DocumentCode :
792967
Title :
A characterization of indoor space and frequency diversity by ray-tracing modeling
Author :
Corazza, Giovanni Emanuele ; Degli-Esposti, Vittorio ; Frullone, Mario ; Riva, Guido
Author_Institution :
Dipartimento di Ingegneria Elettronica, Rome Univ., Italy
Volume :
14
Issue :
3
fYear :
1996
fDate :
4/1/1996 12:00:00 AM
Firstpage :
411
Lastpage :
419
Abstract :
The performance of space and frequency diversity techniques at 1800 MHz in an indoor environment are investigated. Three linear signal combining techniques are considered: signal selection (SEL), maximal ratio combining (MRC), and equal gain combining (EGC). The computations of received fading envelopes are performed by means of an analytical model, based on a three-dimensional ray-tracing (RT)/uniform theory of diffraction (UTD) technique; the reliability of the adopted approach is confirmed by comparison with some test measurements. The electromagnetic field components are adequately processed to obtain the single branch and combined signal envelope. The results show the very significant benefits that can be achieved both in terms of diversity gain and diversity advantage for both diversity techniques. Antenna spacings of about 0.75-1λ are nearly sufficient for achieving optimum performance, whereas frequency separation on the order of 10 MHz is needed for sufficiently decorrelated transmission on the two carriers
Keywords :
UHF measurement; UHF radio propagation; diversity reception; fading; geometrical theory of diffraction; indoor radio; land mobile radio; multipath channels; ray tracing; 10 MHz; 1800 MHz; 3D ray tracing modeling; UHF; UTD; analytical model; antenna spacings; decorrelated transmission; diversity gain; electromagnetic field components; equal gain combining; fading envelopes; frequency separation; indoor environment; indoor frequency diversity; indoor space diversity; linear signal combining techniques; maximal ratio combining; multipath fading; optimum performance; reliability; signal envelope; signal selection combining; test measurements; uniform theory of diffraction; Analytical models; Diversity reception; Fading; Frequency diversity; Indoor environments; Performance evaluation; Physical theory of diffraction; Ray tracing; Reliability theory; Testing;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/49.490226
Filename :
490226
Link To Document :
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