Optimizing MIMO Channel Capacities Under the Influence of Antenna Mutual Coupling

This letter investigates the effect of antenna mutual coupling involving the unconventional concepts of transmitting and receiving mutual impedances on the multiple-input multiple-output (MIMO) channel capacity. Suitable expressions for the optimum power allocation strategy under the influence of antenna mutual coupling are derived. The undertaken numerical analysis shows a significant difference in the calculated results for the optimized average channel capacity for the cases when antenna mutual coupling is taken into account or neglected. The obtained results indicate that to obtain the correct optimum power allocation strategy antenna mutual coupling effects need to be properly taken into consideration. This claim is supported by computer simulation examples.

[1]  A. Nix,et al.  Mutual coupling in multi-element array antennas and its influence on MIMO channel capacity , 2003 .

[2]  Ji Li,et al.  A stochastic MIMO channel model and the analysis of the spatial correlation properties , 2005, Proceedings. 2005 International Conference on Wireless Communications, Networking and Mobile Computing, 2005..

[3]  Jon W. Wallace,et al.  Deficiencies of 'Kronecker' MIMO radio channel model , 2003 .

[4]  Chen-Nee Chuah,et al.  Capacity scaling in MIMO Wireless systems under correlated fading , 2002, IEEE Trans. Inf. Theory.

[5]  R. Collin.  Antenna theory , 1969 .

[6]  R. Janaswamy.  Effect of element mutual coupling on the capacity of fixed length linear arrays , 2002, IEEE Antennas and Wireless Propagation Letters.

[7]  T.T. Zhang,et al.  Antenna Designer's Notebook - Receiving mutual impedance between two normal-mode helical antennas (NMHAs) , 2006, IEEE Antennas and Propagation Magazine.

[8]  Björn E. Ottersten,et al.  Second order statistics of NLOS indoor MIMO channels based on 5.2 GHz measurements , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[9]  M. J. Gans,et al.  On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas , 1998, Wirel. Pers. Commun..

[10]  R. Clarke.  A statistical theory of mobile-radio reception , 1968 .

[11]  Holger Boche,et al.  Channel capacity and capacity-range of beamforming in MIMO wireless systems under correlated fading with covariance feedback , 2004, IEEE Transactions on Wireless Communications.

[12]  Hui.  A new definition of mutual impedance for application in dipole receiving antenna arrays , 2004, IEEE Antennas and Wireless Propagation Letters.

[13]  Mohamed-Slim Alouini,et al.  Capacity of correlated MIMO Rayleigh channels , 2006, IEEE Transactions on Wireless Communications.

[14]  Hon Tat Hui,et al.  Decoupling Methods for the Mutual Coupling Effect in Antenna Arrays : A Review , 2007 .

[15]  Michael A. Jensen,et al.  Mutual coupling in MIMO wireless systems: a rigorous network theory analysis , 2004, IEEE Transactions on Wireless Communications.

[16]  F. De Flaviis,et al.  A mutual coupling study of linear polarized microstrip antennas for use in BLAST wireless communications architecture , 2000 .