Improved Azimuth/Elevation Angle Estimation Algorithm for Three-Parallel Uniform Linear Arrays

Enhanced 2D-DOA Estimation for Large Spacing Three-Parallel Uniform Linear Arrays

“…The elevation angle and azimuth angle of ith target are θ i and φ i , respectively. Here, we assume that the range of 2D angle is the same with that of [12]. That is to say that the range value of θ i is 0, 1/2π and the range value of φ i is −1/2π, 1/2π Then, the output of the three ULAs can be expressed as follows:…”

“…Reference [11] has worse estimation accuracy, because some element information is missing when calculating the propagation matrix (PMA). Based on this, Chen et al [12] put forward an improved 2D angle estimation algorithm for threeparallel ULAs. It can solve all the problems mentioned in the above literature.…”

“…And it is also the main innovation of this paper. The flow of our algorithm is as follows: Firstly, we use the method in [12] to obtain the estimation of three directional cosines. Because of the large spacing between array elements, the estimated directional cosine is high precision and ambiguous.…”

“…Then, we can get the true 2D-DOA of targets. Simulation results show that it cannot only avoid the problem in [8][9][10][11] simultaneously but also has better estimation accuracy than algorithm of [12] because of adopting large aperture. And the complexity of the algorithm is comparable to that algorithm of [12].…”

Efficient method of two-dimensional DOA estimation for coherent signals

“…Among different DOA estimation methods, 2-D DOA estimation of coherent source signals [6][7][8][9][10] has drawn increasing attentions. Conventional high-precision methods, such as MUSIC [11] and ESPRIT [12], have achieved exciting performance.…”