Resultados experimentales de correlación espacial de un sistema MIMO en un entorno exterior-interior a 2.4 GHz

Abstract

For a better planning of a MIMO system is necessary a deep knowledge of the propagation channels characteristics and the degree of independence or correlation among them. This work presents the results obtained from the experimental analysis of the spatial correlation of a MIMO system as a function of the separation between receiver elements. The measurements were made at 2.4GHz for wireless applications in ISM band. The results show that the subchannels have a Rayleigh behavior and that the correlation depends on the relative disposition between receiver and transmitter array and on the presence or absence of line of sight. For LOS situations, depending on the receiver and transmitter relative position (in-line, broadside) the correlation distance gets values up to 6λ. Whereas, in NLOS situations the correlation distance is smaller than in LOS case, independently of the relative disposition of the arrays.