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On the Capacity of MIMO Wireless Channels
Hyundong SHIN Jae Hong LEE
Publication
IEICE TRANSACTIONS on Communications
Vol.E87B
No.3
pp.671677 Publication Date: 2004/03/01
Online ISSN:
DOI:
Print ISSN: 09168516 Type of Manuscript: PAPER Category: Fundamental Theories Keyword: channel capacity, multiple antennas, MIMO channels,
Full Text: PDF>>
Summary:
In this paper, we present a new closedform formula for the ergodic capacity of multipleinput multipleoutput (MIMO) wireless channels. Assuming independent and identically distributed (i.i.d.) Rayleigh flatfading between antenna pairs and equal power allocation to each of the transmit antennas, the ergodic capacity of such channels is expressed in closed form as finite sums of the exponential integrals which are the special cases of the complementary incomplete gamma function. Using the asymptotic capacity rate of MIMO channels, which is defined as the asymptotic growth rate of the ergodic capacity, we also give simple approximate expressions for the MIMO capacity. Numerical results show that the approximations are quite accurate for the entire range of average signaltonoise ratios.

