We cast the sensor selection problem for 3-D arrays using the worst-case two-target Cramér-Rao bound as a convex semi-definite program and obtain the binary selection by randomized rounding.

In this paper, a wideband two-dimensional (2-D) 16×16 Butler matrix based multibeam antenna array in the range from 24GHz to 28GHz is presented for 5G millimeter wave (mmWave) applications. The 16 ...