Modulation-mode and power assignment in SVD-assisted MIMO systems with transmitter-side antennas correlation

Multiple-input multiple-output (MIMO) systems can provide a noticeable improvement in channel performance. Nevertheless some perturbances affect the capability of this technique to get the expected improvement. Due to the use of multiple antennas at the same front-end and their close spacing the so called antennas correlation effect appears. Antennas correlation can drastically affect the channel behaviour by increasing the bit-error rate (BER) and dropping its capability. This paper analyses the impact of transmitter-side antennas correlation on the MIMO system performance. The singular value decomposition (SVD) is used to transform the MIMO channel into independent layers. Afterwards bit and power allocation techniques are applied in order to obtain the best performance.

[1]  M. Dohler,et al.  MIMO systems with adaptive modulation , 2005, 2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514).

[2]  Joseph M. Kahn,et al.  Fading correlation and its effect on the capacity of multielement antenna systems , 2000, IEEE Trans. Commun..

[3]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

[4]  V. Kühn.  Wireless Communications over MIMO Channels: Applications to CDMA and Multiple Antenna Systems , 2006 .

[5]  Francisco Javier Ortega-González,et al.  Analysis of MIMO Systems with Transmitter-side Antennas Correlation , 2013, PECCS.

[6]  W.C.-Y. Lee.  Effects on Correlation Between Two Mobile Radio Base-Station Antennas , 1973, IEEE Trans. Commun..

[7]  Andreas Ahrens,et al.  Modulation-Mode and Power Assignment in SVD-Equalized MIMO Systems , 2008 .

[8]  J. H. Winters,et al.  Effect of fading correlation on adaptive arrays in digital mobile radio , 1994 .

[9]  J.E. Mazo,et al.  Digital communications , 1985, Proceedings of the IEEE.

[10]  Irving Kalet.  Optimization of Linearly Equalized QAM , 1987, IEEE Trans. Commun..

[11]  M. Dohler,et al.  MIMO systems with adaptive modulation , 2004, IEEE Transactions on Vehicular Technology.

[12]  Khaled Ben Letaief,et al.  Multiuser OFDM with adaptive subcarrier, bit, and power allocation , 1999, IEEE J. Sel. Areas Commun..

[13]  Claude Oestges,et al.  Validity of the Kronecker Model for MIMO Correlated Channels , 2006, 2006 IEEE 63rd Vehicular Technology Conference.