基于导频和多项式模型的信道估计

Channel Estimation Based on Pilot and Polynomial Model

本文提出一种基于导频辅助、多项式近似和信号重建的信道估计通用方法 ,适用于高速移动环境 .假定无线信道响应具有多项式特性 ,用两个或多个时隙的导频符号 ,估计出该时间段内任意符号时刻上的信道响应值 .用仿真方法研究了WCDMA上行链路性能与移动台速度的关系、最佳多项式阶数和最佳时隙数 。

A method based on assisted pilot and polynomial model is proposed for high speed mobile environment.Radio channel response at any time instant is estimated from the received pilots of two or more time slots,assuming that channel response can be modeled as a polynomial.For WCDMA (Wideband Code Division Multiple Access) uplink,the relation between the link performance and the mobile speed are studied by simulation.The optimal polynomial order and the optimal number of time slots are also investigated.Performance comparison between the proposed method and the WMSA (weighted multi slot average) method is made from the simulation results.