The performance of the multiantenna systems can be deeply affected by the antenna layout, that is, the placement of the antenna\r\nelements in a given area. This paper focuses on the optimal antenna layout which can maximize the ergodic capacity of a multiinput\r\nsingle-output (MISO) beamforming system. Since the optimization problem cannot be solved analytically, we use simulated\r\nannealing (SA) algorithm to search for the optimal antenna layout.The results show that the optimal antenna layout depends highly\r\non the power azimuth spectrum(PAS) distribution and power elevation spectrum(PES) distribution. In the three-dimensional (3D)\r\nspace uniformly scattering environment, the optimal antenna layout will locate the antenna elements on the surface of a sphere.\r\nWhen the scattering is concentrated in a two-dimensional (2D) plane, the circular layout is the optimal and finally, when there is\r\nno scattering (single plane wave), the optimal layout is the nonuniform linear array.
Loading....