Comparative study of path losses from propagation measurements at 450 MHz, 900 MHz, 1.35 GHz and 1.89 GHz in the corridors of a multifloor laboratory-cum-office building

摘要

The tremendous growth of mobile radio systems and the future requirements for PCS will create a need for additional communication networks, particularly in densely populated urban areas where future generations of mobile systems will be introduced. System designers and radio frequency spectrum planners will require a detailed knowledge of indoor channel characteristics such as path loss, channel fading and pulse delays etc. The computation of path loss is of great importance to the planning of wireless indoor communication systems. Propagation measurements were performed at 450 MHz, 900 MHz, 1.35 GHz and 1.89 GHz in the corridors on the second, first and ground floors of an Institute's building. A computer simulation tool was adopted for the calculation of channel parameters. Values of path loss exponent 'n', standard deviation, RMS delay spread, a measure for the spreading of the received signal and Rice factor 'k' were evaluated using experimental and simulated data. The Rice factor was found to vary between 0.2 to 9.60.