Test zone characterization for the multiprobe anechoic chamber setup (MPAC)

Scannavini, A.; Foged, L. J.; Gross, N.; Hentilä, Lassi; Virtala, J.; Raju, K Murthy

doi:10.1109/eucap.2016.7481161

Cited by 7 publications

(7 citation statements)

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“…It is realized by mapping the models into probe antennas positioned in a circular array which, along with a fading emulator and an anechoic chamber, is part of the setup used to test MIMO systems. Then, in recent works [21]- [23], the anechoic chamber is replaced by the multiprobe anechoic chamber (MPAC), due to the need of emulating multipath environments in a realistic and accurate way.…”

Section: ) Results For Trpmentioning

confidence: 99%

OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

Paola

Karstensen

Fan

2018

IEEE Antennas Propag. Mag.

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Abstract-This paper compares Over-The-Air (OTA) performance of traditional voice service and Voice over LTE (VoLTE). The results of the OTA measurements of the antenna performance of 22 mobile phones commonly used over the last two years are presented. VoLTE is a feature included into LTE which allows voice service to be delivered as data flows. Traditional investigations for LTE only include data service and therefore OTA for data services which is measured with the phone held in browsing position by the hand only, whereas the VoLTE uses the same data channel but in a position next to the head held by a hand. Traditional investigations of voice service only include voice service and OTA in voice service. The Figures of Merit (FoMs) taken into account for the ranking of the devices are the Total Radiated Power (TRP) and the Total Isotropic Sensitivity (TIS), related respectively to the transmitter and receiver antennas performance. The investigation includes results for talk mode using left and right hand phantoms next to head to calculate the maximum power radiated by the transmitter. To evaluate the sensitivity of the receiver, performances in talk mode using right hand phantom next to head as well as in data mode using only the hand phantom were considered. The results show a variation in TRP from 9 dB to 17 dB and approximately 9 dB spread in TIS among the phone models in the European LTE bands analyzed. Up to 8 dB difference in TRP between right and left hand usage were found for the worst performing phones, whereas their performances in free space are the same as the best performing phones. Key parameters of our analysis are accuracy, repeatability and testing time, since the equipment and the measurement procedure follow the CTIA Specification.

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Section: ) Results For Trpmentioning

confidence: 99%

OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

Paola

Karstensen

Fan

2018

IEEE Antennas Propag. Mag.

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“…We firstly apply the MUSIC algorithm in (9) with the weight vector in (10) for the far-field case and with the weight vector in (11) for the near-field case to determine the 3D pseudo PAS. As shown in Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Channel validation measurements in the 2D uniform MPAC setup for 4G MIMO terminals are widely reported in the academia and industry, see e.g. [6]- [10]. The focus has been on validating whether various channel parameters (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Millimeter-Wave New Radio Test Zone Validation for MIMO Over-the-Air Testing

Zhang

Hentilä

Kyösti

et al. 2022

IEEE Trans. Antennas Propagat.

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Standardization efforts to define radiated metrics and test methods for verifying millimeter-wave (mmWave) new radio (NR) devices are currently ongoing. Multi-probe anechoic chamber (MPAC) method, which is capable of reproducing spatial fading channels in the test zone, is selected as the reference solution for NR device testing. It is of importance to ensure that the defined testing propagation environment in the test zone is correctly implemented. In this paper, a novel algorithm is proposed to determine the wideband power-angle-delay profile of the reconstructed channels in the test zone for mmWave NR. The proposed algorithm is shown to be generic (applicable for both 2D and 3D testing setup) , applicable for both near-field and far-field conditions and robust (i.e. insensitive to measurement distance errors).

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“…As pointed out in [13], calibration of the practical SS-MPAC systems and validation of emulated channel models in the practical SS-MPAC setup are essential and currently missing in the literature. Channel-model-validation measurements for conventional 2D MPAC have been widely reported in academia and industry (see, for example, [10], [11], and [19]- [21]) and standardized in the wireless communication industry in the United States Cellular Telecommunications Industry Association and the 3GPP.…”

mentioning

confidence: 99%

Over-the-Air Testing of 5G Communication Systems: Validation of the Test Environment in Simple-Sectored Multiprobe Anechoic Chamber Setups

Fan

Zhang

Wang

2021

IEEE Antennas Propag. Mag.

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XXXXXO ver-the-air (OTA) radiated testing is seen as inevitable for 5G antenna systems. The simple-sectored multiprobe anechoic chamber (SS-MPAC) setup is a potential testing candidate for the evaluation of 5G antenna systems under real-world propagation conditions. Validation of emulated channel models in the practical SS-MPAC setup is essential, since it is important to ensure that the target channel models are correctly emulated. Our objective is to detect the joint-angle delay power profile of the reproduced channels in the SS-MPAC setup. In this article, we discuss two joint-angle delay estimation (JADE) algorithms: 1) an existing algorithm with high computation complexity as the reference method and 2) a novel, low-cost, sequential, 1D algorithm. Both numerical simulations and experimental verification measurements in a preliminary SS-MPAC setup are provided to validate the two discussed algorithms. The proposed sequential 1D search method is demonstrated to be highly accurate and effective and, therefore, is recommended for validation measurements in SS-MPAC setups. Measurement setup and procedures for test-environment validation are considered as well. SS-MPAC SETUPThe demand for ubiquitous, reliable, and high-speed wireless connectivity has been steadily growing. Both massive multipleinput, multiple-output (MIMO) technology and the use of frequencies in the millimeter-wave (mm-wave) range are considered essential to addressing these challenges in the upcoming 5G systems. Radiated OTA testing [i.e., testing without the device under test (DUT) physically connected to the test equipment] has been seen as inevitable for 5G antenna systems [1]- [6]. The 5G antenna systems will be large scale, beam steerable, highly compact, and integrated. It is expected that antennas will be integrated into radio-frequency (RF) transceiver circuits, that is, with no place to probe or put connections. As a result, it will be impractical to use traditional RF connectors between the radio circuit and the antenna due to the integrated design, creating the need for OTA radiated testing.It is important to test DUT performance in real-world propagation scenarios in the laboratory, where the DUT's end-to-end performance (including both radio and baseband parts) can be thoroughly evaluated [7], [8]. The MPAC method has been adopted in the standards for OTA performance testing of 4G LTE terminals due to its ability to test off-the-shelf DUTs, for which all critical parts of the design are evaluated at once [9]- [11]. The MPAC method offers a realistic test condition in which the device can operate normally with the help of a radio channel Validation of the test environment in simple-sectored multiprobe anechoic chamber setups.

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Test zone characterization for the multiprobe anechoic chamber setup (MPAC)

Cited by 7 publications

References 1 publication

OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

Millimeter-Wave New Radio Test Zone Validation for MIMO Over-the-Air Testing

Over-the-Air Testing of 5G Communication Systems: Validation of the Test Environment in Simple-Sectored Multiprobe Anechoic Chamber Setups

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