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Rosslyn Validation Blind comparisons to measured path loss in Rosslyn, VA at 900 and 1900 MHz Measurements were made using “street level” vertical dipole antennas (10 m high) and vertical polarized directional antennas on rooftops Vertically polarized receiving antenna was mounted on the roof of the van driven along the streets Rosslyn measurements are described in several journal and conference papers

High-Rise Area of Rosslyn, VA

Rosslyn, Virginia

Typical Validation for Rosslyn, VA Comparison of Measurements to “Blind” Predictions

Validation: Kent St., Rosslyn, VA Transmitter Site 8, Vertical Dipole, 900 MHz

Validation: Lynn St., Rosslyn, VA Transmitter Site 8, Vertical Dipole, 900 MHz

Propagation of a 100 ns Pulse in Rosslyn

Ottawa Validation

Ottawa

Ottawa – Albert Street

Ottawa – Queen Street

Helsinki

Helsinki – Route GH

Helsinki – Route IJ with Foliage

Urban Canyon FDTD calculation Set up a project in the same way as the ray-based calculations Select Urban canyon FDTD propagation model in the study area properties window For best results, choose cells per wavelength of at least 16 (at least 8 cells/wavelength in material with largest dielectric constant)

FDTD Calculated RMS Electric Field in Ottawa at 250 MHz

UTD Calculated RMS Electric Field in Ottawa at 250 MHz

Comparison of FDTD and UTD Calculated Fields at T= 560 ns UTDFDTD

Comparison of FDTD and UTD Calculated Fields at T= 950 ns UTDFDTD

Ottawa coverage prediction at 250 MHz using FDTD

Path Loss Along Laurier Street Calculated by UCFDTD and UTD (2)

Path Loss Along Bank Street Calculated by UCFDTD and UTD (2)

Effect of Building Materials on Propagation Concrete: ε = 15, σ = 0.05 S/m Brick: ε = 4, σ = 0.05 S/m Glass Window: ε = 2.4, ¼ in. thick Frequency = 900 MHz Fields combined incoherently except for correlated paths near diffraction boundaries