Survey: Characterization and Mitigation of Spatial/Spectral Interferers and Transceiver Nonlinearities for 5G MIMO Systems

Peccarelli, Nicholas; James, Blake; Irazoqui, Robin; Metcalf, Justin G.; Fulton, Caleb; Yeary, Mark

doi:10.1109/tmtt.2019.2914382

Cited by 39 publications

(12 citation statements)

References 150 publications

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“…It has to be observed that the reduction of the PSLL by aperiodic arrangements is obtained by spreading the energy in a larger solid angle, thus raising the Average Side Lobe Level (ASLL) [26] with a consequent maximum array gain reduction. Moreover, these irregular array solutions based on an extensive optimization procedure present some challenges in terms of practical design increasing considerably the complexity of the feeding network [27], [28].…”

Section: Introductionmentioning

confidence: 99%

Exploitation of Triangular Lattice Arrays for Improved Spectral Efficiency in Massive MIMO 5G Systems

Dicandia

Genovesi

2021

IEEE Access

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A thorough analysis of the performance of planar arrays with a regular periodic lattice is carried out and applied to massive multiple-input-multiple-output (MIMO) systems operating within 5G NR n257 and n258 frequency band. It is shown that, among different arrangements with uniform spacing, a triangular lattice guarantees the reduction of the Average Side Lobe Level (ASLL), a better angular scan resolution of the main beam within a predefined angular sector and a lower mutual coupling level among elements. Moreover, single beam and multibeam application scenarios are considered for the performance comparison and both cases assess the remarkable features offered by a triangular arrangement. Particular attention is paid to illustrate, for different propagation channel scenarios, the effects of the array lattice on overall system performance including average gain as well as Signal-to-Interference plus Noise Ratio (SINR) and Sum Spectral Efficiency (SSE). The obtained results prove that a regular and periodic triangular lattice is appealing for arrays to be adopted in massive MIMO 5G systems. INDEX TERMS Antenna array, 5G, massive MIMO, multibeam antenna, broadband array.

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Section: Introductionmentioning

confidence: 99%

Exploitation of Triangular Lattice Arrays for Improved Spectral Efficiency in Massive MIMO 5G Systems

Dicandia

Genovesi

2021

IEEE Access

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“…As the spectrum becomes heavily utilized in sub-GHz bands, strong mutual interference can occur. Digital MIMO offers a solution for efficient use of scarce radio spectrum [1]. Although a digital MIMO receiver allows for spatial filtering in the digital domain, thereby reducing interference, the RF front-ends and ADCs are still susceptible to strong in-band interferers.…”

Section: Introductionmentioning

confidence: 99%

Interference Mitigation by Adaptive Analog Spatial Filtering for MIMO Receivers

Alaei

Golabighezelahmad

Boer

et al. 2021

IEEE Trans. Microwave Theory Techn.

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Exposed to strong co-channel/adjacent channel interference, digital Multiple-Input Multiple-Output (MIMO) receivers require high dynamic range Analog-to-Digital Converters (ADCs). Hybrid analog-digital beamforming featuring spatial filtering before the ADCs can adaptively mitigate interference in both the analog and digital domains; hence, relaxing the required dynamic ranges of the ADCs. This paper demonstrates the effectiveness of hybrid beamforming in this mitigation utilizing adaptive Minimum Mean Square Error (MMSE) and Error Vector Magnitude (EVM) as an optimization criterion. Extensive EVM measurements are carried out with a conductive set-up using a 4-element 22 nm FD-SOI CMOS prototype MIMO receiver chip to verify the performance of the adaptive MMSE algorithm. Over-the-Air (OTA) measurements with a linear 4element dipole antenna array with half-wavelength spacing in the 2.4 GHz ISM-band quantify the improvement for real world scenarios, e.g., having a multipath propagation channel and mutual coupling between the antenna array elements. OTA results show that a rejection of 22.5 dB and 24.5 dB can be achieved on average in an in-door laboratory environment utilizing Vector Modulator (VM) constellations with 16 and 64 points, respectively.

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“…Multiple‐input multiple‐output (MIMO) systems are a more appropriate choice than single‐input single‐output systems because of high spectral efficiency and high reliability [1]. In these systems, multiple antennas in the transmitter and receiver are used to create independent paths to transmit multiple signals simultaneously.…”

Section: Introductionmentioning

confidence: 99%

High‐gain, high‐isolation, and wideband millimetre‐wave closely spaced multiple‐input multiple‐output antenna with metamaterial wall and metamaterial superstrate for 5G applications

Khajeh-Khalili

Honarvar

Naser‐Moghadasi

et al. 2021

IET Microwaves Antenna & Prop

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A method to significantly increase the gain and isolation of a wideband multiple‐input multiple‐output (MIMO) antenna using metamaterial structures is reported. The proposed metamaterial medium includes just one wall and one superstrate, which are fixed in xz and xy planes of the MIMO antenna, respectively. The dimensions of the proposed MIMO antenna are 13×13×3.5 mm3 at 30 GHz. A comparison between a simulated MIMO antenna and a conventional microstrip antenna demonstrates the good performance of the proposed metamaterial environment. The corresponding return‐loss of the antenna is better than 10 dB over 28–32 GHz for 5G applications. The maximum simulated gain of the antenna is 17.1 dB at 30 GHz, generating a maximum gain enhancement of 11.8 dB in comparison with a MIMO antenna without any metamaterial structures. The isolation (insertion‐loss) is 36.7 dB at 30 GHz, which has improved by more than 29.4 dB compared to the conventional one.

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Survey: Characterization and Mitigation of Spatial/Spectral Interferers and Transceiver Nonlinearities for 5G MIMO Systems

Cited by 39 publications

References 150 publications

Exploitation of Triangular Lattice Arrays for Improved Spectral Efficiency in Massive MIMO 5G Systems

Exploitation of Triangular Lattice Arrays for Improved Spectral Efficiency in Massive MIMO 5G Systems

Interference Mitigation by Adaptive Analog Spatial Filtering for MIMO Receivers

High‐gain, high‐isolation, and wideband millimetre‐wave closely spaced multiple‐input multiple‐output antenna with metamaterial wall and metamaterial superstrate for 5G applications

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