Capacity Bounds for Peak-Constrained Multiantenna Wideband Channels

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dc.creatorSchuster, Ulrich G.
dc.creatorDurisi, Giuseppe
dc.creatorBölcskei, Helmut
dc.creatorPoor, H. Vincent
dc.date2008-01-07
dc.date2008-01-29
dc.date.accessioned2026-07-07T08:56:40Z
dc.date.available2026-07-07T08:56:40Z
dc.descriptionWe derive bounds on the noncoherent capacity of a very general class of multiple-input multiple-output channels that allow for selectivity in time and frequency as well as for spatial correlation. 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 to coarsely identify the capacity-optimal combination of bandwidth and number of transmit antennas. Furthermore, we obtain a closed-form expression for the first-order Taylor series expansion of capacity in the limit of infinite bandwidth. From this expression, we conclude 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 beneficial.
dc.descriptionSubmitted to the IEEE Transactions on Communications
dc.identifierhttps://arxiv.org/abs/0801.1002
dc.identifierhttp://arxiv.org/abs/0801.1002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/146693
dc.subjectInformation Theory
dc.titleCapacity Bounds for Peak-Constrained Multiantenna Wideband Channels
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