Statistical model of delay spread and coherence bandwidth for wide-band PCS at millimeter-waves in an urban mobile radio environment

A MM wave propagation model, based on multi-ray optical theory and the geometrical theory of diffraction (GTD), is used to statistically study the delay spread and coherence bandwidth (B_c) for wide-band personal communication services (PCS) in urban mobile radio environment. The statistical model results are compared with measurements and they agree that, for outdoors near street level, B_c is varying over a range of frequencies (14-100 MHz). It is shown that the B_c distribution depends on antenna heights, street layout, and frequency. The signal level statistics are evaluated which also agree with the measurements that, in general, the statistics are non-Rayleigh distributed