于高速移动环境的LTE上行随机接入前导序列的生成

The paper proposes an improved double sliding window algorithm to detect burst signal based on the feature of preamble sequence .

在双滑动窗口算法实现突发通信信号检测的基础上，利用前导码的特征对该算法进行改进。

Secondly , the paper analyzes how does synchronization error influence OFDM system , and bring forward combined time and frequency synchronization algorithm based on cyclic prefix , pilot symbol and preamble sequence techniques . In addition , an improved algorithm is introduced .

接着分析了同步误差对系统的影响。详细介绍了基于循环前缀、导频符号和训练序列的OFDM系统符号定时和载波频率联合同步算法，并提出了改进算法。

Coherent demodulation is usually adopted in orthogonal frequency division multiplexing ( OFDM ) system to achieve better performance . It means accurate synchronization are needed . However , traditional preamble training sequence decrease substantially bandwidth utilization .

相干解调经常应用于正交载波频分复用（OFDM）系统以达到更好的传输性能，但同时要求进行准确地同步。尽管如此，传统的添加前导训练序列的方法大幅地增加了对带宽的占用。

The preamble is a sequence of bytes that identifies the beginning of a frame .

前同步信号是一个字节序列，它是帧起始部分的识别标志。