| 摘要: |
| 为在复杂电磁环境下实现对多分量宽带线性调频信号的到达角(DOA)估计，研究了基于时频
子空间的到达角估计算法，对阵列接收信号通过二维时频掩膜滤波逐一提取各信源的时频自
项，建立了空时频矩阵，运用子空间技术得到各信源的到达角估计，并与宽带聚汇算法比较
，进行了仿真实验。仿真结果表明，由于充分利用了多分量线性调频信号的时频信息，在低
信噪比条件下，宽带时频子空间方法比宽带聚汇算法具有更高的DOA估计的分辨率和估计精
度。 |
| 关键词: 雷达电子对抗 阵列信号处理 时频分布 空时频矩阵 宽带聚
汇算法 |
| DOI： |
|
| 基金项目: |
|
| Direction of arrival estimation for multi-LFM wideband signal |
| WANG Xue-fei,SHANG Chao-xuan,WANG Chang-sheng |
| () |
| Abstract: |
| In studies on direction of arrival(DOA) estimation of multiLFM（Linear Fr
equency Modulation）wideband sources in intensive electromagnetic environmen
t, the method of narrowband source DOA estimation based on timefrequency subsp
a
ce analysis is applied in wideband array model, which extracts the timefrequen
c
y characteristic of array received signals through the twodimensional timefr
eq
uency mask filter, and then establishes spatial timefrequency distribution(ST
FD) matrix to use the subspace technology to get DOA estimation of sources.
The proposed algorithm is compared with the wideband focusing algorithm. Compute
r simulation results prove that wideband timefrequency subspace method perform
s
a better performance than wideband focusing algorithm. |
| Key words: radar ECM array signal processing time frequency distribution spatial time fre
quency distribution wideband focusing algorithm |
《电讯技术》编辑部 