宽带CDMA系统中的一种新的自适应信道估计方法

该文提出了采用实测的信道自相关系数作为权重的信道估计处理方法，并给出其误差性能的数学表达式，同时给出了经典的滑动平均信道估计方法的误差性能的数学表达式。理论分析及仿真结果表明所提的方法能自动适应移动信道的时变模型及衰落速率，具有有效地抑制噪声的优点；同时克服了滑动平均估计方法的估计长度对估计准确性影响较大的缺点，在移动速度固定及移动速度变化很大的环境下都具有稳定的误差性能；尤其在移动速度变化很大的环境下具有比滑动平均估计方法更低的估计方差，大大提高了RAKE接收机的性能。

A novel adaptive channel estimation scheme for wideband cdma systems

A channel estimation scheme, using measured autocorrelation coefficients as weighting coefficients of the channel processor, and its error performance in equation are presented in this paper. Error performance of moving averaging channel estimation in equation is provided as well. Numerical and simulation results show that the proposed scheme can trace channel accurately and adaptively and outperforms moving averaging methods under not only fixed but also variant vehicle speeds.