摘要
该文利用有效到达径上信道参数的估计值,统计其包络的电平通过率(Level Crossing Rate,LCR),据此估计出时变多径信道的多普勒频移。同时还在理论上分析了噪声环境下LCR方法的估计偏差,进而提出了精确的改进方法,使得通信系统在各种移动速度和信噪比下都具有较高的估计精度。
In this paper, the Doppler-shift of the time-varying multi-path channel is estimated by calculating the Level Crossing Rate (LCR) of the signal envelope of the channel coefficient estimates on the effective fingers. The effect of noise is analyzed , and an improved accurate estimation method is proposed to get the high estimation accuracy in all kinds of velocity and signal-to-noise ratio.
出处
《电子与信息学报》
EI
CSCD
北大核心
2005年第1期95-98,共4页
Journal of Electronics & Information Technology
基金
863(2001AA123015)资助项目
关键词
多普勒频移
信道估计
电平通过率
Doppler-shift, Channel estimation, Level Crossing Rate(LCR)
