CAJ | 학술논문

提出一种基于时频投影的跳频信号分选算法.从频域投影信号分选出潜在跳频信号频率集合.根据跳频信号瞬时带宽,将潜在跳频频率点邻域时频图投影到时域,分选潜在频率跳变点集合.根据从驻留期和过渡期直方图中提取的驻留期与过渡期参数集合,剔出定频信号,实现不同跳频网台信号分选.仿真给出了该算法的理论网台分选性能.实验测试结果表明,该算法能在处理延迟为一个跳周期条件下实时解跳出信噪比为SNR≥-5 dB跳频信号的基带IQ.
제출일충기우시빈투영적도빈신호분선산법.종빈역투영신호분선출잠재도빈신호빈솔집합.근거도빈신호순시대관,장잠재도빈빈솔점린역시빈도투영도시역,분선잠재빈솔도변점집합.근거종주류기화과도기직방도중제취적주류기여과도기삼수집합,척출정빈신호,실현불동도빈망태신호분선.방진급출료해산법적이론망태분선성능.실험측시결과표명,해산법능재처리연지위일개도주기조건하실시해도출신조비위SNR≥-5 dB도빈신호적기대IQ.
A Frequency-hopping selection algorithm based on time-frequency image projection method is proposed in this paper.The potential frequency set is fetched from the frequency axis projection signal.The potential temporal hopping point set is fetched from the temporal projection variance of the adjacent domain time-frequency image ac-cording to the instantaneous signal bandwidth.With the duration and transition parameter sets obtained from the corre-spondence histograms,the fix frequency signal is eliminated and the different frequency hopping signals are selected out.The theory selection performance is given out by simulation.The real-time experiment system shows that this algo-rithm can achieve the In-phase and Quadrature baseband signals with SNR ≥-5dB frequency hopping signal under one hop duration delay.