摘要
讨论了噪声辐射源的测向问题,提出了一种基于时延估计的宽带测向算法。该算法将时延估计转化成频率估计,克服了基线距离要小于信号半波长的限制。结合高分辨率谱估计的MUSIC算法,实现了多信号频率估计。基于噪声信号的特殊性,分析了一种信号个数估计方法。仿真试验表明,在一定条件下,该方法能实现多噪声辐射源的信号个数估计以及各信号波达角估计(DOA)。
The direction-finding problems of noise sources are discussed. A direction-finding algo- rithm for the broadband signal is proposed based on the time delay estimation method. The time delay estimation is transformed into the frequency estimation, thus overcoming the restriction of baseline distance less than the half-wavelength. Frequency estimations of multi-signals are real- ized by multi-signal classification （MUSIC） algorithm with high resolution spectrum evaluation. A method for estimating signal numbers are analyzed. The simulation results show that the sig- nal number estimation of multi-noise-signal sources and the estimation of the direction of arrival （DOA） for each signal can be achieved under certain conditions.
出处
《指挥信息系统与技术》
2012年第6期45-50,共6页
Command Information System and Technology
关键词
噪声辐射源
测向算法
MUSIC算法
信号个数估计
波达角估计
noise source
direction-finding algorithm
multi-signal classification （MUSIC） algo- rithm
signal number estimation
direction of arrival （DOA）
