Title :
Spatial characterization of urban mobile radio channels
Author :
Toeltsch, Martin ; Laurila, Juha ; Molisch, Andreas F. ; Kalliola, Kimmon ; Vainikainen, Pertti ; Bonek, Ernst
Author_Institution :
Inst. fur Nachrichtentechnik und Hochfrequenztechnik, Technische Univ. Wien, Austria
Abstract :
We present statistical evaluations of wideband spatial dual-polarized radio channel measurements. Some 80 different street-level transmitter positions in downtown Helsinki, Finland, were measured. We chose three different receiver array sites below, at, and above the rooftop level of the surrounding urban environment. A super-resolution algorithm allows the determination of the directions of arrival of incident radio waves at a 16×62 elements base station antenna array. The main conclusion of our investigations is that the incident waves tend to cluster in azimuth, elevation and/or delay, which we justify by detailed statistical evaluations. Clustering is mainly defined by the surroundings of the base station. The cumulative distribution function of the powers of these clusters shows that in 90% of all cases, 75% of the total received power is concentrated in the two strongest clusters. Street guided propagation dominates at all three receiver sites, even if the base station is above the rooftop level
Keywords :
UHF antennas; UHF radio propagation; adaptive antenna arrays; delays; direction-of-arrival estimation; electromagnetic wave polarisation; land mobile radio; multipath channels; radio transmitters; receiving antennas; statistical analysis; 100 MHz; 2154 MHz; 3G wireless systems; Finland; Helsinki; UHF; adaptive antenna arrays; azimuth; base station antenna array; clustering; cumulative distribution function; delay; directions of arrival; elevation; incident radio waves; multipath parameters; radio channel measurements; receiver array sites; receiver sites; rooftop level; spatial characterization; statistical evaluations; street guided propagation; street-level transmitter positions; super-resolution algorithm; third-generation wireless systems; total received power; urban environment; urban mobile radio channels; wideband spatial dual-polarized measurements; Antenna measurements; Base stations; Clustering algorithms; Directive antennas; Land mobile radio; Position measurement; Radio transmitters; Receivers; Spatial resolution; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944873