Tri-polarized MIMO systems in real-world channels: Channel investigation and performance analysis

Quitin, François; Oestges, Claude; Panahandeh, Ali; Horlin, François; Doncker, Philippe De

doi:10.1016/j.phycom.2012.04.004

Cited by 11 publications

(7 citation statements)

References 27 publications

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“…And, the propagation condition is better in vertical-to-vertical channels. Similar trends have been investigated in [15,22]. In [15], it is found that polarization rotation is strong when the dipole is parallel to the ground, but the polarization is maintained when it is vertical to the ground.…”

Section: Cross-polarization Discriminationsupporting

confidence: 74%

“…To characterize the tripolarized MIMO channel, we rotate the dipole antenna in three orthogonal polarization directions to create virtual 3 × 3 MIMO channels [22]. Figure 2 shows the rotating positions of colocated antennas.…”

Section: System Settingmentioning

confidence: 99%

“…In [21], based on trip-polarized MIMO channel measurements in a corridor-to-office (C2O) scenario at 3.6 GHz, Ricean K-factor, cross-polarization discrimination (XPD), and correlation coefficients were analyzed. In [22], tripolarized MIMO channel measurements at 3.6 GHz were presented.…”

Section: Introductionmentioning

confidence: 99%

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Tripolarizated MIMO: Experimental Analysis and Modeling of Channel Properties in Both Indoor and Outdoor Scenarios

Tang

Zhang

Ying

et al. 2021

International Journal of Antennas and Propagation

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The tripolarized MIMO system can provide one more degree of freedom and have a more compacted size over a dual-polarized MIMO system, which is attractive for high-capacity wireless communication systems. In this paper, we analyze and model channel properties for tripolarized MIMO systems based on experimental channel measurements in typical indoor and outdoor scenarios. Firstly, channel measurement campaigns in the laboratory and the Urban Micro (UMi) scenarios on sub-6 GHz bands are presented. Then, based on measured data, path loss, delay spread (DS), and cross-polarization discrimination (XPD) for 9 polarization combinations are analyzed and modeled in a statistical way. Statistical results of these channel properties are also given. It is observed that channel properties of both large-scale fading and small-scale fading depend strongly on the polarization direction. Furthermore, we evaluate the performance of tripolarized MIMO systems by analyzing the Demmel condition number and channel capacity gain (CG). For both the indoor and the outdoor scenarios, it is found that colocated tripolarized antenna can bring a nearly threefold CG with respect to the unipolarized one. These results can give good insights into the design and evaluation of tripolarized MIMO systems.

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Section: Cross-polarization Discriminationsupporting

confidence: 74%

Section: System Settingmentioning

confidence: 99%

See 1 more Smart Citation

Tripolarizated MIMO: Experimental Analysis and Modeling of Channel Properties in Both Indoor and Outdoor Scenarios

Tang

Zhang

Ying

et al. 2021

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

show abstract

“…Controlling both amplitudes and phases of the weights can compensate the polarization distortions, but necessarily involves considerable power loss [3]. In wireless communications, above limitations make the performances of dual-polarized systems be sensitive to the This transmitter and receiver orientations [6]. Using tri-polarized (tripole) antennas [6] [7] can alleviate this problem, and there are several works focus on the low profile and low coupling design of tri-polarized antenna in the literature [8] [9].…”

Section: Introductionmentioning

confidence: 99%

Radiation Characteristics Analysis of Tri-Polarized Dipole Antenna

Wang

et al. 2016

Antennas Wirel. Propag. Lett.

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Dual-polarized antenna involves polarization purity degradation and power gain loss when scanning at wide angles. Aiming at mitigating above limitations, we exploit tri-polarized antenna for better radiation characteristics in this paper. We formulate the beam pattern synthesis problem of a single tripolarized dipole antenna in a convex form, and solve it with the Lagrange multiplier method. When circular polarization is synthesized, we show that degree of freedom increase improves the polarization purity and power gain of the multi-polarized antenna, especially at wide scan angles. And we further find that using the infinite current sheet model, the radiation pattern synthesized by tri-polarized antenna is the same with the optimally oriented dual-polarized antenna -the dual-polarized antenna is mechanically rotated to be oriented normally to the scanning direction. We discuss the situation when linear polarization is synthesized. We show that the power gain is increased corresponding to scan angle, while the polarization purity is not improved obviously.

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“…1a), the tri-polarised antenna add a new element orthogonal to the dual-polarised antenna plane, and the three radiators are aligned with the coordinates x, y, and z, respectively. In wireless communications, the tri-polarised antenna increases the capacity and the robustness [8][9][10][11][12] of the multiple-input-multiple-output systems and there are several designs of the tri-polarised antennas that have been proposed in [13,14]. In the current paper, we find a new property of tri-polarised antenna: tri-polarised antenna is virtually equivalent to a rotatable dual-polarised antenna, which will explain that why the tri-polarised antenna performs better than the dual-polarised antenna.…”

Section: Introductionmentioning

confidence: 99%

Tri‐polarised antenna – a virtual rotatable dual‐polarised antenna used in polarised beampattern synthesis

et al. 2015

IET Microwaves, Antennas & Propagation

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Tri‐polarised antennas are exploited to synthesise the optimal polarised beampattern in this study. First, the characteristics of a single tri‐polarised antenna are studied with an infinite current sheet model. Using the cross‐product algorithm, the authors find that three co‐located orthogonal current sheets are equivalent to a pair of orthogonal current sheets in a particular orientation. It implies that the tri‐polarised antenna is just virtually equivalent to a rotatable dual‐polarised antenna. Then by formulating the problem in a convex form, they adopt the convex optimisation algorithm to synthesise optimal polarised beampattern of the tri‐polarised array. The simulation results show that due to the increased orientation degree of freedom, the sidelobe and cross‐polarisation level of tri‐polarised array are significantly lower than the dual‐polarised array.

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Tri-polarized MIMO systems in real-world channels: Channel investigation and performance analysis

Cited by 11 publications

References 27 publications

Tripolarizated MIMO: Experimental Analysis and Modeling of Channel Properties in Both Indoor and Outdoor Scenarios

Tripolarizated MIMO: Experimental Analysis and Modeling of Channel Properties in Both Indoor and Outdoor Scenarios

Radiation Characteristics Analysis of Tri-Polarized Dipole Antenna

Tri‐polarised antenna – a virtual rotatable dual‐polarised antenna used in polarised beampattern synthesis

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