Symbol Timing Synchronization Using Interpolated Matched-Filters

刘祖军; 王杰令; 易克初

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Symbol Timing Synchronization Using Interpolated Matched-Filters

更新时间：2025-12-08

- Symbol Timing Synchronization Using Interpolated Matched-Filters
- Vol. 42, Issue 12, Pages: 1550-1554(2008)
- 作者机构：
  
  西安电子科技大学综合业务网理论与关键技术国家重点实验室,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911;TN914.3
- Online First：10 December 2008，
  
  Published：2008
- 稿件说明：
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刘祖军, 王杰令, 易克初. Symbol Timing Synchronization Using Interpolated Matched-Filters[J]. 2008, 42(12): 1550-1554.
DOI：

刘祖军, 王杰令, 易克初. Symbol Timing Synchronization Using Interpolated Matched-Filters[J]. 2008, 42(12): 1550-1554. DOI：

摘要

针对多项滤波器组符号定时同步方法复杂度高的问题

提出一种基于匹配滤波器插值的符号定时同步方法.该方法根据定时误差调整插值步长

通过不同的插值步长对预设的匹配滤波器脉冲响应进行插值

调整匹配滤波器的群延时

从而实现符号的定时同步.与传统的多相滤波器组方法相比

该方法复杂度低

易于实现高精度符号定时同步.采用匹配滤波器插值构建了同步环路

并以每符号2采样值的采样速率进行了环路仿真

结果表明该方法比复杂度相当的多相滤波器组方法在误码率为10

-3

时信噪比提高约1 dB

能够以更低的复杂度实现高精度符号定时同步.

Abstract

To overcome the high complexity of the symbol timing synchronization method using polyphase filterbank

a symbol timing synchronization method based on interpolated matched filters is proposed. In the proposed method

the interpolation step is adjusted according to timing errors

and is used to interpolate the discrete pulse response of the preinstalled matched-filter

so that the group delay of matched-filter is adjusted to achieve symbol timing synchronization. The proposed method has less complexity and provides precise symbol timing synchronization more easily than the polyphase filterbank method has. The synchronization loop with the interpolated matched-filters has been simulated at 2 samples per symbol. The simulation results show that the proposed method brings performance improvement of approximately 1 dB in signal to noise ratio(SNR)compared to the polyphase filterbank method at equivalent complexity when bit error r

atio is 10

-3

and can provide precise symbol timing synchronization with less complexity.

关键词

Keywords

references

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DRIESSEN P F. DPLL bit synchronizer with rapid acquisition using adaptive Kalman filtering techniques[J]. IEEE Transactions on Communications, 1994, 42(9): 2673-2675.

ZHU Weiping, YAN Yupeng, AHMAD M O, et al. Feedforward symbol timing recovery technique using two samples per symbol [J]. IEEE Transactions on Circuits and Systems I, 2005, 52(11):2490-2500.

CANDAN C. An efficient filtering structure for Lagrange interpolation [J]. IEEE Signal Processing Letters, 2007, 14(1):17-19.

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