The Study of 5G Massive MIMO End-to-End MPAC Test Solution

Zhang, Xiang; Liu, Xiaolong; Wei, Guiming; Zhao, Yichen; Guo, Yuhang

doi:10.23919/eucap48036.2020.9135332

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…To analyze the sensitivity of R mag to the excitation coefficients distortion, additional Monte-Carlo simulations have been performed, each iteration of which follows the following procedure: 1) the optimal excitation coefficients obtained from the measured EEFs are disturbed according to eq. ( 14) to get w ′ ; 2) the total field is computed as E tot = E el w ′ ; 3) the maximum co-polar field magnitude variation inside the TZ, R mag (7), is computed. The Monte-Carlo simulation is repeated for every θ scan , and the R mag at the 90% CDF level is computed.…”

Section: Prototype and Experimental Demonstrationmentioning

confidence: 99%

Hybrid OTA Chamber for Multidirectional Testing of Wireless Devices: Plane Wave Spectrum Generator Design and Experimental Demonstration

Iupikov

Krasov

Glazunov

et al. 2022

IEEE Trans. Antennas Propagat.

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This paper investigates practical implementation aspects of a novel hybrid chamber concept that has been recently introduced for over-the-air testing of wireless devices. The chamber allows to synthesize a spectrum of plane waves (PWs) incident on a device under test from a wide range of anglesof-arrival (AoAs) through exploiting multiple field scattering inside the overmoded waveguide chamber. An optimal design approach for the plane wave spectrum generator (PWSG) array inside the chamber is presented considering: (i) array antenna impedance matching for the desired test zone (TZ) quality and AoAs range; (ii) an operational frequency bandwidth of the test environment and an instantaneous signal bandwidth; and (iii) the impact of the PWSG excitation errors. A robust linearly constrained minimum variance (LCMV) beamformer is formulated to realize the desired test environment over a wide frequency band, while accounting for the varying number of the waveguide propagating modes as excited by the PWSG array. Numerical simulations and measurements with the first prototype of the hybrid chamber for FR1 frequency band (∼3.5 GHz) are presented. This prototype includes a 7 × 7 bowtie antenna element PWSG array, a 1.00 × 1.25 × 1.75 m metal waveguide chamber, an off-line optimal array beamforming setup, and a planar scanner for the TZ characterization.

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Section: Prototype and Experimental Demonstrationmentioning

confidence: 99%

Hybrid OTA Chamber for Multidirectional Testing of Wireless Devices: Plane Wave Spectrum Generator Design and Experimental Demonstration

Iupikov

Krasov

Glazunov

et al. 2022

IEEE Trans. Antennas Propagat.

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“…5G is the name given to the next generation of wireless connectivity, which cellular phone companies are deploying worldwide due to the large demand for high data rates and low latency in mobile service. It is slated to succeed the existing 4G networks, which currently serve as the backbone for most contemporary mobile devices Zhang et al (2020). All 5G wireless devices are connected to the Internet network by radio waves via an antenna in the cell.…”

Section: Introductionmentioning

confidence: 99%

Eavesdropping and Jamming via Pilot Attacks in 5G Massive MIMO

Angoue Avele,

Perez-Adán,

Pereira-Ruisánchez

2023

Congreso XoveTIC: Impulsando El Talento Científico (6º. 2023. A Coruña)

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In this work, we investigate pilot attacks for 5G single-cell multi-user massive multiple input multiple-output (MaMIMO) systems with a single-antenna active eavesdropper and a single-antenna jammer operating in time-division duplex (TDD) schemes. Firstly, we describe the attacks when the base station (BS) estimates the channel state information (CSI) based on the uplink pilot transmissions. Finally, we propose a reinforcement learning (RL)-based frame work for maximizing the system sum rate that proved robust to the eavesdropping and jamming attacks.

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