We present propagation analysis results for so called typical and bad urban macrocellular scenarios measured at 5.3 GHz carrier frequency and 100 MHz chip rate in Helsinki. Propagation characteristics between these scenarios have been compared, and small and large scale channel parameters have been extracted for stochastic geometry based channel models.

Wideband radio channel measurements have been performed in suburban macrocellular environment at 5.3 GHz carrier frequency and 100 MHz chip rate. This paper summarizes the radio channel properties, such as tap number, rms delay spread and K-factor characteristics for the power delay profiles. As for the system level channel characteristics, path loss and shadow fading autocorrelation models are presented

We present a statistical analysis of wideband three-dimensional channel measurements at base station locations in an urban environment. Plots of the received energy over azimuth, elevation, and delay planes suggest that the incident waves group to clusters in most measured transmitter positions. A super-resolution algorithm (Unitary ESPRIT) allows one to resolve individual multipath components in such clusters and hence enables a detailed statistical analysis of the propagation properties. The origins of clusters-sometimes even individual multipath components-such as street apertures, large buildings, roof edges, or building corners can be localized on the city map. Street guided propagation dominates most of the scenarios (78%-97% of the total received power), while quasi-line-of-sight over-the-rooftop components are weak(3%-13% of the total received power). For this measurement campaign, in 90% of the cases, 75% of the total received power is concentrated in the two strongest clusters, but only 55% in the strongest one. Our analysis yields an exponential decay of power with 8.9 dB//spl mu/s, and a standard deviation of the log-normally distributed deviations from the exponential of 9.0 dB. The power of cross-polarized components is 8 dB below copolarized ones on average (vertical transmission).

This paper presents the 360/spl deg/ azimuth angle channel modeling of wideband propagation in urban line-of-sight (LOS) microcellular environment of array antennas at the basestation and its experimental validations. First, the modeling includes rays from the whole 360/spl deg/ azimuth angles. Second, it verifies that the use of three-dimensional and two-dimensional methods in the forward and other reflection and diffraction propagation directions, respectively, is appropriate for the LOS propagation predictions. Third, it includes reflections from the curved surfaces of street corners and walls. Fourth, it extends existing expressions, making them applicable for array antennas at the base station. The results compared with wideband measurements provide better understanding of the propagation mechanism.

This paper describes a multichannel measurement system for the analysis of the radio channel of adaptive array antennas. It provides real-time recording of signals from multiple input channels. Due to this multielement reception, the incidence angles of the received signal components can be resolved. Wideband sounding provides the delay information. This allows the characterization of the two-dimensional radio channel of adaptive antenna systems in realistic environments. The system is based on a complex wideband radio channel sounder and a fast RF switch. As an example, the system allows measurement of complex impulse responses for a 16-element array with 17 ns delay resolution, and a delay range of 4.3 /spl mu/s for a 26 m/s mobile speed. The continuously recorded path lengths can be over one hundred meters. Practical channel measurements have been performed with a linear array of 8 elements. In these measurements the received signal components could be separated with 13/spl deg/ angular and 20 ns delay resolution. The developed method provides a novel approach to the two-dimensional analysis of the mobile environment.