散射信道下OFDM/OQAM离散导频迭代信道估计算法  

ITERATIVE SCATTERED PILOT CHANNEL ESTIMATION IN OFDM/OQAM BASE ON TROPOSCATTER CHANNEL

作　　者：尹爱兵 李毅 YIN Ai-bing;LI Yi(School of Electronic Engineering,Anhui Wenda University of Information Engineering,Hefei 231201,China)

机构地区：[1]安徽文达信息工程学院电子工程学院,安徽合肥231201

出　　处：《南阳理工学院学报》2023年第4期56-60,共5页Journal of Nanyang Institute of Technology

基　　金：安徽省教育厅高校科学研究重点项目(KJ2019A0906);安徽省质量工程项目(2020jyxm0651);安徽文达信息工程学院自然科学基金重点项目(XZR2021A12)。

摘　　要：针对散射信道下OFDM/OQAM(正交频分复用/交错正交幅度调制Orthogonal Frequency Division Multiplexing/offset quadrature amplitude modulation)信道估计问题,提出一种对离散导频虚部干扰进行分层处理的迭代信道估计算法。该算法对导频一阶邻域的虚部干扰在发送端进行对称抵消,高阶邻域干扰在接收端通过解码进行反馈估计,再将导频分量与虚部干扰进行多次联合信道精估计。理论分析与仿真表明,与已有的离散导频法相比,通过迭代,虽然增加了解调复杂度,但提高了系统性能。Aiming at the problem of OFDM/OQAM channel estimation in scattering channel,an iterative channel estimation algorithm based on discrete pilot is proposed.At the transmitting end,the imaginary part interference in the first-order domain of pilot is symmetrically offset by interference.At the receiving end,the discrete pilot channel is estimated roughly,the transmission information is decoded and recovered,and then the pilot component and imaginary part interference are estimated accurately.Through iteration,the system performance is improved.Theoretical analysis and simulation show that compared with the existing discrete pilot method,this method increases the demodulation complexity,but improves the system performance.

关 键 词：OFDM/OQAM 散射信道 信道估计 

分 类 号：TN914.3[电子电信—通信与信息系统]