Toward a Circuit Theory of Communication

Ivrlač, Michel T.; Nossek, Josef A.

doi:10.1109/tcsi.2010.2043994

Cited by 178 publications

(159 citation statements)

References 30 publications

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“…While multi-port matching networks could potentially alleviate the impact of MC, these are generally difficult to implement for the large antenna arrays considered in this paper [51], [52]. The global MC matrix is expressed as [17], [28] …”

Section: Mutual Coupling Modelmentioning

confidence: 99%

On the Performance of Spatially Correlated Large Antenna Arrays for Millimeter-Wave Frequencies

Neil

García‐Rodríguez

Smith

et al. 2018

IEEE Trans. Antennas Propagat.

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Abstract-A spatially correlated large antenna array operating at millimeter-wave (mmWave) frequencies is considered. Based on a Saleh-Valenzuela channel model, closed-form expressions of the three-dimensional spatial correlation (SC) for wide, narrow and Von Mises power elevation spectra (PES) are analytically derived. The effects of the PES on the convergence to massive multipleinput-multiple-output (MIMO) properties is then illustrated by defining and deriving a diagonal dominance metric. Numerically, the effects of antenna element mutual coupling (MC) is shown on the effective SC, eigenvalue structure and mmWave user rate for different antenna topologies. It is concluded that although MC can significantly reduce SC for side-by-side dipole antenna elements, the change in antenna effective gain (and therefore signal-to-noise ratio) caused by MC becomes a dominating effect and ultimately determines the antenna array performance. The user rate of a mmWave system with hybrid beamforming (HBF), using an orthogonal matching pursuit (OMP) algorithm, is then shown for different antenna topologies with dipole and crosspolarized (x-pol) antenna elements. It is seen that even for small numbers of radio-frequency chains, the OMP algorithm works well relative to the fully digital case for channels with high SC, such as the x-pol antenna array.

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Section: Mutual Coupling Modelmentioning

confidence: 99%

On the Performance of Spatially Correlated Large Antenna Arrays for Millimeter-Wave Frequencies

Neil

García‐Rodríguez

Smith

et al. 2018

IEEE Trans. Antennas Propagat.

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“…In traditional multiple antenna transmitters with multiple RF chains, the currents are driven by the RF voltage supply of each antenna element through fixed impedances [6]. Whereas, at the parasitic elements.…”

Section: A Espar Transmittermentioning

confidence: 99%

Multi-antenna transmission using ESPAR with peak power constraints

Zhou

Khan

Ratnarajah

et al. 2017

2017 25th European Signal Processing Conference (EUSIPCO)

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Abstract-Electronically steerable parasitic array radiator (ESPAR) technology provides multi-antenna transmission with a single radio frequency (RF) unit. In order to achieve stable transmission using an ESPAR antenna (EA), two approaches have been proposed in literature. One is to increase the selfresistance of an EA, the other is to transmit signals closely approximating the actual signals that keep the EA stable. In both approaches, no constraint on the transmission power of an EA was considered. This is not the case in actual systems, as the practical power amplifier normally has limited peak power. Taking into account the limited power availability, an optimization problem is formulated with the objective to minimize the MSE between the currents corresponding to the ideal and the approximate transmission signals. The non-convex problem is solved analytically by coordination transformation and a novel algorithm is proposed. It is shown that the system employing the proposed transmission scheme gives similar performance to that of a standard multiple antenna system, especially at low SNRs. In addition, it is shown that increasing the self-resistance of an EA to achieve stability is highly power inefficient.

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“…The 4-antenna-system is modelled as a linear 4-port system, where 2 ports are on the Tx side and the remaining 2 ports on the Rx side. The results are described in the form of a scattering or impedance matrix [7], [8]. The channel strengths are then investigated in order to study the strongest channel between the Tx and Rx ends.…”

Section: Multiport System Modelmentioning

confidence: 99%

Analysis of a near field MIMO wireless channel using 5.6 GHz dipole antennas

Maricar

Gradoni

Greedy

et al. 2016

2016 ESA Workshop on Aerospace EMC (Aerospace EMC)

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Understanding the impact of interference upon the performance of a multiple input multiple output (MIMO) based device is of paramount importance in ensuring a design is both resilient and robust. In this work the effect of element-element interference in the creation of multiple channels of a wireless link approaching the near-field regime is studied. The elements of the 2-antenna transmit-and receive-arrays are chosen to be identical folded dipole antennas operating at 5.6 GHz. We find that two equally strong channels can be created even if the antennas interact at sub-wavelength distances, thus confirming previous theoretical predictions.

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Toward a Circuit Theory of Communication

Cited by 178 publications

References 30 publications

On the Performance of Spatially Correlated Large Antenna Arrays for Millimeter-Wave Frequencies

On the Performance of Spatially Correlated Large Antenna Arrays for Millimeter-Wave Frequencies

Multi-antenna transmission using ESPAR with peak power constraints

Analysis of a near field MIMO wireless channel using 5.6 GHz dipole antennas

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