Effect of Signal and Noise Mutual Coupling on MIMO Channel Capacity

In this paper we analyze the impact of mutual coupling on MIMO channel capacity, considering its effect on both signal and thermal noise. We calculate noise correlation matrix in the multi-antenna system with closely spaced antenna by applying Nyquist’s thermal noise theorem. Then, we employ the noise correlation matrix in the channel capacity formula, which enables the identification of thermal noise correlation contribution on the MIMO channel capacity. In addition, we examine the variations in the mean branch signal-to-noise ratios (SNR) due to the noise correlation. Our simulation results corroborate the theoretical analysis that mean and outage MIMO channel capacity is underestimated if noise correlation due to mutual coupling effect is not accounted for.

[1]  Preben E. Mogensen,et al.  From antenna spacings to theoretical capacities - guidelines for simulating MIMO systems , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[2]  M.A. Jensen,et al.  Network model for MIMO systems with coupled antennas and noisy amplifiers , 2005, IEEE Transactions on Antennas and Propagation.

[3]  Christian Waldschmidt,et al.  Complete RF system model for analysis of compact MIMO arrays , 2004, IEEE Transactions on Vehicular Technology.

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

[5]  Volker Jungnickel,et al.  Capacity of MIMO systems with closely spaced antennas , 2003, IEEE Communications Letters.

[6]  S. Deger,et al.  Effect of Mutual Coupling on the Performance of Adaptive Arrays , 2006, 2006 IEEE 14th Signal Processing and Communications Applications.

[7]  Luc Vandendorpe,et al.  Mutual coupling effects on the channel capacity and the space-time processing of MIMO communication systems , 2003, IEEE International Conference on Communications, 2003. ICC '03..

[8]  Rodney A. Kennedy,et al.  Mutual Coupling Effect on Thermal Noise in Multi-Element Antenna Systems , 2005 .

[9]  Thomas Svantesson,et al.  Mutual coupling effects on the capacity of multielement antenna systems , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[10]  I. Gupta,et al.  Effect of mutual coupling on the performance of adaptive arrays , 1983 .

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

[12]  R. Twiss,et al.  Nyquist's and Thevenin's Theorems Generalized for Nonreciprocal Linear Networks , 1955 .

[13]  Sergei M. Rytov,et al.  Principles of Statistical Radiophysics 1: Elements of Random Process Theory , 1987 .

[14]  S. M. Rytov,et al.  Priniciples of statistical radiophysics. 3. Elements of random fields. , 1989 .

[15]  H. Wallman,et al.  Vacuum tube amplifiers , 1948 .

[16]  Helmut Bölcskei,et al.  Outdoor MIMO wireless channels: models and performance prediction , 2002, IEEE Trans. Commun..

[17]  Hüseyin Arslan,et al.  Dynamics of spatial correlation and implications on MIMO systems , 2004, IEEE Communications Magazine.

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

[19]  Joseph M. Kahn,et al.  Fading correlation and its effect on the capacity of multi-element antenna systems , 1998, ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384).

[20]  Predrag B. Rapajic.  Information Capacity of the Space Division Multiple Access Mobile Communication System , 1999, Wirel. Pers. Commun..