Title :
Exact ergodic capacity of MIMO OSTBC amplify-and-forward relay network with antenna correlation
Author :
Ferdinand, Nuwan S. ; Rajatheva, Nandana ; Latva-aho, Matti
Author_Institution :
Centre for Wireless Commun., Univ. of Oulu, Oulu, Finland
Abstract :
Antenna correlation is usually viewed as a detrimental effect in a multiple input multiple output (MIMO) system. This paper investigates how this affects the performance of an amplify-and-forward (AF) relay network. We consider multiple antennas at all nodes with a general correlation matrix structure having an arbitrary eigenvalue distribution. We derive exact closed form expression for the ergodic capacity and simplify to special case of distinct eigenvalues. Further, we investigate the system in high signal-to-noise ratio (SNR) and derive a simple asymptotic expression. Our results provide a comprehensive analysis and useful insight about the ergodic capacity of the system.
Keywords :
MIMO communication; Rayleigh channels; amplify and forward communication; antenna arrays; correlation methods; eigenvalues and eigenfunctions; matrix algebra; relay networks (telecommunication); space-time block codes; MIMO OSTBC amplify-and-forward relay network; Rayleigh fading; antenna correlation; arbitrary eigenvalue distribution; detrimental effect; exact closed form expression; exact ergodic capacity; general correlation matrix structure; multiple input multiple output system; orthogonal space time block coding; relay communication; signal-to-noise ratio; Antennas; Closed-form solutions; Correlation; Eigenvalues and eigenfunctions; Fading; Relays; Signal to noise ratio; Ergodic capacity; Rayleigh fading; amplify-and-forward relay; antenna correlation;
Conference_Titel :
Communications (ICC), 2013 IEEE International Conference on
Conference_Location :
Budapest
DOI :
10.1109/ICC.2013.6655429