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在长期演进(LTE)系统中,为了工程上的简单实现,同时也为充分利用相邻参考信号的信息来精确估计数据子载波处的信道响应,提出了一种自适应矩阵样条内插的插值估计方法.根据样条插值的数学理论推导出适用于下行物理信道的矩阵样条内插公式,通过将插值区间进行分解与叠加来优化提出的插值算法,并利用相关带宽来自适应地选择分解长度.仿真结果表明,在较低工程实现复杂度的条件下,提出的内插算法性能优于常用的多项式内插算法,而且能够动态跟踪信道的状态变化.
In the long term evolution (LTE) system, for the sake of simple implementation in engineering, and to make full use of the information of adjacent reference signals to accurately estimate the channel response at data subcarriers, an adaptive matrix spline interpolation According to the mathematical theory of spline interpolation, the matrix spline interpolation formula suitable for downlink physical channel is deduced, the interpolation algorithm is optimized by decomposing and superposing the interpolation interval, and adaptively selecting the decomposition according to the relevant bandwidth Length.The simulation results show that the proposed interpolation algorithm outperforms the commonly used polynomial interpolation algorithm under the conditions of lower engineering complexity and can dynamically track the channel state changes.