摘要
针对非平稳的宽带线性调频信号 (LFM) ,本文利用了对称阵元分布 (WVD)将原始数据投影到时频波束空间建立了一种新颖的具有分维结构的空间时频分布数据模型 ,然后采用Beamspace ESPRIT算法、子空间投影法获得了信号瞬时频率和二维到达角的联合估计 .仿真实验证明算法精度较好 ,计算量小 。
The Wigner-Ville distributions of symmetrical sensors are used to project the data from element space to time-frequency beamspace, then a novel spatial time-frequency data model with a separable structure is achieved. Based on this model, beamspace-ESPRIT and subspace projection can be used respectively to get the instantaneous frequency and 2-D AOA of impinging signals. Simulation shows the efficacy of the proposed algorithm.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2004年第6期990-993,共4页
Acta Electronica Sinica
关键词
宽带线性调频信号
瞬时频率
时频波束空间
Computer simulation
Estimation
Frequency modulation
Mathematical models
Sensors