[1] Hua Jingyu, You Xiaohu,. Doppler shift estimation methodsin mobile communication systems [J]. Journal of Southeast University (English Edition), 2004, 20 (4): 405-411. [doi:10.3969/j.issn.1003-7985.2004.04.003]
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Doppler shift estimation methodsin mobile communication systems(
)
移动通信中的多谱勒频偏估计方法
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 20
- Issue:
- 2004 4
- Page:
- 405-411
- Research Field:
- Information and Communication Engineering
- Publishing date:
- 2004-12-30
Info
- Title:
- Doppler shift estimation methodsin mobile communication systems
- 移动通信中的多谱勒频偏估计方法
- Author(s):
- Hua Jingyu; You Xiaohu
- National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
- PACS:
- TN929.533
- DOI:
- 10.3969/j.issn.1003-7985.2004.04.003
- Abstract:
- Several Doppler shift estimators, including mean logarithm envelope difference(MLED)method, auto-correlation function(ACF)method, zero crossing rate(ZCR)method and mean square phase difference(MSPD)method are discussed and compared. The estimation principle and theoretical estimation bias of these estimators under Rayleigh fading channels are analyzed; furthermore, the Cramer Rao bound(CRB)of Doppler shift estimation is deduced, and a novel modification method based on two-dimensional polynomial fitting is proposed to reduce the Doppler shift estimation bias. We verify our algorithms with the Monte Carlo computer simulation; simulation results show better variance performance of modified methods than those of the original methods. In addition, the applicable situations of these estimators are discussed.
- 针对几种多普勒频偏估计方法, 分别为对数包络法、自相关函数法、各阶电平通过率法和均方相位差分法, 在理论上分析了瑞利信道中它们的估计原理和估计偏差, 说明了这些估计方法各自的适用场合.同时推导了多普勒频偏估计器的CRB(Cramer Rao bound), 并且提出了一种新的利用二阶多项式拟合的修正方法以提高多普勒频偏估计精度.算法验证采用门特卡罗计算机仿真, 结果表明, 相对于原始估计方法, 拟合修正后的方法估计性能得到了较大的提高.
References:
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Memo
- Memo:
- Biographies: Hua Jingyu(1978—), male, graduate; You Xiaohu(corresponding author), male, doctor, professor, xhyu@seu.edu.cn.