摘要
研究了空间时频分布在宽带阵列处理中的应用。在信号时频特征可分的情况,提出一种新的时频域宽带DoA估计算法,充分利用信号不同的时频特征,结合宽带聚集思想对每个源单独处理得到多个源的DoA估计。该方法具有很好的信号选择性以及抑制干扰和噪声的能力,估计性能优于传统空间时频分布方法。仿真结果验证了新方法的有效性。
A novel wideband direction of arrival estimation method is proposed based on the recently developed concept of spatial time-frequency distribution(STFD).The key idea of the method is to exploit the distinct time-frequency signatures of sources and the focusing technique in coherent signal subspace method.This method em-ploys a modified coherent signal subspace principle involving coherently averaging over a preselected set of t-f points for each source rather than the conventional frequency-only averaging procedure for all sources.The pro-posed method has the ability to select the signal of interesting and suppress interference and noise.And the method performs better than the conventional STFD based method.Simulation results verified the efficiency of the new method.
出处
《电声技术》
北大核心
2004年第10期44-47,共4页
Audio Engineering
关键词
宽带
波达方向估计
空间时频分布
聚集
wideband
direction of arrival estimation
spatial time-frequency distribution
focusing
