An Improved Algorithm for TD-LTE Downlink Time Synchronization

Wenle Bai; Xu Wang; Yongmei Zhang; Mugen Peng

doi:10.11959/j.issn.1000-0801.2015030

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An Improved Algorithm for TD-LTE Downlink Time Synchronization

research and development | 更新时间：2024-06-05

- An Improved Algorithm for TD-LTE Downlink Time Synchronization
- Telecommunications Science Vol. 31, Issue 1, Pages: 72-76(2015)
- 作者机构：
  
  1. 北方工业大学信息工程学院北京 100144
  2. 北京邮电大学信息与通信工程学院北京 100876
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2015030
  CLC：
- Published Online：2015-01，
  
  Published：20 January 2015
- 稿件说明：
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Wenle Bai, Xu Wang, Yongmei Zhang, et al. An Improved Algorithm for TD-LTE Downlink Time Synchronization[J]. Telecommunications science, 2015, 31(1): 72-76.
DOI：

Wenle Bai, Xu Wang, Yongmei Zhang, et al. An Improved Algorithm for TD-LTE Downlink Time Synchronization[J]. Telecommunications science, 2015, 31(1): 72-76. DOI： 10.11959/j.issn.1000-0801.2015030.

摘要

针对正交频分复用定时同步实际应用问题，利用循环前缀的统计能量差和统计相关特性，提出了一种改进的TD-LTE下行定时同步算法，减小了计算复杂度，同时能检测循环前缀类型。仿真结果表明，算法在多径衰落信道下，特别是小信噪比条件下，定时同步性能优越，并对归一化频偏和多普勒频移变化具有较强的适应能力。

Abstract

Aimed at the application problem of timing synchronization algorithm in orthogonal frequency division multiplexing system

an improved algorithm for TD-LTE downlink time synchronization was proposed. It utilizes statistical energy difference and correlation of cyclic prefix to improve the system performance

which reduces the computational complexity

and can detect the cyclic prefix types. The simulation results demonstrate that the performance of the new method is excellent in multi-path fading channels

especially in the case of small SNR. And it is robust against the normalized frequency offset and Doppler shift.

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references

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