A Jamming Detection Algorithm Based on Maximum Posterior Probability in Frequency Domain for Broadband Aeronautical Communications
WANG Peng
XIANG Xin
LAI Jianping
DONG Pengyu
LIANG Yuan
WANG Rui
Abstract：In view of the problems that frequency band resources of aviation communication are limited,and aviation broadband communication system is inevitably interfered with narrowband communication system,a jamming detection algorithm is proposed in frequency domain based on the maximum posterior probability criterion to achieve accurate jamming suppression in combination with the frequency threshold excision algorithm.In this paper,the algorithm structure of the jamming detection algorithm based on the maximum posterior probability criterion is established,and the formula of the detection threshold is de-rived from the hypothesis testing theory.In addition,the performance of single carrier frequency domain equalization is compared to that of the orthogonal frequency division multiplexing under narrowband jam-ming,and the performance advantages of single carrier frequency domain equalization are explored,provi-ding theoretical and experimental support for its potential application in broadband aviation communica-tion.And then,the proposed jamming detection algorithm is applied to single carrier frequency domain e-qualization.The simulation results show that this algorithm achieves yet a lower error rate at both low and high jamming-to-signal ratio(-20～20 dB)in comparison with the traditional jamming detection algo-rithms based on mean,variance,and median under conditions of the interference bandwidth being occupied 20％,10％and 5％in the signal bandwidth respectively.
Keywords：aeronautical communicationbroadband communicationnarrow-band jammingjamming detec-tionmaximum posterior probabilityjamming-to-signal ratio
Publication Date：2025-06-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 1-8 )