中图分类号：TN929.5；TM63 文献标志码：A DOI: 10.16157/j.issn.0258-7998.257718
中文引用格式： 马佰超，王庆泽，孙彬，等. 5G-A通感场景下无人机连续时延-多普勒信道参数的评估算法[J]. 电子技术应用，2026，52(3)：25-31.
英文引用格式： Ma Baichao，Wang Qingze，Sun Bin，et al. Evaluation algorithm for continuous time-delay-Doppler channel parameters of UAVs in 5G-A communication-sensing scenarios[J]. Application of Electronic Technique，2026，52(3)：25-31.

Evaluation algorithm for continuous time-delay-Doppler channel parameters of UAVs in 5G-A communication-sensing scenarios

Abstract： Aiming at the severe threat of unmanned aerial vehicle (UAV) “black flight” to the safe operation of substations, as well as the problems of low positioning accuracy, weak anti-interference ability and poor scene adaptability of traditional low-altitude protection technologies, this paper proposes a precise parameter estimation algorithm for low-altitude UAVs in power grids based on 5th Generation-Advanced (5G-A) integrated sensing and communication（ISAC）. First, a perception parameter system covering UAV motion characteristics and electromagnetic scattering characteristics is constructed, and a positioning environment reconstruction parameter system including interference signal power spectral density, multipath attenuation coefficient and signal occlusion rate is designed. Environmental adaptation is realized through the process of "parameter collection - model correction - error compensation". Finally, a two-stage continuous time-delay-Doppler channel parameter estimation algorithm of "2D orthogonal matching pursuit (2D-OMP) sparse coarse estimation + continuous domain golden section fine estimation" is proposed to solve the problems of grid mismatch and high complexity of traditional algorithms. The results show that the root mean square error (RMSE) of velocity estimation of the proposed algorithm remains optimal. Compared with the traditional single pilot estimation and one-step search algorithms, the accuracy is improved by about 55% and 33% respectively, which can achieve the target perception of decimeter-level positioning and low false alarm rate. The research results provide a high-precision and high-reliability technical scheme for low-altitude safety protection of substations, and also lay a foundation for the large-scale application of 5G-A technology in t

Key words : ISAC；5G-A；parameter estimation；two-stage algorithm；substation safety