A new simple model for land mobile satellite channels: first- and second-order statistics

Abstract

__ In this paper we propose a new shadowed Rice model for land mobile satellite channels. In this model, the amplitude of the line-of-sight is characterized by the Nakagami distribution. The major advantage of the model is that it leads to closed-form and mathematically-tractable expressions for the fundamental channel statistics such as the envelope probability density function, moment generating function of the instantaneous power, and the level crossing rate. The model is very convenient for analytical and numerical performance prediction of complicated narrowband and wideband land mobile satellite systems, with different types of uncoded/coded modulations, with or without diversity. Comparison of the first-and the second-order statistics of the proposed model with different sets of published channel data demonstrates the flexibility of the new model in characterizing a variety of channel conditions and propagation mechanisms over satellite links. Interestingly, the proposed model provides a similar fit to the experimental data as the well-accepted Loo's model, but with significantly less computational burden.

The Fluctuating Two-Ray Fading Model for mmWave Communications

“…Examples include the Rician shadowed fading model [13] as a generalization of Rician fading model, and the κ-µ shadowed fading model introduced in [10] as a generalization of Yacoub's κ-µ fading model. However, while the word "shadowing" was used when the models [10,13] were introduced, these models should not necessarily be linked to the large-scale fading phenomena called shadowing, caused by a complete or partial blockage by obstacles many times larger than the signal wavelength. Rather, the models in [10,13] considered shadowing to be any amplitude fluctuation in the specular waves (e.g.…”

“…However, while the word "shadowing" was used when the models [10,13] were introduced, these models should not necessarily be linked to the large-scale fading phenomena called shadowing, caused by a complete or partial blockage by obstacles many times larger than the signal wavelength. Rather, the models in [10,13] considered shadowing to be any amplitude fluctuation in the specular waves (e.g. due to shadowing by objects or human bodies, propagation condition variations or fast moving scatterers) that takes place over the time period of interest.…”

“…due to shadowing by objects or human bodies, propagation condition variations or fast moving scatterers) that takes place over the time period of interest. Therefore, considering the amplitudes of the specular components to be modulated by a Nakagamim random variable with squared unit mean as in [10,13], we can write:…”

“…The wireless channel model given in (2)- (3) for the particular case when N = 1 corresponds to the well-known Rician shadowed fading model [13]. In the rest of this paper, we will consider the case when N = 2 and will derive a statistical description of the resulting channel model.…”

Alerting Service for GEO Satellite System

“…Or else, the weak satellite-to-earth signals will be interrupted by shielding caused by any factors. By virtue of this, generally, channels in GMSS make use of Rician fading model whose factor k is 7 to 9 [2], [3], [4].…”