Emulating Spatial Characteristics of MIMO Channels for OTA Testing

Fan, Wei; Lisbona, Xavier Carreño Bautista de; Sun, Fenggang; Nielsen, Jesper Ødum; Knudsen, Mikael B.

doi:10.1109/tap.2013.2261974

Cited by 96 publications

(81 citation statements)

References 10 publications

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“…Similar observations can be made for cluster 2. Optimization techniques to obtain power weights ω = {w k } ∈ R K×1 have been discussed in [3], [16] and results from [16] are used here.…”

Section: Capacity Evaluation For Multi-probe Anechoic Chamber Setupsmentioning

confidence: 99%

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Wideband MIMO Channel Capacity Analysis in Multiprobe Anechoic Chamber Setups

Fan

Kyösti²,

Nielsen

2016

IEEE Trans. Veh. Technol.

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Abstract-This paper discusses over the air (OTA) testing for multiple input multiple output (MIMO) capable terminals with emphasis on wideband MIMO channel capacity analysis in a multi-probe anechoic chamber setup. In the literature, the spatial correlation simulation accuracy at the receiver (Rx) side has been used to determine the test area size for a limited number of probes. However, it is desirable that the test area size is defined in terms of data rate deviation of the simulated channel in the laboratory from that of the target channel model. This paper reports MIMO capacity analysis results for wideband spatiotemporal channel models, with emphasis on the impact of spatial correlation at the transmit (Tx) side, the channel model, and the spatial correlation at the Rx side on the capacity simulation accuracy. Simulation results show that the number of probes is irrelevant to capacity simulation accuracy when the spatial correlation at the Tx side is in the high region (e.g. ρ > 0.7). Furthermore, when correlation at the Tx side is low, the spatial correlation accuracy is less critical with small correlation at the Rx side. The simulation results are further supported by measurements in a practical multi-probe anechoic chamber setup. The capacity simulation accuracy is shown to be a valid measure to determine the test area size.

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Section: Capacity Evaluation For Multi-probe Anechoic Chamber Setupsmentioning

confidence: 99%

“…Note that the spatial correlation results at the Rx side have been reported in the literature, see, e.g. [2], [6], [16], and is included here to explain the capacity results in the following sections. The measurement validation results presented in Figure 3, 4 and 5 are explained later in Section IV.…”

Section: A Simulation Scenariosmentioning

confidence: 99%

Wideband MIMO Channel Capacity Analysis in Multiprobe Anechoic Chamber Setups

Fan

Kyösti²,

Nielsen

2016

IEEE Trans. Veh. Technol.

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“…Therefore, there is a strong need for efficient testing of the throughput performance of a MIMO terminal [1]. Throughput measurements of LTE terminals have been reported using various MIMO over-the-air (OTA) testing methods [2]- [6]. Tremendous effort is ongoing in the 3rd generation partnership project (3GPP) standardization on MIMO-OTA harmonization, where the objective is to ensure same throughput results should be achieved with the same MIMO-OTA method in different laboratories (i.e.…”

Section: Introductionmentioning

confidence: 99%

Throughput Modeling and Validations for MIMO-OTA Testing With Arbitrary Multipath

Chen

Fan

Hentilä

et al. 2018

Antennas Wirel. Propag. Lett.

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Abstract-A simple throughput model for multiple-input multiple-output (MIMO) systems has been proposed in the literature. The model takes the MIMO antenna effects into account and shows good agreement with measured throughputs in a reverberation chamber (RC). The RC emulates a multipath environment with isotropic incoming angular distribution and Rayleigh (or Rician) fading channel. In this work, we extend the throughput model to arbitrary multipath environments and verify it using (synthesized) multi-probe anechoic chamber method and two-stage method with various channel models. The throughput model can well predict the measured throughputs of all the cases.Index Terms-Multiple-input multiple-output (MIMO), over-the-air (OTA) testing, throughput modeling

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“…Therefore, to reduce the need of measurement campaigns when measuring the performance of cellular devices, the telecom industry has adopted Over-the-Air (OTA) testing [4] using reverberation chambers [5]- [7], OTA multiprobe testing [8]- [11], and verification by the two stage method [12]. The research area of OTA multi-probe testing for cellular devices is very active today.…”

Section: Introductionmentioning

confidence: 99%

Measurement Uncertainty, Channel Simulation, and Disturbance Characterization of an Over-the-Air Multiprobe Setup for Cars at 5.9 GHz

Nilsson

Hallbjörner

Arabäck

et al. 2015

IEEE Trans. Ind. Electron.

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Abstract-Over-the-air multi-probe setups provide an efficient way to characterize the performance of today's advanced wireless communication systems. In this paper the measurement uncertainty of such a setup using a car as a test object is characterized through three experiments: measurement system analysis, channel sounder measurements, and probe coupling measurements. Four issues were in focus for the analysis; precision, realization of the wireless communication channel, coupling between the probes, and the influence of the test object size. The analysis shows that a large test object such as a car in an over-the-air multi-probe ring will affect the measurement uncertainty, but only to a small degree. The measurement uncertainty expressed as expanded uncertainty was below +/-1dB, a level that would not violate best practice total uncertainty levels for comparable over-the-air methods.

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Emulating Spatial Characteristics of MIMO Channels for OTA Testing

Cited by 96 publications

References 10 publications

Wideband MIMO Channel Capacity Analysis in Multiprobe Anechoic Chamber Setups

Wideband MIMO Channel Capacity Analysis in Multiprobe Anechoic Chamber Setups

Throughput Modeling and Validations for MIMO-OTA Testing With Arbitrary Multipath

Measurement Uncertainty, Channel Simulation, and Disturbance Characterization of an Over-the-Air Multiprobe Setup for Cars at 5.9 GHz

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