物联网学报2023，Vol.7Issue(4)：28-38,11.DOI:10.11959/j.issn.2096-3750.2023.00351
超大规模MIMO-OTFS系统上行辅助的下行信道估计方法
Uplink assisted downlink channel estimation method of extra-large scale MIMO-OTFS system
摘要
Abstract
A low complexity downlink channel estimation method for high-speed mobile scenarios was proposed for the extra-large scale multiple-input multiple-output(MIMO)orthogonal time-frequency space(OTFS)system.Different from the existing studies,the proposed method considers the significant spatial non-stationary characteristics of ex-tra-large scale MIMO-OTFS system.Based on the visible path region,an enhanced sparse orthogonal matching pursuit(OMP)algorithm with low complexity was proposed,uplink-assisted downlink channel estimation was achieved using the mapping relationship between the uplink and downlink channels in the frequency-division duplex(FDD)mode.Sim-ulation results show that the proposed uplink-assisted downlink channel estimation method can accurately represent the non-stationary of the system,and achieve significant improvement in the channel estimation performance while reducing the computational complexity,and still perform well in high-mobility IoT scenarios.关键词
物联网/正交时频空间调制/超大规模多输入多输出/频分双工/信道估计Key words
IoT/orthogonal time frequency space modulation/extra-large scale MIMO/frequency division duplex/channel estimation分类
信息技术与安全科学引用本文复制引用
蒲旭敏,邓凯元,陈前斌..超大规模MIMO-OTFS系统上行辅助的下行信道估计方法[J].物联网学报,2023,7(4):28-38,11.基金项目
国家自然科学基金资助项目(No.61701062) （No.61701062）
中国博士后科学基金资助项目(No.2019M651649) （No.2019M651649）
江苏省博士后科研基金资助项目(No.2018K041c) （No.2018K041c）
重庆市教育委员会科学技术研究项目(No.KJQN202100649,No.KJQN202000612)The National Natural Science Foundation of China(No.61701062),The China Postdoctoral Science Foundation(No.2019M651649),The Jiangsu Planned Projects for Postdoctoral Research Funds(No.2018K041c),The Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJQN202100649,No.KJQN202000612) （No.KJQN202100649,No.KJQN202000612）
