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has been cited by the following article:

• TITLE: Approximate Analysis of Power Offset over Spatially Correlated MIMO Channels

  AUTHORS: Guangwei YU, Xuzhen WANG

  KEYWORDS: MIMO, multiplexing gain, power offset, high snr region, toeplitz matrix

  JOURNAL NAME: Communications and Network, Vol.1 No.1, August 18, 2009

  ABSTRACT: Power offset is zero-order term in the capacity versus signal-to-noise ratio curve. In this paper, approximate analysis of power offset is presented to describe MIMO system with uniform linear antenna arrays of fixed length. It is assumed that the number of receive antenna is larger than that of transmit antenna. Spatially Correlated MIMO Channel is approximated by tri-diagonal toeplitz matrix. The determinant of tri-diagonal toeplitz matrix, which is fitted by elementary curve, is one of the key factors related to power offset. Based on the curve fitting, the determinant of tri-diagonal toeplitz matrix is mathematically tractable. Consequently, the expression of local extreme points can be derived to optimize power offset. The simulation results show that approximation above is accurate in local extreme points of power offset. The proposed expression of local extreme points is helpful to approach optimal power offset.