摘要
提出一种基于空间谱图的跳频脉冲方向估计算法。通过计算各阵元数据的自谱图和互谱图构造时频域阵列模型,在时频面上的跳频脉冲能量聚集区域选择时频点构造空间时频分布矩阵,并采用Toeplitz对角化进行修正,最后运用MUSIC方法估计方向。该方法具有计算高效、可以去相干等优点。仿真结果验证了该方法的有效性。
A Direction finding method based on spatial spectrogram is proposed for frequency-hopping pulses.The array model is constructed in time-frequency domain by computing the auto-and cross-spectrogram of the output of sensors.By choosing the time-frequency points residing on different regions of high power concentration,the spatial time-frequency distribution matrixes are formed and modified by Toeplitz diagonalization.The direction parameters are then estimated based on the MUSIC.The proposed method can deal with coherent signals with high computation efficiency.The simulation results show the efficiency of the method.
出处
《无线电工程》
2010年第5期10-12,共3页
Radio Engineering
关键词
阵列处理
波达方向
空间时频分布
跳频
array processing
direction-of-arrival
spatial time-frequency distribution
frequency hopping
