Title :
Effects of Array Orientations on Degrees of Freedom for 3D LoS Channels in Short-Range Communications
Author :
Xumin Pu ; Shihai Shao ; Kai Deng ; Youxi Tang
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this letter, we investigate the spatial degrees of freedom (DoF) of line-of-sight (LoS) channels in three-dimensional (3D) space with respect to the array orientations in short-range communications. First, the corresponding response of LoS channels is modeled using the spherical-wave model (SWM). The analytical expression for the spatial DoF of LoS channels with various array orientations is then derived and compared with that obtained in long-range communications. Both the analytical and simulation results show that the array orientations have a significant impact on the spatial DoF of short-range LoS channels.
Keywords :
antenna arrays; radiocommunication; wireless channels; 3D LoS channels; 3D space; DoF; SWM; array orientations; degrees of freedom; line-of-sight channels; long-range communications; short-range communications; spherical-wave model; Antennas; Arrays; Eigenvalues and eigenfunctions; MIMO; Simulation; Three-dimensional displays; Wireless communication; Degrees of freedom (DoF); line-of-sight (LoS); short-range communications; spherical-wave model (SWM);
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/LWC.2014.2381221
