Capacity for spatial-temporal correlated MIMO fading channel

Abstract

For a single channel Shannon's classical capacity formula predicts a capacity increase of 1 bit/cycle for every 3 dB increase in signal to noise ratio (SNR). Consequently in multiple antenna arrays, the increase in capacity can be in the order of almost n more bits/cycle for each 3 dB increase in SNR. This tremendous gain in capacity exhibited by MIMO channels over single antenna systems illustrates the enormous potential in wireless communications systems. This paper provides an analysis of multi-element antenna systems in a wireless channel. A geometric model incorporating local scatterers around the fixed user is presented. This space-time model considers non-isotropic scattering using the von Mises pdf at the user. This space-time cross correlation function includes some key elements, such as antenna element spacing, degree of scattering, angle of arrival at user and array configuration in MIMO channels. The capacity of the MIMO fading channel with varying; number of antenna elements, the degree of isotropic scattering at receiver and the spacing between the antenna elements are investigated and presented for the chosen model