通信学报2025，Vol.46Issue(12)：57-68,12.DOI:10.11959/j.issn.1000-436x.2025254
面向OFDM的模拟阵列全双工自干扰信道估计
Self-interference channel estimation for OFDM-based full-duplex analog arrays
摘要
Abstract
To address the reliance of existing full-duplex analog array systems on dedicated time slots and external equip-ment for self-interference channel state information acquisition,a reference signal-assisted self-interferencechannel esti-mation method was proposed.Specific beamforming matrices were designed to enable the estimation of the self-interference channel concurrently with normal data transmission,thereby eliminating the need for additional measure-ment devices or centralized measurement intervals.The impact of transmit and receive signal-to-noise ratios on the nor-malized mean square error of channel estimation was theoretically analyzed,clarifying the trade-off between transmit power,receive gain,and estimation accuracy.Hardware-in-the-loop simulations demonstrate that the method achieves ex-cellent performance in small-scale array systems,while in large-scale arrays,estimation error can be effectively miti-gated by increasing the transmit Signal-to-noise ratio(SNR).The findings indicate that channel estimation error is more sensitive to transmit SNR,and increasing transmit SNR represents an effective approach to error reduction,though this comes at the cost of a trade-off with normalized mean squared error(NMSE)performance.关键词
模拟阵列/全双工/波束成形/自干扰抑制Key words
analog array/full duplex/beamforming/self-interference cancellation分类
信息技术与安全科学引用本文复制引用
林朗,唐文强,赵宏志,潘文生,邵士海,唐友喜..面向OFDM的模拟阵列全双工自干扰信道估计[J].通信学报,2025,46(12):57-68,12.基金项目
国家自然科学基金资助项目(No.62471111,No.62071094)The National Natural Science Foundation of China(No.62471111,No.62071094) （No.62471111,No.62071094）
