scholarly journals RF DIRECTIONAL MODULATION TECHNIQUE USING A SWITCHED ANTENNA ARRAY FOR COMMUNICATION AND DIRECTION-FINDING APPLICATIONS

2011 ◽  
Vol 120 ◽  
pp. 195-213 ◽  
Author(s):  
Tao Hong ◽  
Mao-Zhong Song ◽  
Yu Liu
Keyword(s):  
Antenna Array ◽  
Direction Finding ◽  
Modulation Technique ◽  
Directional Modulation

scholarly journals Directional Modulation Technique for Linear Sparse Arrays

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 13230-13240 ◽  
Author(s):  
Feng Liu ◽  
Ling Wang ◽  
Jian Xie
Keyword(s):  
Sparse Arrays ◽  
Modulation Technique ◽  
Directional Modulation

Wideband direction-finding based on time-modulated antenna array

2015 ◽  
Author(s):  
Jingfeng Chen ◽  
Ronghong Jin ◽  
Haijun Fan ◽  
Junping Geng ◽  
Xianling Liang ◽  
...  
Keyword(s):  
Antenna Array ◽  
Direction Finding

scholarly journals An Effective Technique for Enhancing Direction Finding Performance of Virtual Arrays

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Wenxing Li ◽  
Xiaojun Mao ◽  
Wenhua Yu ◽  
Chongyi Yue
Keyword(s):  
Antenna Array ◽  
Interpolation Method ◽  
Doa Estimation ◽  
Direction Finding ◽  
Estimation Accuracy ◽  
Signal Subspace ◽  
Effective Technique ◽  
Resolution Capability ◽  
Significant Bias ◽  
Virtual Array

The array interpolation technology that is used to establish a virtual array from a real antenna array is widely used in direction finding. The traditional interpolation transformation technology causes significant bias in the directional-of-arrival (DOA) estimation due to its transform errors. In this paper, we proposed a modified interpolation method that significantly reduces bias in the DOA estimation of a virtual antenna array and improves the resolution capability. Using the projection concept, this paper projects the transformation matrix into the real array data covariance matrix; the operation not only enhances the signal subspace but also improves the orthogonality between the signal and noise subspace. Numerical results demonstrate the effectiveness of the proposed method. The proposed method can achieve better DOA estimation accuracy of virtual arrays and has a high resolution performance compared to the traditional interpolation method.

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