Coordinated MIMO with single-fed load-controlled parasitic antenna arrays

Ntougias, Konstantinos; Νταϊκος, Dimitrios; Papadias, Constantinos B.

doi:10.1109/spawc.2016.7536767

Cited by 9 publications

(11 citation statements)

References 10 publications

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“…However, the hybrid analogue-digital MU-MIMO optimization is an open problem. Here we propose two similar methods, one based on the HADB architecture introduced before, and a very low cost alternative based on multi-active multi-parasitic antenna arrays [8]. As general statement, the use of iterative methods for beamforming limits its applicability to real systems as the computational complexity is high.…”

Section: B Ptmpmentioning

confidence: 99%

Spectrum sharing in hybrid terrestrial-satellite backhaul networks in the Ka band

Artiga

Vázquez

Pérez-Neira

et al. 2017

2017 European Conference on Networks and Communications (EuCNC)

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Abstract-This work evaluates interference mitigation mechanisms to enable the operation of self-organizing hybrid terrestrial-satellite networks with aggressive frequency reuse between terrestrial and also satellite links. The objective is to take advantage of the improved capacity and resilience to congestion of such networks while assuring and efficient use of the spectrum. In particular, single-and multi-user hybrid analog-digital beamforming (HADB) techniques are considered as well as hybrid carrier allocation. The simulation results show network spectral efficiency improvements, with respect to conventional terrestrial backhaul systems, up to 2x when applying carrier allocation, and between 3.5x to 9x applying HADB in different environments.

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Section: B Ptmpmentioning

confidence: 99%

Spectrum sharing in hybrid terrestrial-satellite backhaul networks in the Ka band

Artiga

Vázquez

Pérez-Neira

et al. 2017

2017 European Conference on Networks and Communications (EuCNC)

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“…On the other hand, it is known that LC-PAAs can admit any input signal in transmit BF applications. Based on this remark, an alternative approach that enables the performance of robust, low-complexity, arbitrary channel-aware precoding with such arrays has been described in [12]: First, transmit BF using any valid method is applied and then channel-aware precoded transmission over the employed beams takes place.…”

Section: Robust Arbitrary Precoding Techniquementioning

confidence: 99%

“…This protocol can be applied in both MU-MIMO and Co-MC-MIMO setups. The system operation is divided in three phases [12]: 1) Learning phase: For each beam combination, the BS(s) sends a pilot signal. Then, the UTs measure their signalto-interference-plus-noise-ratio (SINR) or estimate the gain of the direct and cross channels and report back this channel quality metric.…”

Section: Low-complexity Communication Protocolmentioning

confidence: 99%

“…The precoding matrix is the (column-wise normalized) MoorePenrose pseudo-inverse of the multi-user channel matrix [12]:…”

Section: System Model and Linear Precoding Schemesmentioning

confidence: 99%

“…Reqularized ZFBF (RZFBF) is an extension of ZFBF where the pseudo-inverse of the composite channel matrix is regularized. The regularization coefficient is typically set such that the SINR at the users is maximized [12]:…”

Section: System Model and Linear Precoding Schemesmentioning

confidence: 99%

See 2 more Smart Citations

Large load-controlled multiple-active multiple-passive antenna arrays: Transmit beamforming and multi-user precoding

Ntougias¹,

Νταϊκος²,

Gizas³

et al. 2017

2017 25th European Signal Processing Conference (EUSIPCO)

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Abstract-In this work, we present the design of a novel large load-controlled multiple-active multiple-passive (LC-MAMP) antenna array that operates at 19.25 GHz. In addition, we describe a method that enables us to perform robust, low-complexity, arbitrary channel-dependent precoding with such arrays as well as a communication protocol that limits the computational complexity associated with beam tracking and dynamic load computation in static or low-mobility scenarios, such as indoor wireless access or wireless terrestrial backhaul use cases. Finally, we study the application of various user-and symbol-level precoding schemes in coordinated multiple-input multiple-output setups equipped with LC-MAMP arrays and we evaluate their performance through numerical simulations using a realistic channel model. The simulation results show that LC-MAMPs outperform equivalent digital antenna arrays.Index Terms-Load-controlled multiple-active multiple-passive arrays (LC-MAMP); coordinated multi-cell multiple-input multiple-output (Co-MC-MIMO); constructive-interference zeroforcing beamforming (CI-ZFBF); centimetre-wave (cm-wave) access; terrestrial backhaul.

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Single- and multiple-RF load controlled parasitic antenna arrays operating at Cm-wave frequencies: Design and applications for 5G wireless access / backhaul

Ntougias

Νταϊκος

Papadias

2017

2017 56th FITCE Congress

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MIMO technology is expected to play a key role in the endeavour to reach the capacity target of 5G systems, in conjunction with the use of frequencies above 6 GHz. This communication paradigm is anticipated to be utilised also in the wireless backhaul domain, in order to meet the high capacity requirements of the future wireless transport networks. The performance of the considered MIMO transmission methods is determined by the number of antennas that can be deployed on the transmitting nodes, which in turn is limited by cost and energy consumption constraints. Load controlled parasitic antenna arrays represent a type of antenna systems which are able to boost the performance of these communication schemes, while employing a small number of antennas. In this paper, we present the design of single-and multiple-fed parasitic antenna arrays operating at the 19 GHz frequency band. Moreover, we describe a simple and robust technique that allows us to perform arbitrary channel-dependent precoding with such arrays. Furthermore, we study a low-complexity communication protocol that can be applied to setups that are equipped with such antenna systems and used in low-mobility scenarios, such as wireless backhaul applications. The numerical simulation results showcase the validity of these approaches for both wireless access and backhaul applications and demonstrate the superiority of the parasitic antenna arrays over equivalent, regarding the number of their antenna elements, antenna systems. Index TermsCoordinated multiple-input multiple-output (Co-MIMO), channel state information (CSI), linear precoding, load-controlled parasitic antenna array (LC-PAA), wireless backhaul.

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Coordinated MIMO with single-fed load-controlled parasitic antenna arrays

Cited by 9 publications

References 10 publications

Spectrum sharing in hybrid terrestrial-satellite backhaul networks in the Ka band

Spectrum sharing in hybrid terrestrial-satellite backhaul networks in the Ka band

Large load-controlled multiple-active multiple-passive antenna arrays: Transmit beamforming and multi-user precoding

Single- and multiple-RF load controlled parasitic antenna arrays operating at Cm-wave frequencies: Design and applications for 5G wireless access / backhaul

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