[1]盛彬,尤肖虎.WCDMA中自适应信道估计器的研究[J].东南大学学报(自然科学版),2003,33(3):249-252.[doi:10.3969/j.issn.1001-0505.2003.03.001]
 Sheng Bin,You Xiaohu.Study on adaptive filter for channel estimation in WCDMA downlink[J].Journal of Southeast University (Natural Science Edition),2003,33(3):249-252.[doi:10.3969/j.issn.1001-0505.2003.03.001]
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WCDMA中自适应信道估计器的研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
33
期数:
2003年第3期
页码:
249-252
栏目:
信息与通信工程
出版日期:
2003-05-20

文章信息/Info

Title:
Study on adaptive filter for channel estimation in WCDMA downlink
作者:
盛彬 尤肖虎
东南大学移动通信国家重点实验室,南京 210096
Author(s):
Sheng Bin You Xiaohu
National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
关键词:
宽带码分多址 信道估计 自适应滤波器
Keywords:
WCDMA channel estimation adaptive filter
分类号:
TN929.533
DOI:
10.3969/j.issn.1001-0505.2003.03.001
摘要:
针对WCDMA系统的信道估计器提出了一种新的自适应算法,它的权系数通过瞬时信道估计的自相关函数来自适应更新,从而改变估计器带宽以适应信道时变的多普勒谱.在平坦瑞利衰落信道中的计算机仿真表明,该方法在第3代移动通信标准支持的多普勒频率范围内获得了良好的性能,并且估计的均方误差接近滑动平均滤波器在最佳平均长度下的最小均方误差.
Abstract:
An adaptive channel estimation filter for WCDMA downlink is presented. The filter coefficients are updated based on the measured autocorrelation function of the instantaneous channel estimate so that the bandwidth of the filter can adjust to changes in the Doppler spectrum of time-varying fading channel. The mean square error performance under flat Rayleigh fading channel is evaluated by computer simulation and the results demonstrate that the proposed adaptive channel estimation filter provides good performance which approaches the results of moving-average filter under optimal averaging length, over wide Doppler frequency range supported by 3G.

参考文献/References:

[1] Chaufray J,Loubaton P,Chevalier P.Consistant estimation of rayleigh fading channel second-order statistics in the context of the wideband CDMA mode of the UMTS[J].IEEE Trans Signal Processing,2001,49:3055-3064.
[2] Li H,Cavers J K.An adaptive filtering technique for pilot-aided transmission systems[J].IEEE Trans Veh Technol,1991,40:532-545.
[3] Cavers J K.An analysis of pilot symbol assisted modulation for Rayleigh fading channels[J].IEEE Trans Veh Technol,1991,40:686-693.
[4] Aghamohammadi A,Meyr H,Ascheid G.Adaptive synchronization and channel parameter estimation using an extended Kalman filter[J].IEEE Trans Commun,1989,37:1212-1218.
[5] Jakes W C.Microwave Mobile Communications[M].New York:Wiley,1974.
[6] 3GPP.Physical Layer-General Description[EB/OL].http://ftp.3gpp.org/specs/2000-06/Ts25.213,2000-06/2002-09.
[7] Komulainen P,Haikola V.Adaptive filtering for fading channel estimation in WCDMA downlink[A].In:the 11th IEEE International Symposium on Personal,Indoor and Mobile Radio Communications[C].London,UK,2000,549-553.

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备注/Memo

备注/Memo:
基金项目: 江苏东大通信技术有限责任公司(SeuComm)资助项目.
作者简介: 盛彬(1974—),男,博士生; 尤肖虎(联系人),男,博士,教授,博士生导师,xhyu@seu.edu.cn.
更新日期/Last Update: 2003-05-20