Measurement Verification of Plane Wave Synthesis Technique Based on Multi-Probe MIMO-OTA Setup

Fan, Wei; Carreño, Xavier; Nielsen, Jesper Ødum; Olesen, Kim; Knudsen, M.B.

doi:10.1109/vtcfall.2012.6398925

Cited by 17 publications

(23 citation statements)

References 3 publications

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“…For further comparison, the narrow band channel capacity was calculated as [35] ( ) = log 2 (det ( rx + tx ( ) ( ) H )), (15) where, rx is the identity matrix of size rx , and is the perantenna signal-to-noise ratio (SNR) at the Rx. The narrow band channel capacity was computed using = 10 dB from both the channel matrices.…”

Section: B Envelope Correlation and Capacitymentioning

confidence: 99%

Experimental Verification of a Plane-Wave Field Synthesis Technique for MIMO OTA Antenna Testing

Khatun

Kolmonen

Hovinen

et al. 2016

IEEE Trans. Antennas Propagat.

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This study evaluates the feasibility of plane-wave field synthesis (PWS) technique for multiple-input multipleoutput (MIMO) over-the-air (OTA) test facility, where a reference channel model is implemented. The test facility is based on a fading emulator and an anechoic chamber, equipped with multiple field emulating probes. The test facility emulates a radio channel condition using the PWS technique, based on the spherical wave theory. A simulation tool implementing the MIMO OTA field synthesis based on the PWS technique, named WIN-OTA, is established where the WINNER II is chosen as the reference channel model. The simulation results show that the PWS technique reproduces the reference channels accurately in terms of envelope distribution, spatial and temporal correlation, and channel capacity. The WIN-OTA implementation was verified by comparing the emulated fields and the throughput (TP) from the simulations with measurements for a practical MIMO OTA test facility. The results support the feasibility and accuracy of the field synthesis technique and the WIN-OTA implementation in MIMO OTA antenna testing.Index Terms-MIMO, MIMO OTA testing, plane wave, spherical wave expansion. . His current research interests are in the field of millimeter-wave CMOS circuits for integrated radio frontends.

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Section: B Envelope Correlation and Capacitymentioning

confidence: 99%

Experimental Verification of a Plane-Wave Field Synthesis Technique for MIMO OTA Antenna Testing

Khatun

Kolmonen

Hovinen

et al. 2016

IEEE Trans. Antennas Propagat.

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“…1. Then the objective function to obtain the optimal weights for horizontal polarization can be rewritten as: (5) Both objective functions in (1) and (5) are quadratic programming problems with linear constraints. This standard convex optimization problem can then be solved using the cvx package in MATLAB with high efficiency [12].…”

Section: ) Horizontal Polarizationmentioning

confidence: 99%

Antenna Pattern Impact on MIMO OTA Testing

Fan

Nielsen

Fránek

et al. 2013

IEEE Trans. Antennas Propagat.

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This paper investigates the impact of the DUT antenna pattern on the test area performance for multi-probe based MIMO OTA setup in terms of received voltage and spatial correlation. The plane wave synthesis (PWS) technique has been proposed for vertical polarization in the literature, where the goal is to approximate plane waves with arbitrary directions. The received voltage at the antenna terminal depends on the antenna radiation pattern and the impinging plane waves. A novel closed form technique to reproduce the received voltage with arbitrary incoming plane waves based on trigonometric interpolation is presented. The proposed technique provides a closed form solution for the PWS when the probe ring radius is infinite. The proposed technique shows that the impact of the antenna pattern on the induced received voltage accuracy is ruled by Nyquist sampling theory. Furthermore, the impact of the antenna pattern on spatial correlation accuracy for prefaded signal synthesis (PFS) technique is investigated as well. Simulation and measurement results show that the number of required probes depend directly on the DUT antenna pattern. To test realistic DUTs with higher variations in directivity, we need more probes to maintain the same received voltage and spatial correlation accuracy level.

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“…There is a great research interest to accurately emulate plane waves with arbitrary directions and polarizations illuminating the test zone. [3][4] [5]. For plane wave field synthesis with multiple probes in an anechoic chamber, the fundamental question is to which extent we can control the field structure inside the test zone where the device under test is located.…”

Section: Introductionmentioning

confidence: 99%

“…Phase calibration of the MIMO OTA system is required for field synthesis inside the test zone and hence phase deviation over the test zone is also critical to investigate for field synthesis [4]. In [5], the plane wave synthesis technique was verified by measurement in a practical MIMO OTA setup. The multi-probe setup is shown in Figure 1 (left) .…”

Section: Introductionmentioning

confidence: 99%

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Impact of probe placement error on MIMO OTA test zone performance

Fan

Nielsen

Carreño³

et al. 2012

2012 Loughborough Antennas &Amp; Propagation Conference (LAPC)

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Standardization work for MIMO OTA testing methods is currently ongoing, where a multi-probe anechoic chamber based solution is an important candidate. In this paper, the probes located on an OTA ring are used to synthesize a plane wave field in the center of the OTA ring, and the EM field for each probe is obtained using FDTD simulation. This paper investigates the extent to which we can control the field structure inside the test zone where the device under test is located. The focus is on performance deterioration introduced by probe placement error including OTA probe orientation error and location mismatch, which are general non-idealities in practical MIMO OTA test systems.

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Measurement Verification of Plane Wave Synthesis Technique Based on Multi-Probe MIMO-OTA Setup

Cited by 17 publications

References 3 publications

Experimental Verification of a Plane-Wave Field Synthesis Technique for MIMO OTA Antenna Testing

Experimental Verification of a Plane-Wave Field Synthesis Technique for MIMO OTA Antenna Testing

Antenna Pattern Impact on MIMO OTA Testing

Impact of probe placement error on MIMO OTA test zone performance

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