Dense multiple antenna systems

Chiurtu, N.; Rimoldi, Bixio; Telatar, Emre

doi:10.1109/itw.2001.955153

Cited by 35 publications

(30 citation statements)

References 2 publications

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“…Performance is evaluated, as in most other works, in terms of the ratio of total transmit power to noise power per receiver . In this paper, in common with works such as [14] and [17], but unlike [1] and [2], we assume a normalization which ensures that the total receive power is the same as total transmit power, averaged over random instances of the channel matrix, that is (4) This has the effect of separating the array gain, due purely to the increase in antenna gain from more antenna elements, from any gain due to MIMO effects specifically. It is also equivalent to defining the SNR as the ratio of average total received signal power to noise power per element.…”

Section: Finite Scatterers Channel Modelmentioning

confidence: 99%

Capacity bounds and estimates for the finite scatterers MIMO wireless channel

Burr

2003

IEEE J. Select. Areas Commun.

117

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Article:Burr, A G orcid.org/0000-0001- 6435-3962 (2003) ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract-We consider the limits to the capacity of the multiple-input-multiple-output wireless channel as modeled by the finite scatterers channel model, a generic model of the multipath channel which accounts for each individual multipath component. We assume a normalization that allows for the array gain due to multiple receive antenna elements and, hence, can obtain meaningful limits as the number of elements tends to infinity. We show that the capacity is upper bounded by the capacity of an identity channel of dimension equal to the number of scatterers. Because this bound is not very tight, we also determine an estimate of the capacity as the number of transmit/receive elements tends to infinity which is asymptotically accurate.Index Terms-Finite scatterers channel model, multiple-inputmultiple-output (MIMO) capacity.

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Section: Finite Scatterers Channel Modelmentioning

confidence: 99%

Capacity bounds and estimates for the finite scatterers MIMO wireless channel

Burr

2003

IEEE J. Select. Areas Commun.

117

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“…Therefore, from (11), the correlation between the m-th and m -th modes at the transmitter region due to any mode at the receiver region is given by…”

Section: A Motivationmentioning

confidence: 99%

“…receive antennas. It was shown in [11] that the total received power at the receiver array should remain a constant for a given region, regardless of the number of antennas in it. In this situation, the normalized ergodic capacity is given by…”

Section: Introductionmentioning

confidence: 99%

Capacity optimizing power loading scheme for spatially constrained antenna arrays: Channels with narrow angular spread

Lamahewa

Abhayapala

Pollock

2008

2008 Australian Communications Theory Workshop

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Abstract-This paper proposes a capacity optimizing power loading scheme for spatially constrained antenna arrays. The proposed power loading scheme is designed mainly for MIMO systems that are operating over channels with narrow angular spread values. The design problem is approached from a physical wave field perspective, in particular using a modal expansion for free space wave propagation. When a signal is transmitted from a spatially constrained antenna array, there will be an infinite number of modes excited at the transmit antenna region and only a finite number of those excited modes will have sufficient power to carry information to the other end of the channel. We show that in a non-isotropic scattering environment, correlation between adjacent modes is significantly higher than the correlation between well separated mode orders. Based on this finding, the power loading scheme is designed to eliminate the correlation between adjacent modes by allocating zero power to every second effective mode at the transmitter region. The capacity performance of the proposed scheme is evaluated for 1-D and 2-D antenna array geometries and results are compared with the traditional equal power loading scheme. We show that the proposed scheme gives more scope for capacity improvements for 1-D arrays at low angular spread values than for 2-D arrays.

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“…This set of assumptions would apply, for example, if a systems engineer were considering adding small dipoles to a sparse linear array at the receiver, in which case the total effective area of the receive array would scale with N R . In contrast, [7] independently has considered asymptotic mean capacity for antenna arrays of fixed size assuming that the total average received power is fixed, thereby implying that the total effective area of the receive antennas does not grow with N R . Physically, this set of assumptions models the scenario where a single antenna element the size of the array is replaced with 1536 (5), where L R = 5 λ, ρ = 22 dB.…”

Section: Introductionmentioning

confidence: 99%

On the asymptotic capacity of MIMO systems with antenna arrays of fixed length

Wei

Goeckel

Janaswamy

2005

IEEE Trans. Wireless Commun.

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Abstract-Previous authors have shown that the asymptotic capacity of a multiple-element-antenna (MEA) system with N transmit and N receive antennas [termed an (N, N ) MEA] grows linearly with N if, for all l, the correlation of the fading for two antenna elements whose indices differ by l remains fixed as antennas are added to the array. However, in practice, the total size of the array is often fixed, and thus the correlation of the fading for two elements separated in index by some value l will change as the number of antenna elements is increased. In this paper, under the condition that the size of an array of antennas is fixed, and assuming that the transmitter does not have access to the channel state information (CSI) while the receiver has perfect CSI, the asymptotic properties of the instantaneous mutual information I N,N of an (N, N ) MEA wireless system employing uniform linear arrays in a quasi-static fading channel are derived analytically and tested for accuracy for finite N through simulations. For many channel correlation structures, it is demonstrated that the asymptotic performance converges almost surely, implying that such MEA systems have a certain strong robustness to the instantiation of the channel fading values.

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Dense multiple antenna systems

Cited by 35 publications

References 2 publications

Capacity bounds and estimates for the finite scatterers MIMO wireless channel

Capacity bounds and estimates for the finite scatterers MIMO wireless channel

Capacity optimizing power loading scheme for spatially constrained antenna arrays: Channels with narrow angular spread

On the asymptotic capacity of MIMO systems with antenna arrays of fixed length

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