233 / 2020-01-03 08:43:00

One-side Extended Nested Array for Degree of Freedom Enhancement

IEEE SAM 2020: Full Regular Papers > Direction-of-arrival estimation

In this paper, an extended nested array strategy is proposed for
degree of freedom (DOF) enhancement. Based on the augmented nested
array (ANA), with the inter-element spacings in the side subarray
increased, the strategy provides the possibility to acquire higher
number of DOF than the existing nested-like arrays, such as the
nested array, ANA, improved nested array and the maximum
inter-element spacing constraint array. The one-side extended nested
array (OS-ENA) is specifically proposed based on the ENA strategy,
which can successfully avoid the holes probably brought by the
sparse distribution of sensors and increase the DOF. The analytical
expressions of sensor locations and DOF are derived. Simulations of
the direction-of-arrival estimation verify the superiorities of the
proposed OS-ENA with the spacial smoothing MUSIC algorithm used.