Polarization Diversity in Wireless MIMO Systems

Kadir, M.F.A.; Suaidi, M. K.; Aziz, M. Z. A. Abd; Rose, Mitch; Shah, M.S.R.; Misman, D.; Rahim, Mohamad Kamal A.

doi:10.1109/nctt.2008.4814254

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…Therefore, in the presented MIMO antenna structure by placing the elements in an orthogonal alignment in space and using orthogonal radiation patterns, the envelope correlation coefficient has been improved. Moreover, using orthogonal alignment in the current design provides polarisation diversity which is desirable in many applications of the MIMO antennas [2, 5, 15].…”

Section: Antenna Design and Configurationmentioning

confidence: 99%

“…The proposed MIMO array antenna utilises two identical coplanar waveguide (CPW)‐fed reconfigurable planar antenna elements in which PIN diodes are employed in order to create switchable operations. Moreover, the basic reconfigurable planar antenna elements are aligned perpendicular to each other in space in order to improve the multipath performance of the presented MIMO array structure by using orthogonal polarisation technique [2, 4, 15]. In the following sections of this paper, the structure and the design procedure of the proposed MIMO antenna are explained in details.…”

Section: Introductionmentioning

confidence: 99%

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Design of reconfigurable coplanar waveguide‐fed planar antenna for multiband multi‐input–multi‐output applications

Shahmirzadi

Oraizi

2016

IET Microwaves, Antennas & Propagation

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A new design of frequency reconfigurable planar coplanar waveguide‐fed array antenna for multiband MIMO (multi‐input–multi‐output) applications is presented in this study. The proposed two elements MIMO array antenna consists of two identical basic reconfigurable antenna elements. Each basic antenna structure consists of two quarter‐wavelength resonators and is capable of operating in WLAN (wireless area network) and WiMAX frequency bands. The centre frequencies of the operating bands are controllable independently by tuning the length of the corresponding resonators. Employing switches on the proposed structure has led to three different switchable operations [WiMAX (3.36–3.7 GHz), WLAN (5–5.8 GHz) and WiMAX and WLAN (3.17–3.77 and 5.13–5.88 GHz) simultaneously]. Moreover, by arranging the antenna elements in an orthogonal alignment in space and using polarisation diversity technique, the multipath performance of the presented MIMO antenna is improved. The fabricated reconfigurable MIMO antenna has a compact size of 48.5 × 25 mm2 while having more than 16 dB isolation level between its ports for all its various switchable performances. The measured results reveal that the proposed antenna can be a good candidate for modern multiband MIMO applications.

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Section: Antenna Design and Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of reconfigurable coplanar waveguide‐fed planar antenna for multiband multi‐input–multi‐output applications

Shahmirzadi

Oraizi

2016

IET Microwaves, Antennas & Propagation

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“…Another complicated problem is the loss of systemic energy efficiency. This power-loss is manifested in the fact that without any spatial techniques such as polarization diversity, direct receiving of a transmitted signal that transmits from a vertically polarized antenna and is received with a horizontally polarized antenna, and also in the opposite case (i.e., transmitting from horizontally polarized antenna and receiving with a vertically polarized antenna), that is, a cross-polarization path, will result in a significant loss of power of 3 dB or more in the received signal [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…The first one is to achieve colossal bandwidth that is available only in the millimeter waveband that enables multi-gigabit wireless networks [ 8 ]. The second is to integrate practical advanced MIMO techniques such as Spatial-Multiplexing (SM) [ 24 ], Space-Time-Coding (STC) transmit-diversity [ 24 , 25 , 26 ], polarization-diversity [ 14 , 27 , 28 ], massive-MIMO [ 29 ] and hybrid-beam-forming [ 21 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of OSTBC-OFDM Combined with Dual-Polarization and Time-Diversity in Millimeter-Wave MIMO Channels with Rain Distortions

Elgam

Peretz²,

Pinhasi³

2022

Sensors

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Various destructive weather and physical phenomena affect many parameters in the radio layer (i.e., affecting the wireless paths Over-The-Air (OTA)) of many outdoor-to-outdoor wireless systems. These destructive effects create polarization torsion and rotation of the signals propagating in space and cause the scattering of wireless spatial paths. The direct meaning is a significant degradation in system performance, especially in the Quality-of-Service (QoS). Under these challenging scenarios, intelligent utilization of advanced Multiple-Input-Multiple-Output (MIMO) techniques such as polarization-diversity and time-diversity at the transmitter, as well as at the receiver, and intelligent use of the Cross-Polarization-Isolation (XPI) mechanism, are essential. We prove that combining these techniques with the tuning of the XPI of the antennas creates optimal conditions in the wireless MIMO channels. This combination does not only improve the system’s performance, but also turns the destructive physical phenomena in the spatial-domain, into an advantage. In this article, we focus on formulating a wireless communication MIMO model in millimeter-Wave (mmWave) channels under rain distortions. We demonstrate the optimal use of combining Orthogonal-Space-Time-Coding (OSTBC) and Maximal-Ratio-Receive-Combiner (MRRC) with cross-polarization diversity techniques, that utilize the tuning of the XPI. An analytical exact optimal solution is proposed, that allows the tuning of the leading parameters to achieve global optimal performance, in terms of channel-capacity and Bit-Error-Rate (BER). In addition, we propose a process of approximation of feedback-closed-loop-MIMO. The feedback is employed between the transmitter and the receiver, in the scenario of changes in the channel-response-matrix in-between successive symbol-times. The feedback was designed to acheive global-maximum channel-capacity, while preserving the channel-path orthogonality in order to minimize the BER.

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Metasurface Reflector with Independent Polarizations Control using a Supercell Concept

Rufail

Emara

Ashoor

et al. 2022

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)

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Polarization Diversity in Wireless MIMO Systems

Cited by 4 publications

References 5 publications

Design of reconfigurable coplanar waveguide‐fed planar antenna for multiband multi‐input–multi‐output applications

Design of reconfigurable coplanar waveguide‐fed planar antenna for multiband multi‐input–multi‐output applications

Analysis of OSTBC-OFDM Combined with Dual-Polarization and Time-Diversity in Millimeter-Wave MIMO Channels with Rain Distortions

Metasurface Reflector with Independent Polarizations Control using a Supercell Concept

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