摘要
基于非均匀的L型阵列,提出一种宽频段相干信号频率和二维到达角联合估计的新方法——JSDOA算法。该算法利用阵列时空数据构造了一个平滑的波达矩阵,通过对其进行特征分解估计出相干信号的三维参数。该算法能精确地估计具有相同数字频率的相干信号的三维参数,避免了阵列孔径损失,具有计算量小,三维参数自动配对的优点。计算机仿真结果验证了算法的有效性。
Based on non -uniform L - shaped array, a new method is presented to estimate the frequency and 2 - D arrival angles of coherent signals over a wide frequency band, which is called joint smoothing DOA （JSDOA） algorithm. The smoothed DOA matrix is constructed by using the temporal and spatial data of L - shaped array, and then 3 - D parameters of coherent signals can be obtained via the analysis of its eigenvalue. The algorithm is precise in estimating 3 - D parameters of coherent signals with same digital frequency, thus avoiding the loss of array aperture with smaller computational load and parameters paired automatically. The simulation results confirm its effectiveness.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2008年第2期36-38,91,共4页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家"863"计划资助项目(2006AA701307)
关键词
宽频段
相干源
三维参数估计
平滑技术
wide frequency band
coherent source
3 - D parameter estimation
smoothing technique
