航空兵器2026，Vol.33Issue(1)：84-92,9.DOI:10.12132/ISSN.1673-5048.2025.0103
基于双特征比的动态信道化子带检测算法
Dynamic Channelized Subband Detection Algorithm Based on Double Characteristic Ratio
摘要
Abstract
In the dynamic digital channelized reception architecture,subband detection provides positional information to the synthesis filter bank for signal reconstruction.To achieve reliable sub-band detection under low signal-to-noise ratio(SNR)and limited sampling conditions,this paper pro-poses a blind subband detection algorithm based on double characteristic ratio.Firstly,leveraging ran-dom matrix theory,employ the maximum-to-minimum eigenvalue ratio as an extremal feature and the arithmetic-to-harmonic mean eigenvalue ratio as a global feature,and integrate them into a detection statistic via a tuning factor.Then,the detection threshold is analytically derived from the asymptotic distribution of the largest eigenvalue of Wishart matrices by taking advantage of the false alarm prob-ability.Finally,simulation results demonstrate that the proposed algorithm achieves superior detection performance under low-SNR and limited-sample conditions compared to existing methods.关键词
动态数字信道化/随机矩阵/盲检测/特征值检测Key words
dynamic digital channelization/random matrix/blind detection/eigenvalue detection分类
军事科技引用本文复制引用
曹瑞龙,司伟建,韩顺利,周游..基于双特征比的动态信道化子带检测算法[J].航空兵器,2026,33(1):84-92,9.基金项目
国家自然科学基金项目(U24B6013) （U24B6013）
