Title :
Relationship between measured 900 MHz complex impulse responses and topographical map data
Author :
Kirlin, R.L. ; Driessen, P.F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
1 GHz complex impulse response data in mountainous terrain is measured at closely spaced locations, and is processed as data from a synthetic aperture array. Experimental data from linear and crossed arrays with 50 or 100 elements is considered. The direction of arrival for each delayed component is identified, and contour plots of the receiver power at bearings and distances are produced. These contour plots closely match the topography of the region, and clearly indicate that the strongest mountain reflections come from the steepest slopes. These results are used to establish a relationship between the mountain reflection coefficients and the topography, thus making it possible to invert the problem and estimate the impulse response (multipath delay profile) in mountainous terrain directly from topographical map data. Such estimates can help to select cell site locations and antenna configurations to minimize the delay spread
Keywords :
UHF radio propagation; cellular radio; direction-of-arrival estimation; electromagnetic wave reflection; land mobile radio; topography (Earth); transient response; 900 MHz; 900 MHz complex impulse response; antenna configurations; bearings; cell site locations; closely spaced locations; crossed array; delay spread; delayed component; direction of arrival; distances; linear arrays; mountainous terrain; multipath delay profile; receiver power; reflections; slopes; synthetic aperture array; topographical map data; Array signal processing; Baseband; Delay effects; Delay estimation; Direction of arrival estimation; Radio transmitters; Reflection; Scattering parameters; Surfaces; Testing;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345411