Igor Zanchi

Estimation of Channel Parameters for " Saleh-Valenzuela" Model Simulation

The paper presents application of channel simulation according to statistical Saleh-Valenzuela model for a typical university building architecture. Estimation of parameters is based on analyze of measured power delay profiles, obtained in measuring campaign inside the same building. The vector network analyzer method of measuring was applied, inside 1600 - 2000 MHz frequency band. All measurements were done on single-floor. The first assessment of cluster arrival rate, ray arrival rate, cluster decaying factor and ray decaying factor was gained from spatial-averaged measured power delay profiles. The simulated cumulative distribution function of effective time delay was compared with measured one in order to optimize mentioned channel parameters. The final result is a great deal of agreement between the simulated and measured CDFs

Scaled Measurements and Ray-Tracing Simulations of Multipath Propagation Radio Channels

The paper is intended to explore a possibility to apply scaled radio measurements in estimation of real multipath propagation channel characteristics, such as impulse responses and corresponding autocorrelation functions. Naturally, the influence of estimated permittivity error on usability of such a procedure is supposed to be the main problem. In order to provide an insight in this issue, ray-tracing simulations of two typical multipath scenarios have been compared with corresponding scaled measurements. It has been concluded that, in order for a scaled measurement to be reliable, the permittivity issue with reference to the considered radio environment must be properly addressed