【摘要】 移动通信基站端为了更有效地进行模式切换,需要测量一些物理量,例如信号与干扰加噪声比(Signal to interference plus noise ratio,SINR)、用户的移动速度等。本文利用上行正交频分复用(Orthogonal frequency division multiplexing,OFDM)系统中的解调参考信号(De-modulation reference signal,DMRS)频域信道信息,在计算自相关系数时引入修正因子和限制因子,有效地减小了噪声影响,并且使自相关系数计算公式适用于有或无直射径的不同信道条件。在不同信道模型和信噪比(Signal to noise ratio,SNR)下进行的仿真结果表明,本文方法可以稳定、准确地估计终端移动速度。更多还原

【Abstract】 It needs to use some physical layer measurement,such as signal to interference plus noise ratio(SINR),the user’s mobile speed,etc.The de-modulation reference signal(DMRS)uplink channel information is used in orthogonal frequency division multiplexing(OFDM)system.The limit factor and modify factor can be used to reduce the influence of noise.And the calculating formula of auto correlation function(ACF)can be applied to different channel condition such as direct path or not.Simulation is carried out in different channel models and signal-to-noise ratio.Simulation results demonstrate that the proposed method can estimate the terminal moving speed stably and accurately.更多还原