| 摘要: |
| 在处理相干信号源的方法上，传统的空间平滑方法如前后向平滑、加权前后向平滑
等都是非常有效的方法。然而，已有的空间平滑算法在信噪比较低或相干源的波达
方向角（DOA）相邻很近时无法精确估计，而且都必须以牺牲孔径为代价。因此当信号源数
目较大时，传统的空间平滑方法是无效的。针对这些问题，提出了一种新的实相干信号的估
计方法，在信噪比较低时仍可以准确估计邻近的相干源，而且没有孔径损失。仿真
结果验证了该方法的优越性。 |
| 关键词: 相干源 波达方向估计 空间平滑 |
| DOI：10.3969/j.issn.1001-893X. |
|
| 基金项目: |
|
| Improved Spatial Smoothing Technique Using Full Array |
| CHEN Xiao-zhen,TANG Hong,FU Hong-wei,LIANG Lu-jiang |
| (The Missile Institute，Air Force Engineering University，Sanyuan 713800，China) |
| Abstract: |
| In the context of coherent signal source, conventional spatial smoothi
ng methods such as forward/backward smoothing method, weighted forward/backward
smoothing method can be used effectively. However, the currently known spati
al smoothing algorithms not only are imperfect at low signaltonoise ratio(SN
R) or
when the DOAs of coherent source are near, but also reduce effective aperture o
f the array. Especially the number of coherent sources is large, conventional sp
atial smoothing methods are invalid.In view of these problems,a new method is pr
oposed which can perform well at low SNR from near directions. Simulation result
s are provided to verify the superiority. |
| Key words: coherent source DOA estimation spatial smoothing |
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