Resolving the ambiguities due to spatial undersampling in wideband uniform linear arrays

A subspace approach for DOA estimation of uniform linear arrays with increased element spacing applicable to wideband transmission

“…, N }. The signal received by the m th element of the array, from the l th frequency bin, can be expressed as [7]:…”

“…In section III, we address the problem of having k ∈ [1, K] sources impinging on the array, where we use a set of disjoint frequency group sets for transmit sources. Let us consider that the outputs of the array elements are appropriately pre-processed [7] at each frequency bin l and sampled at arbitrary time instance n = n i , i ∈ {1, 2, . .…”