Performance Evaluation of Actual Multielement Antenna Systems Under Transmit Antenna Selection/Maximal Ratio Combining

Papamichael, V.; Karadimas, Petros

doi:10.1109/lawp.2011.2161662

Cited by 17 publications

(15 citation statements)

References 14 publications

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“…Comparisons with the simulated results from [9] are also presented, thus further confirming the validity and usefulness of the proposed methodology. In [9], the DAG-OP of compact MPA systems under TAS/MRC was just studied using a stochastic electromagnetic simulation method. Complete TAS/MRC performance in terms of DAG-OP and DAG-BER is analytically studied for the first time in this paper, when incorporating termination conditions and radiation characteristics of realistic MPA systems.…”

Section: Introductionsupporting

confidence: 60%

“…The calculated DAG-OPs at 1% OP are 13.5 and 17.6 dB for the 2-and 4-element antennas, respectively. Comparisons with the simulated results published in [9] are also shown, where an excellent conformity is revealed. The respective DAG-OPs were 13.2 and 17.3 dB.…”

Section: Resultsmentioning

confidence: 58%

“…We employ the transmit antenna selection/maximal ratio combining (TAS/MRC) as a hybrid technique exploiting diversity at both link ends and incorporating MRC as special case [9], [10]. Comparisons with the simulated results from [9] are also presented, thus further confirming the validity and usefulness of the proposed methodology. In [9], the DAG-OP of compact MPA systems under TAS/MRC was just studied using a stochastic electromagnetic simulation method.…”

Section: Introductionmentioning

confidence: 69%

“…In order to calculate the diversity performance of these systems and make fair comparisons with existing published results, we determine the covariance matrix assuming a uniform propagation environment as in [6] and [9], i.e., XPR 1 Figs.2 and 3, the termination load impedance matrix is L0 Z  ZI . We further assume two Tx antennas as in [9]. Results are summarized in Tables I, II and discussed in the following.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

On the Covariance Matrix and Diversity Performance Evaluation of Compact Multiport Antenna Systems

Papamichael¹,

Karadimas

2017

IEEE Trans. Antennas Propagat.

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Abstract-In this paper, we present a new electromagnetic methodology that determines the covariance matrix of compact multi-port antenna (MPA) systems at the early design stage. Further insight to this field is provided, as contrary to existing methodologies, it rigorously relies on the reciprocity principle of MPA systems. Thus, the impact of propagation environment, termination conditions and MPA radiation characteristics as independent factors affecting performance is physically incorporated. Provided the availability of mathematical expressions for the cumulative distribution function (CDF) and probability density function (PDF) of received signal-to-noise ratio (SNR), performance can be then analytically studied via the diversity antenna gain (DAG) in terms of a) SNR enhancement at a specific outage probability (OP) level (that is DAG-OP) and b) average SNR reduction for achieving a specific average bit error rate (BER) (that is DAG-BER). Illustrative examples with performance evaluation of compact MPA systems are presented. The adopted diversity technique is the transmit antenna selection/maximal ratio combining (TAS/MRC), which for the first time is analytically studied employing realistic MPA systems. Comparisons with existing published results further demonstrate the validity and usefulness of the proposed methodology.Index Terms-Antenna diversity, Covariance matrix methodology, Diversity antenna gain, Multi-port antenna systems.

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Section: Introductionsupporting

confidence: 60%

Section: Resultsmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

On the Covariance Matrix and Diversity Performance Evaluation of Compact Multiport Antenna Systems

Papamichael¹,

Karadimas

2017

IEEE Trans. Antennas Propagat.

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“…Furthermore, the radio communication environments suffer from the problem of multipath fading, which leads to deterioration of the received signal strength. To overcome these challenges, UWB systems with several diversity schemes such as time, frequency, spatial, or polarization have been reported . The spatial diversity involves spatial replication of antenna elements, usually at the receiver side.…”

Section: Introductionmentioning

confidence: 99%

Multiple‐input‐multiple‐output/diversity antenna with dual band‐notched characteristics for ultra‐wideband applications

Kumar

Lee

Kim

et al. 2019

Micro & Optical Tech Letters

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Design and implementation of a four‐port ultra‐wideband (UWB) multiple‐input‐multiple‐output (MIMO)/diversity antenna with dual band‐notched characteristics are presented. The proposed diversity antenna is composed of four identical rhombic‐shaped monopole radiators arranged orthogonally to achieve better interelement isolation and polarization diversity. At each port, the MIMO antenna shows an impedance bandwidth (S11 ≤ –10 dB) of 10.5 GHz (2.8‐13.3 GHz) and an interelement isolation larger than 18 dB. Furthermore, in order to eliminate 3.5 GHz (Wi‐MAX) and 5.5 GHz (WLAN) bands from the UWB range, the antenna radiators are loaded with elliptical complementary split ring resonator structures. The MIMO performance metrics such as isolation, envelope correlation coefficient, and apparent diversity gain are calculated and presented. The MIMO/diversity antenna prototype is fabricated, and experimental results are verified with simulated results.

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Three‐dimensional cylindrical design multiple‐input‐multiple‐output/diversity antenna with high isolation for wireless communication applications

Mishra

Das

Pattnaik

et al. 2019

Int J RF Microw Comput Aided Eng

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In this article, a three-port nonplanar multiple-input-multiple-output/diversity antenna with very high isolation between the radiating elements is presented. To realize diversity from the proposed three-dimensional (3-D) antenna configuration, three monopole radiating elements are arranged at an angle of 120 . The isolation between the radiators is enhanced by using a multilayered cylindrical decoupling structure and defected ground structure (DGS). The DGS reduces the coupling due to surface waves while the cylindrical decoupling structure reduces the coupling due to space waves. The proposed antenna offers consistent pervasive connectivity in the wireless communication environment due to its 3-D geometry with multiple radiating elements and good diversity performance. The prototype is fabricated and measured result shows that more than 42 dB isolation is obtained at the center frequency 1.45 GHz. An increment of 1.2 dBi in the antenna gain is also achieved by using DGS and decoupling structure arrangement. The proposed antenna can be easily placed inside the cylindrical housing or it can be integrated with the existing electronics chip, thus nullifying the requirement for dedicated location in the system. K E Y W O R D Scylindrical decoupling structure, DGS, isolation, MIMO, monopole, diversity

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Performance Evaluation of Actual Multielement Antenna Systems Under Transmit Antenna Selection/Maximal Ratio Combining

Cited by 17 publications

References 14 publications

On the Covariance Matrix and Diversity Performance Evaluation of Compact Multiport Antenna Systems

On the Covariance Matrix and Diversity Performance Evaluation of Compact Multiport Antenna Systems

Multiple‐input‐multiple‐output/diversity antenna with dual band‐notched characteristics for ultra‐wideband applications

Three‐dimensional cylindrical design multiple‐input‐multiple‐output/diversity antenna with high isolation for wireless communication applications

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