Subspace-based localization and inverse scattering of multiply scattering point targets
EURASIP Journal on Applied Signal Processing
Angular correlation properties with random multiple scattering
IEEE Transactions on Signal Processing
Space-time duality in multiple antenna channels
IEEE Transactions on Wireless Communications
Physical limits to the capacity of wide-band Gaussian MIMO channels
IEEE Transactions on Wireless Communications
On physically-based normalization of MIMO channel matrices
IEEE Transactions on Wireless Communications
The capacity of wireless networks: information-theoretic and physical limits
IEEE Transactions on Information Theory
On a generic entropy measure in physics and information
WiOPT'09 Proceedings of the 7th international conference on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
IEEE Transactions on Wireless Communications
The capacity of MIMO systems with increasing SNR by electromagnetic analysis
IEEE Transactions on Wireless Communications
Degrees of freedom of cooperative MIMO in cellular networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Degrees of freedom of a communication channel: using DOF singular values
IEEE Transactions on Information Theory
Signal recovery with cost-constrained measurements
IEEE Transactions on Signal Processing
Why does the Kronecker model result in misleading capacity estimates?
IEEE Transactions on Information Theory
Random access heterogeneous MIMO networks
Proceedings of the ACM SIGCOMM 2011 conference
| Hi-index | 755.02 |
Multiple-antenna systems that are limited by the area and geometry of antenna arrays, are considered. Given these physical constraints, the limit on the available number of spatial degrees of freedom is derived. The commonly used statistical multiple-input multiple-output (MIMO) model is inadequate. Antenna theory is applied to take into account the area and geometry constraints, and to define the spatial signal space so as to interpret experimental channel measurements in an array-independent but manageable description of the physical environment. Based on these modeling strategies, for a spherical array of effective aperture A in a physical environment of angular spread |Ω| in solid angle, the number of spatial degrees of freedom is shown to be A|Ω| for uni-polarized antennas and 2A|Ω| for tri-polarized antennas. Together with the 2WT degrees of freedom for a system of bandwidth W transmitting in an interval T, the total degrees of freedom of a multiple-antenna channel is therefore 4WTA|Ω|.