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Generalised space-time model for Rayleigh fading channels with non-isotropic
 

Summary: Generalised space-time model for Rayleigh
fading channels with non-isotropic
scatterer distribution
D.B. Smith and T.D. Abhayapala
A generalised space-time model based on Clarkes=Jakes model is
extended to the case of a non-isotropic distribution of scatterers. The
respective space-time correlation function and space-frequency cross
spectrum around the receiver are derived. A 3-D space-time plot of the
correlation function is shown for a specific scatterer distribution based
on a typical mobile radio scenario.
Introduction: The exploitation of temporal and spatial diversity can
significantly improve communication quality and associated system
performance in a rich-scattering wireless environment. This has been
demonstrated through proposals for space-time coded modulations
over multiple-input multiple-output (MIMO) radio channels which are
understood to be very beneficial for high data-rate systems, both
coherent [1], and non-coherent [2]. For the purposes of macroscopic
system design, better system models are required to obtain a more
rigorous evaluation of the proposed coding schemes. One such
scheme, based on a traditional Clarkes=Jakes model [3], has been

  

Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University

 

Collections: Computer Technologies and Information Sciences