附加边缘固定导频的动态导频方案设计  

Design of Dynamic Pilot Scheme with Additional Edge Fixed Pilot

作　　者：钱博[1] 刘彤[1] QIAN Bo;LIU Tong(Shenyang Ligong University,Shenyang Liaoning 110158,China)

机构地区：[1]沈阳理工大学,辽宁沈阳110158

出　　处：《计算机仿真》2025年第1期202-205,456,共5页Computer Simulation

基　　金：国家自然基金项目(61971291);辽宁省教育厅科学研究项目(LJKZ0242)。

摘　　要：针对自适应导频结构存在边缘数据载波远离导频,影响插值结果准确性的问题,提出了一种附加边缘固定导频的动态导频方案。在导频密度等间隔变换算法基础上,通过在边缘载波位置附加固定导频,对非边缘导频制定动态导频策略,提高信道估计精度,降低误码性能。仿真结果表明,所提出的附加边缘固定导频的动态导频方案相比于采用等间隔自适应的导频方案,导频适应速度更快,且在采用linear插值算法下误码率降低效果明显,在信噪比为14dB,导频数量为12时,采用LS信道估计算法,误码率降低1.7dB,采用LMMSE信道估计算法,误码率降低2.4dB。A dynamic pilot scheme with additional edge fixed pilots is proposed to address the issue of edge data carriers being far away from the pilot in the adaptive pilot structure,which affects the accuracy of interpolation results.On the basis of the pilot density equal interval transformation algorithm,fixed pilots were added at the edge positions.Dynamic strategy was developed for non edge pilots.The accuracy of channel estimation was improved and bit error rate was reduced.The results of simulation show that the dynamic pilot scheme with additional edge fixed pilots is better than the equally spaced adaptive pilot scheme.The speed of pilot adaptation is faster.The bit error rate was reduced significant base of the linear interpolation algorithm.When the signal-to-noise ratio is 14dB and the number of pilots is 12,the bit error rate is reduced 1.7dB with the LS channel estimation algorithm,while the bit error rate is reduced 2.4dB with the LMMSE channel estimation algorithm.

关 键 词：边缘固定导频 动态导频 信道估计 

分 类 号：TN802[电子电信—信息与通信工程]