| 1. |
- Alayon Glazunov, Andres
(författare)
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A Monte Carlo study on the diversity measure of a spherical volume
- 2012
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Ingår i: Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012. - 9781457709180 ; , s. 21-24
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Konferensbidrag (refereegranskat)abstract
- In this paper we investigate the diversity measure ψ(R h) of MIMO (Multiple-Input Multiple-Output) channels based on the eigenvalues of the full-correlation matrix of the channel matrix R h. We apply this definition to antennas and channels based on the antenna scattering matrix and the spherical vector wave (svw) expansion of the electromagnetic fields. We derive bounds for this diversity measure in an isotropic propagation channel. We further analyze the diversity measure of a spherical volume occupied by decoupled λ/2-dipole antennas by means of Monte Carlo simulations assuming different polarizations, e.g., vertically or horizontally polarizations, 2 orthogonal polarizations and 3 orthogonal polarizations.
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| 2. |
- Alayon Glazunov, Andres, et al.
(författare)
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A note on the Mean Effective Radiated Power and the Mean Effective Receiver Sensitivity of mobile handheld terminals
- 2008
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Ingår i: 2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting. ; , s. 1-4, s. 4471-4474
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Konferensbidrag (refereegranskat)abstract
- In this paper we introduce the Mean Effective Radiated Power (MERP) and the Mean Effective Radiated Sensitivity (MERS) as alternative figures of merit of the uplink and downlink communication performance of wireless handheld terminals. We show how they are related to the Mean Effective Gain (MEG), the total radiated power (TRP) and total receiver sensitivity (TRS).
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| 3. |
- Alayon Glazunov, Andres
(författare)
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A survey of the application of the spherical vector wave mode expansion approach to antenna-channel interaction modeling
- 2014
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Ingår i: Radio Science. - 0048-6604 .- 1944-799X. ; 49:8, s. 663-679
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Tidskriftsartikel (refereegranskat)abstract
- This paper provides an overview of recent advances in the modeling, analysis, and measurements of interactions between antennas and the propagation channel in multiple antenna systems based on the spherical vector wave mode expansion of the electromagnetic field and the antenna scattering matrix. It demonstrates the importance and usefulness of this approach to gain further insights into a variety of topics such as physics-based propagation channel modeling, mean effective gain, channel correlation, propagation channel measurements, antenna measurements and testing, the number of degrees of freedom of the radio propagation channel, channel throughput, and diversity systems. The paper puts particular emphasis on the unified approach to antenna-channel analysis at the same time as the antenna and the channel influence are separated. Finally, the paper provides the first bibliography on the application of the spherical vector wave mode expansion of the electromagnetic field to antenna-channel interactions.
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| 7. |
- Alayon Glazunov, Andres, et al.
(författare)
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Clustering impact on the statistics of the multipole expansion coefficients of a wireless channel
- 2011
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Ingår i: Progress in Electromagnetics Research Symposium. ; , s. 603-607
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Konferensbidrag (refereegranskat)abstract
- It has been widely known that experimental results show that multipath components seem to arrive at the receiver in concentrated groups. These groups of multipath components, or clusters, are usually a result of scattering from large physical structures. Their impact on the capacity of Multiple-Input Multiple-Output (MIMO) systems has been widely studied. However, their impact on the spherical vector waves (svw) expansion of the propagation channel has not yet been addressed in the literature. As we have recently shown, a svw expansion provides a compact and straightforward representation of both antennas and channels. This can potentially facilitate designing antennas tailored to take advantage of the spatial and polarimetric characteristics of the propagation environment, which is essential to the deployment of efficient wireless networks. In this paper, we therefore study the impact of clustering on the first and second order statistics of the multimode expansion coefficients. We adopt the simulation approach to exemplify our results and provide numerical examples.
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| 8. |
- Alayon Glazunov, Andres, et al.
(författare)
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Comparison of MEG and TRPG of practical antennas
- 2004
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Ingår i: Proc. 15th IEEE Int. Symp. Personal, Indoor and Mobile Radio Communications PIMRC 2004. ; , s. 627-631
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Konferensbidrag (refereegranskat)abstract
- In this paper two figures of merit of UE antenna performance are compared, the Mean Effective Gain (MEG) and the Total Radiated Power Gain (TRPG). The ratio between these magnitudes has been evaluated first theoretically and later from measurements of four different handsets in the GSM, AMPS bands. In the evaluation different power angular distribution models were assumed. It is also shown that in practice an estimate of MEGcould be obtained from the TRPG.
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| 10. |
- Alayon Glazunov, Andres, et al.
(författare)
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Cost analysis of smart antenna systems deployment
- 2005
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Ingår i: Proc. VTC 2005-Spring Vehicular Technology Conf. 2005 IEEE 61st. ; , s. 329-333
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Konferensbidrag (refereegranskat)abstract
- 3G networks and services are being launched all over the world The basic investments on equipment have already been done according to preliminary traffic forecasts. However, if the mobile data traffic acquires "internet- like" proportions, network capacity shortage will become a reality in densely populated areas, such as city centers and business parks. In that case smart antennas may be the solution. Based on this assumption the financial aspects of the deployment of smart antenna systems in the 3G UMTS networks have been evaluated. We have evaluated the potential CAPEX and OPEX savings provided by such a system compared to more conventional antenna systems. Despite their indicative nature, our calculations show that cost savings of the order of 10% to 25% are feasible if the cost increase of the smart antenna equipment is of the order of 100% to 50% of the conventional antennas equipment costs, respectively.
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