Propagation characteristics for wideband outdoor mobile communications at 5.3 GHz

In this paper, empirical channel models and parameters are derived from the wideband measured data at 5.3 GHz in outdoor mobile communications. The path loss exponents and intercepts are obtained by using the least square method. The mean excess delay and mean root-mean-square (rms) delay spread are within 29-102 ns and 22-88 ns, respectively. The correlation distances and bandwidths are within 1-11 lambda and 1.2-11.5 MHz, respectively, when the envelope correlation coefficients equal 0.7 in line-of-sight cases. These correlation values depend strongly on the base station antenna heights. The window length for averaging out the fast fading components is about 1-2 in for microcells and picocells. The multipath number distributions follow both Poisson's and recently introduced Gao's distributions, but Gao's distribution is better at high probability region. Large excess delays up to 1.2 mus and rms delay spread about 0.42 mus are found in the urban rotation measurements, where the receiver is close to a large open square.