Design and performance of the random access preamble structure for LTE-A super long-range coverage
Design and performance of the random access preamble structure for LTE-A super long-range coverage
复制标题
LTE-A超长距离覆盖随机接入前导结构设计与性能
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Liu, Naian
中科院分区：
文献类型：
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作者：
Li, Xiaohui;Wei, Longfei;Hei, Yongqiang;Liu, Naian
针对eNodeB与终端之间由于距离远、时延高而导致上行链路不同步的问题，提出了一种随机接入前导结构，实现了LTE-A的长期超覆盖。随机存取序结构是由两个不同的级联Zadoff-Chu根序列加上扩展的循环前缀和保护时间组成的新的序序列。在此基础上，推导了该系统的周期自相关和互相关，并对其覆盖性能进行了分析。理论分析和仿真结果表明，该前导的自相关性只有在时延为零时才会达到峰值，并且该前导的覆盖范围大大提高。
Aiming at the uplink out-of-synchronization problem due to the long distance and the high delay between the eNodeB and the UE,a random access preamble structure is presented for the long term evolution-advanced(LTE-A)super coverage.The random access preamble structure is a new preamble sequence constructed by two different cascading Zadoff-Chu root sequences followed by the expanded cyclic prefix and guard time.Furthermore,the period auto-correlation and cross-correlation of the proposed preamble is derived and the coverage performance is analyzed.Theoretical analysis and simulation results show that the auto-correlation of the proposed preamble reaches its peak only when the delay is zero,and the coverage range is greatly improved by using the proposed preamble.