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应用科学学报 ›› 2003, Vol. 21 ›› Issue (1): 49-52.

• 论文 • 上一篇    下一篇

一种信道估计平均长度动态调整的新方法

马章勇, 赵春明, 尤肖虎   

  1. 东南大学移动通信国家重点实验室 江苏 南京 210096
  • 收稿日期:2001-10-16 修回日期:2002-02-28 出版日期:2003-03-10 发布日期:2003-03-10
  • 作者简介:马章勇(1974-),男,江苏泰兴人,博士生;赵春明(1959-),男,江苏江都人,教授,博导;尤肖虎(1962-),男,江苏苏州人,教授,博导.
  • 基金资助:
    国家863资助项目(863-317-03-01-02-04-20/MII-C3G-02-04-002);东大通信技术公司资助项目

A New Scheme for Adjusting the Estimated Average Length of Channel

MA Zhang-yong, ZHAO Chun-ming, YOU Xiao-hu   

  1. National Mobile Communications Reaserch Lab, Southeast University, Nanjing 210096, China
  • Received:2001-10-16 Revised:2002-02-28 Online:2003-03-10 Published:2003-03-10

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109

被引次数

2

摘要： 提出了利用相干Rake接收机原理,估计出有效到达径的信道估计参数及其包络信号;统计有效到达径包络信号的电平通过率,并由此估计出信道的多普勒频偏.利用多普勒频偏与最优信道估计平均长度的关系,动态地调整信道估计平均长度,使整个相干接收机的性能在不同的移动速度下均能获得较好的估计性能.

关键词: 电平通过率, Rake接收机, 码分多址, 多普勒频偏

Abstract: The author proposes that the channel coefficient of the effective arriving path can be estimated with the Rake coherent receiver. By calculating the level cross rate (LCR) of the envelope, the Doppler-shift is estimated. The observation length is then adjusted dynamically with the help of the connection between the Doppler-shift and the optimal observation length, enabling the whole receiver to obtain better performance in variant velocities.

Key words: code division multiple access (CDMA), level crossing rate (LCR), the Rake receiver, Dopplershift

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