A New Nested Array Configuration With Increased Degrees of Freedom

作者：Huang, Huiping; Liao, Bin^*; Wang, Xiaoye; Guo, Xiansheng; Huang, Jianjun

来源：IEEE Access, 2018, 6: 1490-1497.

DOI：10.1109/ACCESS.2017.2779171

• Nested array
• array configuration
• degrees of freedom
• virtual array aperture
• parameter estimation
• direction-of-arrival

In this paper, a new linear array configuration based on the concept of two-level nested array is proposed. Specifically, the proposed array configuration consists of two uniform linear arrays (ULAs) plus a separate sensor with appropriate spacing apart. Compared with the original two-level nested array, the degrees of freedom of our proposed array configuration can be increased by 2L - 6 for an array with L physical sensors. Moreover, the virtual array aperture can be enlarged by nearly (L-2/2 - L - 2)(d(1), where d(1) is the inter-element spacing of the first ULA. Owing to these advantages, our proposed array configuration has enhanced resolution and achieves better performance in parameter estimation, such as direction-of-arrival (DOA) estimation. Numerical simulations of DOA estimation exhibit the effectiveness and superiority of this array configuration.

• 出版日期2018
• 单位电子科技大学; 深圳大学