摘要
推导出了第三代合作伙伴计划(3GPP)长期演进系统(Long Term Evolution,LTE)中时域和频域自相关移动速度估计算法,并根据LTE系统特性给出了一种新的估计算法——联合的移动速度估计算法。利用归一化接收功率标准差粗估计移动速度,并根据该粗估计值选择频域或者时域的自相关估计算法获得精确的速度估计值。仿真结果表明,联合估计算法相比较于使用单一的自相关法进行估计,估计出的速度值与理论值吻合得更好,有较好的估计精度。
In this paper,the time domain and frequency domain auto-correlation estimation in LTE system are given firstly and then a joint velocity Estimation algorithm is proposed for LTE system.The normalized standard deviation of received power is used to get the rough value of velocity at first and then based on it,the time domain or frequency domain auto-correlation estimation is selected to obtain the precise velocity.The simulation results show that this method has a better estimation accuracy compared with the single auto-correlation estimation above.
出处
《无线电工程》
2011年第9期1-3,14,共4页
Radio Engineering
基金
国家科技重大专项课题"TD-LTE面向商用系统设备研发"(2010ZX03002-003-001)资助
关键词
LTE系统
移动速度估计
自相关
时—频域
LTE system
terminal velocity estimation
auto-correlation
domain-frequency domain
