移动通信中一种精确的多普勒频移估计方法  

An Accurate Scheme for the Doppler Shift Estimation in Mobile Communication Systems

作　　者：华惊宇[1] 马章勇[1] 王东明[1] 尤肖虎[1] 

机构地区：[1]东南大学移动通信国家重点实验室,南京210096

出　　处：《电子与信息学报》2005年第1期95-98,共4页Journal of Electronics & Information Technology

基　　金：863(2001AA123015)资助项目

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.

关 键 词：多普勒频移 信道估计 电平通过率 

分 类 号：TM929.5[电气工程—电力电子与电力传动]