Title :
Experimental analysis of the joint statistical properties of azimuth spread, delay spread, and shadow fading
Author :
Algans, Albert ; Pedersen, Klaus Ingemann ; Mogensen, Preben Elgaard
Author_Institution :
Center for Personkommumcation, Aalborg Univ., Denmark
fDate :
4/1/2002 12:00:00 AM
Abstract :
Empirical results characterizing the joint statistical properties of the local azimuth spread (AS), the local delay spread (DS), and the shadow (slow) fading component are presented. Measurement data from typical urban, bad urban, and suburban (SU) environments have been analyzed. It is found that a log-normal distribution accurately fits the distribution function of all the investigated parameters. The spatial autocorrelation function of both AS, DS, and shadow fading can be modeled with an exponential decay function. However, for SU environments the spatial autocorrelation function is better characterized by a composite of two exponential decaying functions. A positive cross correlation is found between the AS and the DS, while both parameters are negatively correlated with shadow fading. All essential parameters required for the implementation of a simulation model considering the joint statistical properties of the AS, DS, and shadow fading are provided
Keywords :
UHF radio propagation; cellular radio; correlation methods; delays; fading channels; log normal distribution; parameter estimation; statistical analysis; 1.8 GHz; UHF; azimuth spread; bad urban environment; channel dispersion; cross correlation; delay spread; distribution function; exponential decay function; joint statistical properties; local azimuth spread; local delay spread; log-normal distribution; radio channel parameters estimation; radio propagation conditions; shadow fading; simulation model; slow fading; spatial autocorrelation function; suburban environment; terrestrial cellular systems; urban environment; Aluminum gallium nitride; Antenna arrays; Antenna measurements; Autocorrelation; Azimuth; Delay; Distribution functions; Fading; Frequency diversity; Radio propagation;
Journal_Title :
Selected Areas in Communications, IEEE Journal on