Time of Arrival and Angle of Arrival Statistics for Distant Circular Scattering Model

Abstract

Abstrak Model hamburan umum adalah proses hamburan lokal diasumsikan IntroductionRecently the use of smart antennas and beamforming technique has motivated to research the model for the spatial characteristics of the cellular mobile channel, various scattering models and related issues can be found in [1-10], the ring model [2], the scatterers are uniformly distributed on a ring which is centered about the mobile station (MS). Circular scattering model [4,5], the density of scatterers within a circular region about MS has been assumed to be uniform, this model was assumed to be most valid in macrocell environments where the antenna heights of the base station (BS) are relatively high without signal scattering from location near BS. Elliptical scattering model [6], where the scatterers are uniformly distributed within an elliptical region with foci at BS and MS respectively, this model was assumed valid in micro or picocell types of environments where the angular spread tends to be high and the delay spread tends to be low. References [7-10] gave some scattering model of non-uniform probability density function, such as Gaussian density scatter model [7], it assumed that the mobile station is surrounded by the scatterers of Gaussian distribution; the model was used in the study of diversity antennas and smart antennas. Rayleigh and exponential distributions model [8], analysis shows that the Rayleigh distribution scatterer model can predict the outdoor environment, while the exponential distribution scatterer model is suitable for the indoor environment. The hyperbolic scatterers distribution model [9], it has been shown that the hyperbolic the angle of arrival (AOA) probability density function is more effective than the Gaussian AOA probability density function when scatterers radius R≤3.3 km. A 3-D model is proposed in [10], which can be considered applicable to micro-and picocell environments.