Limit for the proportion of remaining samples in the mode‐stirred chamber sample selection technique

Hallbjörner, Paul; Sánchez‐Heredia, Juan D.; Reyes, E.; Sánchez‐Hernández, D.

doi:10.1002/mop.26336

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…In this process, the number of data samples is reduced. By mathematical derivation, we can calculate the maximum number of remaining samples for a given target correlation value, as a function of the correlation in the initial data by [12], The number of remaining samples is important in order to obtain a good accuracy in the measurements. In this case we can see a big reduction in the number of samples for some combinations of initial/target correlations.…”

Section: Application To Correlation Coefficientmentioning

confidence: 99%

Versatile emulation of antenna correlation coefficient as MIMO OTA figure of merit using mode-stirred reverberation chambers

Hallbjörner¹,

Sánchez‐Heredia

Martinez-Gonzalez

et al. 2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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Mode-stirred chambers provide an excellent tool for antenna characterization and MIMO OTA compliance testing of wireless devices. Recent research has focused on making the mode-stirred chamber technique more versatile. One result of these efforts is the sample selection technique, by which a sub-set of data with specific properties is extracted from a measured set of raw data. This paper presents how to apply the sample selection technique to measurements of the correlation coefficient for MIMO OTA evaluation of wireless devices. Theoretical background and useful mathematical relations are presented. The application is verified through measurements.

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Section: Application To Correlation Coefficientmentioning

confidence: 99%

Versatile emulation of antenna correlation coefficient as MIMO OTA figure of merit using mode-stirred reverberation chambers

Hallbjörner¹,

Sánchez‐Heredia

Martinez-Gonzalez

et al. 2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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Section: Mimo Capacitymentioning

confidence: 99%

Measurement techniques enhancements for MIMO 4G mobile communication systems. extension of mode stirred reverberation chambers (MSRCs) emulation capabilities

Sanchez¹,

Diego²

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Mobile communications have experienced a brutal raise over the past 15 years.What started as a voice communication system (GSM or 2G) has finished yet as a data communication system of any kind, which in some cases has come to replace the conventional cabled data access infrastructure. This change in the use given to mobile devices necessarily entails a change in the underlying technology, which should be capable to provide the transmission speeds that these new applications require. This has emerged in recent years an increasing interest in multiple antenna techniques, usually referred as multiple-input multiple-output (MIMO) techniques, as they increase the spectral efficiency (and thus the transmission rate for a given bandwidth) of wireless systems.In this thesis, some of the factors limiting the ideal advantages of these multiantenna techniques are studied, in order to quantify the differences between the ideal behavior of 4G devices and behavior that users will experience in actual use conditions. The effect that the user has on the final performance of the devices is one of the main limitations that these devices are in daily use. Mobile phones are used almost all the time in the vicinity of the user, causing a decrease in the richness of the multipath electromagnetic environment (and thus a reduction of the MIMO benefits).As a result of this reduction, the number of signal paths that reach the user is also reduced. In this thesis both factors (user influence and influence of the number of signal paths) will be studied both for passive devices (antenna prototypes) and active devices (commercial phones).The second part of this thesis consist on the study of how to transfer some of these factors reducing the isotropicity of the environment, to one of the most promising measurement techniques, as it is the mode-stirred reverberation chamber (MSRC).This technique emulates naturally an isotropic rich multipath environment with the signal strength following a Rayleigh distribution. However, in this thesis two new techniques are proposed that allow the emulation of less isotropic environments without altering the basic operating principle of the MSRC.

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MIMO Over‐The‐Air Testing

Glazunov

Kolmonen

Laitinen

2012

LTE‐Advanced and Next Generation Wireless Networks

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Limit for the proportion of remaining samples in the mode‐stirred chamber sample selection technique

Abstract: An expression is derived for the maximum proportion of remaining samples in the sample selection technique for mode-stirred chamber measurements. The limit is independent of the selection algorithm used. The limit is verified in simulations as well as measurement examples.

Cited by 5 publications

References 6 publications

Versatile emulation of antenna correlation coefficient as MIMO OTA figure of merit using mode-stirred reverberation chambers

Versatile emulation of antenna correlation coefficient as MIMO OTA figure of merit using mode-stirred reverberation chambers

Measurement techniques enhancements for MIMO 4G mobile communication systems. extension of mode stirred reverberation chambers (MSRCs) emulation capabilities

MIMO Over‐The‐Air Testing

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