改进的基于互谱的宽带信号测向算法

发布时间：2018-04-05 13:31

本文选题：被动雷达　切入点：互谱　出处：《系统工程与电子技术》2014年05期

【摘要】：由于被动雷达中广泛应用的测角方法应用于宽带信号测向时存在着各种问题,将互谱法应用于被动雷达宽带信号测向。针对互谱法测向中相位模糊与测角精度存在的矛盾,提出用两频率点的频率差和对应的互谱相位差值的关系来解相位模糊的频率相位差值法,突破了互谱法中阵元间距不大于信号最小波长一半的限制,有效地保证了测角精度。最后对相位差值进行修正,解决相位跳变问题,用两个阵元即可实现宽带信号测向。仿真表明了该算法的有效性。
[Abstract]:Because there are various problems in the widely used angle measurement method in passive radar for wideband signal direction finding, the cross spectrum method is applied to the direction finding of passive radar wideband signal.In view of the contradiction between phase ambiguity and angle measurement precision in cross-spectral direction finding, a frequency phase difference method is proposed to solve the phase ambiguity by using the relationship between the frequency difference of two frequency points and the corresponding cross-spectral phase difference value.The method breaks through the limitation that the distance between the elements is not more than half of the minimum wavelength of the signal in the cross-spectral method, and effectively ensures the accuracy of the angle measurement.Finally, the phase difference value is corrected to solve the phase jump problem, and wideband signal direction finding can be realized by using two array elements.Simulation results show the effectiveness of the algorithm.
【作者单位】：哈尔滨工程大学信息与通信工程学院;中国人民解放军95862部队;
【基金】：国家自然科学基金(61201410) 中央高校基本科研业务费专项资金项目(HEUCF120802)资助课题
【分类号】：TN957.51

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