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CORR
2008
Springer

Capacity Bounds for Peak-Constrained Multiantenna Wideband Channels

8 years 3 months ago
Capacity Bounds for Peak-Constrained Multiantenna Wideband Channels
Bounds are derived on the noncoherent capacity of a very general class of multiple-input multiple-output fading channels that are selective in time and frequency as well as correlated in space. The bounds apply to peak-constrained inputs; they are explicit in the channel's scattering function, are useful for a large range of bandwidth, and allow one to coarsely identify the capacity-optimal combination of bandwidth and number of transmit antennas. Furthermore, a closed-form expression is obtained for the rst-order Taylor series expansion of capacity in the limit of innite bandwidth. From this expression, it is concluded that in the wideband regime: (i) it is optimal to use only one transmit antenna when the channel is spatially uncorrelated; (ii) rank-one statistical beamforming is optimal if the channel is spatially correlated; and (iii) spatial correlation, be it at the transmitter, the receiver, or both, is benecial.
Ulrich G. Schuster, Giuseppe Durisi, Helmut Bö
Added 09 Dec 2010
Updated 09 Dec 2010
Type Journal
Year 2008
Where CORR
Authors Ulrich G. Schuster, Giuseppe Durisi, Helmut Bölcskei, H. Vincent Poor
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