针对时变瑞利信道给出一种用于LTE系统中的多普勒频偏估计方法。基于OFDM符号固有的循环前缀,利用相位的变化,可以较快较准确地估计多普勒频移。另外,还提出相位估计长度概念,并得到一种减小误差的误差修正方法,使得算法估计更准确,处理复杂度更低。
In this paper,an algorithm is proposed to estimate the Doppler shift in time-varying Rayleigh channels for LTE system. It is simply implemented with the phase variation based on the cyclic prefix of OFDM symbols. In addition, a new concept of phase estimation length is defined, and an error correcting modified method is proposed. And thus, the estimation precision is improved and the implementation complexity is reduced.