一种多普勒频偏估计方法及分析

Design and Analysis of a Scheme for the Doppler Shift Estimation

利用有效到达径上信道估计值包络的电平通过率,估计出时变多径信道的多普勒频偏,并分析了影响该频偏估计的几个系统参数,得到了合适的系统参数选取原则.同时在理论上分析了噪声环境下电平通过率的估计偏移,提出了修正方法,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.

The Doppler-shift of the time-varying multi-path channel can be estimated by calculating the level crossing rate (LCR) of the signal envelope of the channel coefficient estimates on the effective fingers. Also some parameters relating to the Doppler shift are analyzed, and an improved estimation method to get the high estimation accuracy in all kinds of velocity and signal-to-noise ratio is raised.