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Published November 2016 | Submitted
Book Section - Chapter Open

Two-Dimensional Sparse Arrays with Hole-Free Coarray and Reduced Mutual Coupling

Abstract

Two-dimensional sparse arrays with hole-free difference coarrays, like billboard arrays and open box arrays, can identify O(N^2) uncorrelated source directions (DOA) using N sensors. These arrays contain some dense ULA segments, leading to many sensor pairs separated by λ/2. The DOA estimation performance often suffers degradation due to mutual coupling between such closely-spaced sensor pairs. This paper introduces a new 2D array called the half open box array. For a given N, this array has the same hole-free coarray as an open box array. At the same time, the number of sensor pairs with small separation is significantly reduced.

Additional Information

© 2016 IEEE. This work was supported in parts by the ONR grant N00014-15-1-2118, the California Institute of Technology, and the Taiwan/Caltech Ministry of Education Fellowship.

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August 20, 2023
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