This paper presents approximation formulae of statistical distributions of the largest eigenvalue of i.i.d. (independent and identically distributed) MIMO (multiple input multiple output) channel correlation matrices under Rician (Nakagami- Rice) fading environment. The proposed formulae are based on space diversity theory adopting MRC (maximal ratio combining) scheme under Nakagami m fading channel which is known as a good approximation of Nakagami-Rice fading, hence it well approximates the largest eigenvalue distribution in MIMO Rician channels. The derived marginal distributions have a simple monomial form which is suitable for calculations of various performance indices of MIMO systems. Computer simulations show that the proposed approximation formulae are effective and have a better precision than conventional one.
['Tetsuki Taniguchi', 'Shen Sha', 'Yoshio Karasawa', 'Makoto Tsuruta']
Approximation of Largest Eigenvalue Distribution in Rician MIMO Channels