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两种插值信道估计方法的比较
  • 期刊名称：电子与信息学报,v 28, n 12, December, 2006, p 2339-2342
  • 时间：0
  • 分类：TN914.53[电子电信—通信与信息系统;电子电信—信息与通信工程]
  • 作者机构：[1]北京邮电大学信息工程学院,北京100876, [2]江南大学通信与控制工程学院,无锡214122
  • 相关基金：国家自然科学基金（69931050）资助课题
  • 相关项目：未来移动通信系统中高频谱效率的理论研究
关键词： CDMA, 信道估计, CHEBYSHEV多项式, 插值, 递归, CDMA, Channel estimation, Chebyshev polynomial, Interpolation, Regression
中文摘要：

在瑞利衰落信道中，使用时分复用的导频信号辅助的信道估计方案时，提出了在使用极大似然方法估计出导频符号的信道参数之后，再利用一个时隙上所有导频符号的Chebyshev多项式的数学插值估计数据符号信道参数的方法。同时比较了分段线性插值加递归的信道估计方法。仿真结果表明，使用Chebyshev多项式的数学插值估计信道参数的方法比使用线性插值加线性递归的信道估计方法能更好的改善系统的性能。

英文摘要：

The pilot-assisted channel estimation method is studied in time-division multiplexing Rayleigh fading channel. A channel tracking method is proposed by using the Chebyshev interpolation polynomials after the channel coefficients of＂ pilot symbols in a time-slot being estimated employing ML estimation. It is compared with the segment linear interpolation method with regression. The simulation results show that the method can track the fading channel accurately. By using the proposed estimation method, the system＇s BER performance can be improved distinctly.

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