3.2.1 Initializing a virtual array and a weight matrix

To place more antenna elements than those of a conventional array with the same array size, we first create D virtual linear orientation arrays with much smaller interspacing λ=16 (in general, the inter-element spacing of the conventional ULA is λ=2). Using the reweighted l1-norm minimization in the following step, we set a DM � DM dimension weight matrix Q as a unit matrix.
