Cross-polarization coupling measured for 800 MHz radio transmission in and around houses and large buildings

Cox, D.C.; Murray, R.R.; Arnold, H. W.; Norris, A.; Wazowicz, M.

doi:10.1109/tap.1986.1143714

Cited by 61 publications

(14 citation statements)

References 11 publications

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“…Crossed dipoles would not be suitable in this scenario since the horizontal dipole will still have some E θ polarization as well as E φ polarization so it would not be 100% horizontally polarized in this sense. A vertical dipole and a horizontal loop antenna would be suitable since the loop has only E φ polarization [14] so it can be considered a completely horizontally polarized "dipole". Using such antennas, there are three possible effects from the measurement antenna properties that could impact on measurements as follows:…”

Section: Theoretical Model For Measuring Polarization At the Mobilementioning

confidence: 99%

Characterization of Polarization Diversity at the Mobile

Brown

Saunders

Stavrou

et al. 2007

IEEE Trans. Veh. Technol.

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Abstract-Two new models to characterize polarization diversity at the mobile are presented and discussed. The first model builds upon existing theoretical models at the base station to demonstrate how those principles apply to the mobile fading environment. Due to the limitations of antennas at the mobile, this extended model, though relevant, is not sufficient to characterize polarization diversity of the antennas so this paper moves on to show how a new approach to polarization diversity at the mobile exists as an inherent feature within an angular diversity system. Results show that, for two polarizations in a fading environment, the best overall output occurs with a ±45 o element configuration although the diversity combiner itself has optimum performance with a ±67.5 o configuration due to lower correlation at the input. The second model is also used to demonstrate how differently polarized dipoles are using polarization diversity inherent within an angular diversity system.

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Section: Theoretical Model For Measuring Polarization At the Mobilementioning

confidence: 99%

Characterization of Polarization Diversity at the Mobile

Brown

Saunders

Stavrou

et al. 2007

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

show abstract

“…Therefore, the XPR is also determined by and as shown in the following: (10) The XPR corresponds to "cross-polarization coupling" [20] when the polarization of the transmitted radio waves is horizontal and corresponds to the reciprocal of the cross-polarization coupling when the polarization of the transmitted waves is vertical.…”

Section: A Three-dimensional Expression Of Megmentioning

confidence: 99%

Mean Effective Gain of Mobile Antennas in Line-of-Sight Street Microcells With Low Base Station Antennas

Ando

Taga

Kondô

et al. 2008

IEEE Trans. Antennas Propagat.

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A method for evaluating the mean effective gain (MEG) of mobile antennas in line-of-sight (LOS) street microcells with low base station antennas is investigated. The received power patterns of incident radio waves along typical streets measured in actual street microcells in urban areas of Tokyo are presented to clarify the proper distribution model for the incident radio waves. A two-dimensional statistical distribution model is proposed based on the measured received power patterns for the incident radio waves that follow a Gaussian distribution in the azimuth angle, but are concentrated in the horizontal plane in the elevation angle. The two-dimensional theoretical expression of the MEG that consists of the incident distribution model function and the radiation patterns in the horizontal plane of the mobile antennas is derived to evaluate easily the MEG. We show that the MEG values in street microcells are not defined as only one value and form the MEG pattern because the MEG values are changed by the relative direction of the radio waves arriving at the mobile station antennas. The measured and calculated MEG values (MEG patterns) of the whip antennas used in the experiments are in good agreement. The average error between the measured and calculated MEG values is within approximately 4.5 dB at maximum. The results show that the MEG degradation of the mobile station antennas due to the effect of the human body is properly evaluated by the proposed distribution model. The proposed statistical distribution model is valid and effective in both estimating the MEG values of mobile antennas and designing the LOS street microcell systems with low base station antennas.Index Terms-Line-of-sight (LOS) street microcells, low base station antennas, mean effective gain (MEG), mobile antennas, statistical distribution model of incoming radio waves.

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“…Kozono et al [2] measured orthogonally polarized signals as a function of the distance between MS and BS. Cox et al [3] extended the study of depolarized signals to the case of propagation within and around houses and large buildings. The authors showed that depolarized signals were distributed uniformly around the receiver except in a few residential locations.…”

Section: Characterization Of the Angle Delay And Polarization Of Mulmentioning

confidence: 99%

Characterization of the Angle, Delay and Polarization of Multipath Signals for Indoor Environments

Gurrieri

Willink

Petosa

et al. 2008

IEEE Trans. Antennas Propagat.

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Abstract-A high-resolution channel sounding technique has been used to investigate the cross-polarization of electromagnetic waves in the 5-6 GHz band. Experiments were performed in two non-line-of-sight indoor locations, and it was found that there is a strong dependency of the cross-polarization of multipath components on the elevation angle-of-arrival. For a vertically polarized transmitting antenna, clusters of co-polarized multipath components were confined predominantly to the region around the horizontal plane that contains the virtual line-of-sight between transmitter and receiver. In contrast, cross-polarized signals were detected for a variety of elevation angles with considerable power levels. The surroundings of the receiver were identified as the principal source of depolarized signals. In addition, time dispersion analysis of the multipath signals led to the determination of the AoAs where there is a strong correspondence between co-and cross-polarized signals as a consequence of the partial depolarization of MPCs. This work supports the exploitation of the joint space and polarization diversities in indoor propagation scenarios to improve the system performance.

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Cross-polarization coupling measured for 800 MHz radio transmission in and around houses and large buildings

Cited by 61 publications

References 11 publications

Characterization of Polarization Diversity at the Mobile

Characterization of Polarization Diversity at the Mobile

Mean Effective Gain of Mobile Antennas in Line-of-Sight Street Microcells With Low Base Station Antennas

Characterization of the Angle, Delay and Polarization of Multipath Signals for Indoor Environments

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