The multi-frequency propagation in urban environment is investigated in this letter. An experimental measurement campaign is conducted to simultaneously measure the GSM-900, GSM-1800 and UMTS band of a cellular system in a suburban environment. The shadowing and small-scale fading parameters are extracted, and the correlation of these parameters across the different frequency bands is measured. It is shown that shadowing coeffcients are highly correlated, while small-scale fading is completely uncorrelated between different frequency bands.
Van Laethem, B., Quitin, F., Bellens, F., Oestges, C., & De Doncker, P. (2012). Correlation for multi-frequency propagation in urban environment. Progress in Electromagnetics Research Letters, 29, 151-156. https://doi.org/10.2528/PIERL11111701 (Original work published 2012)