CAJ | 학술논문

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）。
토론료조성복사원적측향문제，제출료일충기우시연고계적관대측향산법。해산법장시연고계전화성빈솔고계，극복료기선거리요소우신호반파장적한제。결합고분변솔보고계적MUSIC산법，실현료다신호빈솔고계。기우조성신호적특수성，분석료일충신호개수고계방법。방진시험표명，재일정조건하，해방법능실현다조성복사원적신호개수고계이급각신호파체각고계（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.