A High-Precision Two-Dimensional DOA Estimation Algorithm with Parallel Coprime Array

Improved two-dimensional DOA estima-tion of Non-circular Signals for Parallel Sparse Array

“…In order to extend original array, the CM of subarray1 is calculated and carry on the denoising processing as like [7] 2…”

“…By carrying out processes similar to (3) and ( 6) for (7), it can be noted that since 1 and 2 have the same elements, this letter uses the former value here. And in order to carry out the SS-MUSIC algorithm, it is necessary to intercept the continuous virtual sensors of the received signals based on SDC.…”

“…For convenience, we briefly introduce four common SLAs that will be used below (the order is coprime array (CA) [9], augmented coprime array (ACA) [10], coprime array with compressed inter-element spacing (CACIS) [10], two-level nested array (TNA) [11]), Then, the computational complexity is analyzed, and compared with the algorithm A [7] and algorithm B [11]. The amount of computation of the proposed algorithm is mainly composed of the following sections:…”

“…, where Y denotes the number of snapshots. From [7] and [11], it is known that the computational complexity of algorithm A and B is…”

“…Due to the complexity of parameters, and only one special case under a particular SLA is given in [7] and [11], it is not easy to compare directly. Therefore, we conduct 500 experiments to intuitively compare the running time, and it is assumed that the physical array is CACIS ( 6, 5, 3) M N p = = = , the number of snapshots is 500 and the angles of NC signals are (40 ,70 ),(50 ,65 )     , the result is shown in Table 2.…”