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- W1963872884 abstract "This paper presents bounds on the noncoherent capacity of a very general multiple-input multiple-output channel, which allows for selectivity in time and frequency as well as for spatial correlation. The bounds apply to peak-constrained inputs; they are explicit in the channelpsilas 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 first-order Taylor series expansion of capacity in the limit of infinite 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 beneficial." @default.
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- W1963872884 date "2008-07-01" @default.
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- W1963872884 title "Capacity bounds for peak-constrained multiantenna wideband channels" @default.
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- W1963872884 doi "https://doi.org/10.1109/isit.2008.4595254" @default.
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