Simulating the Multipath Channel With a Reverberation Chamber: Application to Bit Error Rate Measurements

Genender, Evgeni; Holloway, Christopher L.; Remley, Kate A.; Ladbury, John M.; Koepke, Galen H.; Garbe, Heyno

doi:10.1109/temc.2010.2044578

Cited by 155 publications

(110 citation statements)

References 22 publications

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“…The reverberation chamber (RC) has traditionally been used for overthe-air (OTA) measurements of passive antennas and active devices [2][3][4][5][6][7][8][9][10]. For various OTA tests, it is of fundamental importance to know the channel conditions under which the antenna or device under test is measured.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Measurement of the Doppler Spectrum in a Reverberation Chamber

Chen¹

2012

PIER M

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Abstract-In this paper, the measurement of the Doppler spectrum in a reverberation chamber (RC) is investigated. The estimation performance of the Doppler spectrum in the previous work is reformulated and analyzed. It is found that the previous RC Doppler spectrum evaluation is an inconsistent estimation. An improved method for evaluating the Doppler spectrum is presented, which makes use of the frequency stirring technique to enhance the estimation performance. In addition, the RC loading effect on the Doppler spectrum is investigated in this paper as well. Measurements are performed in a RC, based on which the Doppler spectrum is evaluated. It is shown that the improved method results in a smaller estimation variance and that the Doppler spread decreases with increasing RC loading.

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Section: Introductionmentioning

confidence: 99%

Evaluation and Measurement of the Doppler Spectrum in a Reverberation Chamber

Chen¹

2012

PIER M

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“…In [19] it is shown that the Q-factor can be extracted from the power delay profile (PDP) without the necessity of providing information about the environment. The relation is given by (2.6) where P 0 is the initial power level and ω is the angular frequency.…”

Section: Quality Factormentioning

confidence: 99%

Electromagnetic fields in reverberant environments

Vogt-Ardatjew¹

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SummaryThe phenomenon of resonating electromagnetic (EM) fields has been commonly and successfully exploited in reverberation chambers (RC) for the purpose of electromagnetic compatibility (EMC) testing, as well as modeling multipath environments. An RC is designed to maximize the amount of reflections while minimizing the losses, thus creating a statistically uniform, isotropic, and randomly polarized field. Due to the desired very high complexity of such a field, its description is best done statistically. Although largely successful, the currently used statistical models allow for a certain degree of freedom, especially with regard to defining the extreme field strengths, which are also the main cause of electromagnetic interference (EMI). Furthermore, some actual multipath, enclosed environments such as airplane fuselages, ships, or even building interiors, can unintentionally possess the ability to create enough strong reflections so that the resulting resonating EM field within them resembles the field inside a dedicated RC. Those reverberant environments (RE) can therefore utilize the methods and techniques similar to the ones used in laboratory conditions. Due to the very high complexity and diversity, resulting in increased difficulty of both numerical or analytical description of the REs, the analysis performed throughout this work is mainly experimental. Such an approach allows to bypass the often unreasonable or too generalized assumptions of the available models while utilizing purely empirical data.The initial step made in this thesis focuses on introducing REs as environments sharing multiple aspects of EM field shaping with RCs. The experimental analysis has been performed on two example REs by means of quality factor (Q-factor), insertion loss (IL), as well as goodness of fit (GOF) tests. The results, although highly variable with frequency, indicate a possible similarity to a referential RC analyzed alongside. Furthermore, due to the difficulty of collecting large amounts of data and parameter isolation in the REs, two dedicated chambers: a classical RC and the vibrating intrinsic reverberation chamber (VIRC), have been analyzed as candidates allowing to simulate an RE in laboratory conditions. By the means of Q-factor, k-factor, GOF, as well as number of samples, related to field repeatability, it has been shown that the VIRC provides substantially better conditions for the given purpose.The search of maximum field strengths in reverberant environments has been performed by exploiting the capability of the VIRC to efficiently generate large amounts of independent samples. Performing 1-hour long measurements in the VIRC allows to obtain the desired results with very high repeatability, while giving space for parameter isolation. The first hypothesis states that the maximum-to-average (max/avg) electric field ratio depends on the losses of the environment. The measurement campaign performed to test it consisted of multiple setups with highly spread Q-factors, additionally creating a link between...

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“…We can replicate specific power delay profiles [7], [11] by adding certain amounts of absorber and averaging over many different paddle positions. Inserting a wireless device into an appropriately loaded chamber offers a way of verifying wireless device performance in a repeatable lab-based environment, as shown in Fig.…”

Section: Recreating the Outdoor Urban Canyon Power Delay Profilementioning

confidence: 99%

“…ECENT publications have described the use of reverberation chambers for efficient, repeatable, free-field testing of wireless devices [1]- [7], improved channel modeling [8], and simulating specific environments [9]- [11]. By adjusting the quality factor of the reverberation chamber's highly reflective cavity through the addition of RF absorbing material, it is possible to tune the decay time of the chamber to simulate realworld propagation environments.…”

mentioning

confidence: 99%

Reverberation-Chamber Test Environment for Outdoor Urban Wireless Propagation Studies

Fielitz

Remley²,

Holloway³

et al. 2010

Antennas Wirel. Propag. Lett.

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Abstract-We introduce a test environment to replicate the wellknown "clustering" of reflections in power delay profiles arising from late-time delays and reflections. Urban wireless propagation environments are known to exhibit such clustering. The test setup combines discrete reflections generated by a fading simulator with the continuous distribution of reflections created in a reverberation chamber. We describe measurements made in an urban environment in Denver, CO, that illustrate these multiple distributions of reflections. Our comparison of measurements made in the urban environment to those made in the new test environment shows good agreement.

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Simulating the Multipath Channel With a Reverberation Chamber: Application to Bit Error Rate Measurements

Cited by 155 publications

References 22 publications

Evaluation and Measurement of the Doppler Spectrum in a Reverberation Chamber

Evaluation and Measurement of the Doppler Spectrum in a Reverberation Chamber

Electromagnetic fields in reverberant environments

Reverberation-Chamber Test Environment for Outdoor Urban Wireless Propagation Studies

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