Capacity ofMIMO Propagation Indoor Channel Comparison of Indoor to Indoor and Outdoor to Indoor Radio Link Performances
This paper presents an experimental study of the propagation channel in Indoor environment with two radio link configurations: outdoor to indoor (O2I) and indoor to indoor (I2I). The experimentation has been carried out with a MIMO set-up which allows a full 3D space-time characterization of the channel. The analysis of the measurement is based on the Power Delay Profile (PDP) and on the Directions of Arrival (DoA) and Departure (DoD) of the waves. Evaluations of MIMO capacity are realized considering degrees of freedom of the channel, angular spread in azimuth and in elevation. The results shows the impact of transmitter locations and of the frequency on the space-time characteristics of the channel and consequently on the MIMO system performances.
In this paper the determination of transfer functions from inside an Airbus A319 to outside the aircraft in a frequency range from 2 GHz to 8 GHz is presented. Two different aspects have been investigated. The first is the determination of the fuselage attenuation of the aircraft in order to see, if existing airport communications and radar systems could be disturbed by onboard installed equipment. The second concerns possible coupling from inside the aircraft to different relevant aircraft navigation and communication antennas which are mounted outside the aircraft along the fuselage. The different results of these two measurements are presented and possible interferences with existing systems are discussed.