一种低信噪比条件下的跳频信号参数估计方法  

Parameter Estimation Method for Frequency Hopping Signal Under Low Signal-to-noise Ratio

作　　者：王增科 李怡 徐微[2] Wang Zengke;Li Yi;Xu Wei(College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300071,China;Institute of Electronics and Information Engineering,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]南开大学电子信息与光学工程学院,天津300071 [2]天津工业大学电子与信息工程学院,天津300382

出　　处：《南开大学学报（自然科学版）》2023年第3期18-22,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

摘　　要：为了有效估计在低信噪比条件下的跳频信号参数,提出了一种基于改进Wigner-Ville分布(modified Wigner-Ville distribution,MWVD)的估计算法,该算法通过选择一个低阶的切比雪夫多项式构造核函数以减小交叉项,然后,通过MWVD结果可以计算得到跳频信号的参数估计,仿真结果表明提出的算法可以有效估计跳频信号的参数,与其他算法相比,在低信噪比条件下该算法性能更优.To effectively estimate the parameters of the frequency hopping signals under low signal-tonoise ratio(SNR)scenario,a blind parameter estimation method based on the modified Wigner-Ville distribution(MWVD)is proposed.A low order Chebyshev polynomial is chosen as the kermel function for suppressing the cross-terms.Then,the parameters of the frequency hopping signals are finally obtained from the MWVD.The simulation results show that the method of processing frequency hopping signals used can effectively estimate its parameters,especially our scheme outperforms other estimating methods under low SNR scenario.

关 键 词：跳频信号 时频分析 低信噪比 参数估计 

分 类 号：TN911[电子电信—通信与信息系统]